Whey Isolate

Isolate takes whey filtration further: more protein per serving, very little lactose, lighter digestion. It's the choice for cutting phases, sensitive stomachs, and those who consume multiple shakes a day. Here you'll find isolates from our brands, both unflavored and flavored, with the protein content displayed per serving.

IO Genix Isolate Professional - PROMILK CFM microfiltration whey isolate
IO Genix Isolate Professional - PROMIKO CFM Microfiltration IO.GENIX
IO Genix Isolate Professional - PROMIKO CFM Microfiltration IO.GENIX
IO.GENIX

IO Genix Isolate Professional

(17)

63,90 € From 59,90 €
Sinob Honest Whey - premium whey protein concentrate
Honest Whey Sinob - Whey Protein Concentrate Sinob
Honest Whey Sinob - Whey Protein Concentrate Sinob
Sinob

Sinob Honest Whey

(10)

45,90 € 41,31 €
IO Genix Isoluxe CFM - grass fed whey isolate, Luxury line
IO Genix ISOLUXE CFM - Grass Fed Whey Isolate Luxury Line IO.GENIX
IO Genix ISOLUXE CFM - Grass Fed Whey Isolate Luxury Line IO.GENIX
IO.GENIX

IO Genix Isoluxe CFM

(0)

37,00 € From 34,90 €
Protealpes Whey Protein - pure isolate with no sugar or additives
Protéalpes Sugar-Free Whey Protein - Pure Isolate Without Additives Protéalpes
Protéalpes Sugar-Free Whey Protein - Pure Isolate Without Additives Protéalpes
Protéalpes

Protéalpes Whey Protein

(0)

39,95 €

ESN Clear Whey Isolate - clear and refreshing protein
ESN Clear Whey Isolate - Refreshing Clear Whey ESN
ESN Clear Whey Isolate - Refreshing Clear Whey ESN
ESN

ESN Clear Whey Isolate

(0)

59,90 €

IO Genix Milk Protein Isolate 100 - Solmiko milk protein isolate
Milk Protein Isolate 100 - IO.Genix Milk Protein Isolate IO.GENIX
Milk Protein Isolate 100 - IO.Genix Milk Protein Isolate IO.GENIX
IO.GENIX

IO Genix Milk Protein Isolate 100

(0)

49,90 € From 42,90 €
Per4m Egg White Protein - lactose-free egg white protein
Per4m Egg White Protein Per4m
Per4m Egg White Protein Per4m
Per4m

Per4m Egg White Protein

(0)

49,90 €

Applied Nutrition Beef XP 1.8 kg - clear beef protein isolate
Applied Nutrition Beef XP - Clear Beef Protein Isolate 1.8kg APPLIED NUTRITION
Applied Nutrition Beef XP - Clear Beef Protein Isolate 1.8kg APPLIED NUTRITION
APPLIED NUTRITION

Applied Nutrition Beef XP 1.8 kg

(0)

59,90 €

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What exactly is whey isolate?

Whey isolate is not a different protein from whey concentrate: it is the same whey, purified further. Each filtration step removes some of what is not protein—lactose, fat, minerals.

The result is visible on the nutritional label: a concentrate contains 70 to 80% protein per 100g of powder, while an isolate generally exceeds 85% and the best ones go beyond 90%. What disappears is primarily lactose, reduced to trace amounts. So, you're not paying for a "superior" protein, but a cleaner protein: less residual sugar, less fat, and a smoother texture in a shaker. The amino acid profile, however, does not change.

Isolate, Concentrate or Hydrolyzed: Which one do you need?

The honest answer is often disappointing: for the majority of users, whey concentrate is more than sufficient. If you digest dairy well and train three to five times a week without competitive goals, the difference between 75% and 90% protein amounts to a few grams per serving—which can be made up with a yogurt or two eggs. Whey concentrate therefore remains the rational choice when on a tight budget and experiencing no digestive discomfort; for mass gain, its extra calories even work in your favor.

Three situations truly justify its higher cost: a lactose intolerance, even moderate, leading to bloating after a shake; a cutting phase where every gram of carbohydrates and fats is meticulously counted; or high consumption, two to three doses per day, where the cumulative digestive load eventually becomes an issue.

Hydrolyzed whey goes a step further: the protein chains are pre-digested into short peptides by enzymatic action. Absorption is faster, but the price increases and the taste becomes bitter, for an imperceptible gain—we reserve it for very sensitive stomachs. If thick shakes put you off, clear whey is an isolate that produces a clear drink; and if dairy is excluded from your diet, consider plant-based proteins.

What does the filtration process change?

Cold microfiltration (CFM, for cross-flow microfiltration) separates components using a membrane, without excessive heat or solvents: it preserves native protein fractions and results in a milkier taste. Ion exchange captures proteins by their electrical charge; the resulting protein content is very high, sometimes even higher, but the process is more selective and preferentially retains certain fractions—very pure in terms of percentage, but slightly less complete in terms of profile.

Choose ion exchange for the raw protein content at the best price, CFM for the taste: the difference in your training results remains marginal.

How to read a whey isolate label?

Look at the "per 100g" column, never the "per serving" column. One brand advertises 25g of protein per serving, another 24g: it's impossible to compare if the first serving weighs 33g and the second 27g. When scaled to 100g, the difference ranges from 75% to 89%.

Check the position of amino acids in the ingredients list. Some formulas add glycine, taurine, or glutamine to the powder. These isolated amino acids count in the regulated nitrogen analysis and therefore inflate the advertised protein content, without providing the complete profile of a whole protein: this is amino spiking. Placed high in the list, right after the isolate, they raise suspicion; at the end of the list, they are inconsequential.

Check carbohydrates and fats. A powder showing 4g of carbohydrates per 100g is not a true isolate. Below 2g of carbohydrates and 1.5g of fats, the product is consistent with its name.

Calculate the price per kilogram of protein, not per kilogram of powder. This is the only honest metric: price of the tub, divided by weight in kilograms, divided by protein percentage. A product at €30 per kilogram with 75% protein comes to €40 per kilogram of protein; a product at €36 per kilogram with 90% protein also comes to €40. The actual price is the same, and the second one is more digestible. This calculation tells you if the extra cost is truly an extra cost.

What dosage, at what time?

Whey isolate is a supplemental intake, not a trigger: what determines your progress is your total protein intake over the day, not the time of your shake. A standard dose provides 25 to 30g of protein, a quantity generally considered to fully stimulate protein synthesis in a meal; beyond that, the surplus is used like any other food intake.

For the daily total, ANSES recommends 0.83g of protein per kilogram of body weight per day for healthy adults; usual guidelines in sports nutrition place bodybuilders significantly higher, around 1.6 to 2g per kilo. A 75kg individual would therefore aim for 120 to 150g per day, including food: the powder only serves to fill what's missing, i.e., one to two doses.

Post-workout is convenient, not magical: the "anabolic window" of thirty minutes has been largely debunked, the main thing is to spread your intake throughout the day. Isolate is well-suited for post-workout and breakfast, because it's easy to digest; for a slow-release protein in the evening, casein is more appropriate. Dilute in 250 to 350 ml of water. For mass gain, adding a carbohydrate source like rice cream makes more sense than choosing a fattier powder.

What should you not expect from an isolate?

It doesn't build muscle on its own: without progressive resistance training and sufficient caloric intake, no powder will build anything. Nor does it cause weight loss: it helps maintain a caloric deficit by providing a lot of protein for few calories, but it's the deficit that does the work.

It is also not a solution for a cow's milk protein allergy: filtration removes lactose, not milk proteins. In case of a diagnosed allergy, it is contraindicated. Finally, high protein intake requires medical advice in cases of known kidney or liver insufficiency, pregnancy, breastfeeding, or chronic illness.

Frequently Asked Questions

What is whey isolate?

It's whey—whey protein—filtered further. The process removes lactose, fats, and some minerals, increasing the protein content to over 85g per 100g of powder. It's not a different molecule: it's the same protein, more concentrated and cleaner.

What's the difference between whey and isolate?

The degree of purification, nothing else. Whey concentrate contains 70 to 80% protein and retains lactose and fats; isolate exceeds 85%, often 90%, with trace amounts of lactose. The amino acid profile is the same, as is leucine. What concretely changes is digestion and the number of calories per serving.

Which whey is the most effective?

None is more effective with equal protein intake: concentrate, isolate, and hydrolyzed all trigger the same protein synthesis. The most effective is therefore the one you digest well, take regularly, and whose price per kilogram of protein fits your budget. The rest is marketing.

Why take whey isolate?

For three concrete reasons, and not because it is "superior" to other whey. First, digestibility: lactose is only present in trace amounts, which resolves bloating after a shake. Then, density: over 85g of protein per 100g of powder compared to 70 to 80 for a concentrate, meaning very few carbohydrates and lipids per serving, which really matters during cutting phases. Finally, the texture, which is smoother when mixed with water. If none of these three points concern you, a concentrate will do the same job for less money.

Which whey should I choose?

Start with your digestion and budget, not marketing. If you digest dairy well and are budget-conscious: concentrate. If you experience discomfort after a shake or are cutting: isolate. If you have a very sensitive stomach and price is not an issue: hydrolyzed. If dairy is excluded from your diet: plant-based proteins. Then, within each category, choose based on three lines of the label—protein percentage per 100g, residual carbohydrates, position of added amino acids in the list of ingredients—then calculate the price per kilogram of protein, the only honest comparison between two tubs.

When should I take whey isolate?

When you need more protein, not at a specific time. Post-workout and breakfast are the two most practical times because isolate is easy to digest. In the evening, casein is more suitable. A dose of 25 to 30g in 250 to 350 ml of water is sufficient.

Which whey for mass gain?

A concentrate, in most cases. Its residual carbohydrates and fats provide additional calories, which is precisely the goal when seeking a surplus, and it costs less per kilogram of protein. Isolate is only necessary for mass gain if you have trouble digesting other types. The decisive factor is elsewhere: total caloric surplus and progressive overload. To boost a shake, add carbohydrates like rice cream or oat flakes, and take your creatine monohydrate every day, in your shake or elsewhere.

Which whey for weight loss?

No whey causes weight loss: it's the caloric deficit that does the work. What an isolate provides in this context is a very favorable protein/calorie ratio—around 100 kcal for 25g of protein—thus decent satiety for few calories, which helps maintain the deficit and limit muscle mass loss. Place it where your protein intake is lacking: breakfast, afternoon snack, or after a workout. The time matters little; the daily total, around 1.6 to 2g per kg of body weight, matters a lot.

Whey: how long after training?

Within two hours, without rushing. The thirty-minute anabolic window has been largely relativized: what determines muscle building is the total protein intake over the day, divided into 25 to 30g servings. If your last meal was five or six hours ago, a shake right after the session makes sense; if you ate an hour before, there's no rush and the next meal will suffice. EAAs taken during the session are not a substitute: they are a stopgap, they don't provide 25g of complete protein.

Can you take whey without exercising?

Yes, without particular danger for a healthy adult: whey is a food, a milk protein concentrate, just like cottage cheese. It helps when diet doesn't cover protein needs, for example, in an elderly person or someone in convalescence. However, it offers no muscle benefits without progressive resistance training: without stimulus, the surplus is used like any other food intake. In case of kidney or liver insufficiency, pregnancy, or chronic illness, consult your doctor.

Is whey isolate suitable for lactose intolerant individuals?

In most cases, yes: filtration removes most of it, and people bothered by a concentrate generally tolerate it without difficulty. Very pronounced intolerances may still be sensitive to residual traces; only a small test will tell. Digestive enzymes help in borderline cases.

Does it build more muscle than concentrate?

No, not with an equivalent total protein intake: the amino acid profile is comparable and leucine, which triggers protein synthesis, is present in both. The difference lies in digestibility and density, not in muscle-building potential.

What isolate brands do we offer?

Our selection prioritizes legible labels: protein percentage per 100g displayed, short ingredient list, indicated origin of whey. This includes Protéalpes, whose isolate is produced in France, the ESN range, Applied Nutrition, and Rule One. All our powders are grouped in the protein section.

Where to compare isolates near Montpellier?

Our store in Vendargues, about ten minutes from Montpellier, allows you to turn over the tubs and compare nutritional labels side by side. For an isolate, the decision hinges on three lines: protein percentage per 100g, residual carbohydrates, and the position of amino acids in the list. We also ship everywhere in France—and if you hesitate between two references, write to us: the answer is sometimes that a concentrate will do just as well, for less.

If you are still comparing several brands before choosing, our whey protein comparison reviews the criteria one by one, from actual protein content to price per kilogram of protein.

Sources: ANSES for protein nutritional references, Ciqual for food composition.

To go further: our iso whey guide.

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Rule One Whey Blend - triple source whey protein
Rule One Whey Blend - Triple Source Protein Rule One
Rule One Whey Blend - Triple Source Protein Rule One
Rule One

Rule One Whey Blend

(0)

From 49,90 €

Rule One Clear Isolate 689 g - crystal clear protein with electrolytes
Rule One Clear Isolate 689g - Crystal Clear Protein & Electrolytes Rule1
Rule One Clear Isolate 689g - Crystal Clear Protein & Electrolytes Rule1
Rule1

Rule One Clear Isolate 689 g

(0)

55,90 €

Retrait au magasin sous 2 h

À Vendargues, près de Montpellier. Vous êtes prévenu dès que la commande est prête.

Commandé avant 14 h, expédié le jour même

Du lundi au samedi. Le délai d'acheminement appartient ensuite au transporteur.

Livraison offerte dès 50 €

En France métropolitaine, et dès 100 € en Europe. Modes et délais.

Une question avant de commander ?

Écrivez-nous ou passez au magasin : on connaît les produits qu'on vend.

What exactly is whey isolate?

Whey isolate is not a different protein from whey concentrate: it is the same whey, purified further. Each filtration step removes some of what is not protein—lactose, fat, minerals.

The result is visible on the nutritional label: a concentrate contains 70 to 80% protein per 100g of powder, while an isolate generally exceeds 85% and the best ones go beyond 90%. What disappears is primarily lactose, reduced to trace amounts. So, you're not paying for a "superior" protein, but a cleaner protein: less residual sugar, less fat, and a smoother texture in a shaker. The amino acid profile, however, does not change.

Isolate, Concentrate or Hydrolyzed: Which one do you need?

The honest answer is often disappointing: for the majority of users, whey concentrate is more than sufficient. If you digest dairy well and train three to five times a week without competitive goals, the difference between 75% and 90% protein amounts to a few grams per serving—which can be made up with a yogurt or two eggs. Whey concentrate therefore remains the rational choice when on a tight budget and experiencing no digestive discomfort; for mass gain, its extra calories even work in your favor.

Three situations truly justify its higher cost: a lactose intolerance, even moderate, leading to bloating after a shake; a cutting phase where every gram of carbohydrates and fats is meticulously counted; or high consumption, two to three doses per day, where the cumulative digestive load eventually becomes an issue.

Hydrolyzed whey goes a step further: the protein chains are pre-digested into short peptides by enzymatic action. Absorption is faster, but the price increases and the taste becomes bitter, for an imperceptible gain—we reserve it for very sensitive stomachs. If thick shakes put you off, clear whey is an isolate that produces a clear drink; and if dairy is excluded from your diet, consider plant-based proteins.

What does the filtration process change?

Cold microfiltration (CFM, for cross-flow microfiltration) separates components using a membrane, without excessive heat or solvents: it preserves native protein fractions and results in a milkier taste. Ion exchange captures proteins by their electrical charge; the resulting protein content is very high, sometimes even higher, but the process is more selective and preferentially retains certain fractions—very pure in terms of percentage, but slightly less complete in terms of profile.

Choose ion exchange for the raw protein content at the best price, CFM for the taste: the difference in your training results remains marginal.

How to read a whey isolate label?

Look at the "per 100g" column, never the "per serving" column. One brand advertises 25g of protein per serving, another 24g: it's impossible to compare if the first serving weighs 33g and the second 27g. When scaled to 100g, the difference ranges from 75% to 89%.

Check the position of amino acids in the ingredients list. Some formulas add glycine, taurine, or glutamine to the powder. These isolated amino acids count in the regulated nitrogen analysis and therefore inflate the advertised protein content, without providing the complete profile of a whole protein: this is amino spiking. Placed high in the list, right after the isolate, they raise suspicion; at the end of the list, they are inconsequential.

Check carbohydrates and fats. A powder showing 4g of carbohydrates per 100g is not a true isolate. Below 2g of carbohydrates and 1.5g of fats, the product is consistent with its name.

Calculate the price per kilogram of protein, not per kilogram of powder. This is the only honest metric: price of the tub, divided by weight in kilograms, divided by protein percentage. A product at €30 per kilogram with 75% protein comes to €40 per kilogram of protein; a product at €36 per kilogram with 90% protein also comes to €40. The actual price is the same, and the second one is more digestible. This calculation tells you if the extra cost is truly an extra cost.

What dosage, at what time?

Whey isolate is a supplemental intake, not a trigger: what determines your progress is your total protein intake over the day, not the time of your shake. A standard dose provides 25 to 30g of protein, a quantity generally considered to fully stimulate protein synthesis in a meal; beyond that, the surplus is used like any other food intake.

For the daily total, ANSES recommends 0.83g of protein per kilogram of body weight per day for healthy adults; usual guidelines in sports nutrition place bodybuilders significantly higher, around 1.6 to 2g per kilo. A 75kg individual would therefore aim for 120 to 150g per day, including food: the powder only serves to fill what's missing, i.e., one to two doses.

Post-workout is convenient, not magical: the "anabolic window" of thirty minutes has been largely debunked, the main thing is to spread your intake throughout the day. Isolate is well-suited for post-workout and breakfast, because it's easy to digest; for a slow-release protein in the evening, casein is more appropriate. Dilute in 250 to 350 ml of water. For mass gain, adding a carbohydrate source like rice cream makes more sense than choosing a fattier powder.

What should you not expect from an isolate?

It doesn't build muscle on its own: without progressive resistance training and sufficient caloric intake, no powder will build anything. Nor does it cause weight loss: it helps maintain a caloric deficit by providing a lot of protein for few calories, but it's the deficit that does the work.

It is also not a solution for a cow's milk protein allergy: filtration removes lactose, not milk proteins. In case of a diagnosed allergy, it is contraindicated. Finally, high protein intake requires medical advice in cases of known kidney or liver insufficiency, pregnancy, breastfeeding, or chronic illness.

Frequently Asked Questions

What is whey isolate?

It's whey—whey protein—filtered further. The process removes lactose, fats, and some minerals, increasing the protein content to over 85g per 100g of powder. It's not a different molecule: it's the same protein, more concentrated and cleaner.

What's the difference between whey and isolate?

The degree of purification, nothing else. Whey concentrate contains 70 to 80% protein and retains lactose and fats; isolate exceeds 85%, often 90%, with trace amounts of lactose. The amino acid profile is the same, as is leucine. What concretely changes is digestion and the number of calories per serving.

Which whey is the most effective?

None is more effective with equal protein intake: concentrate, isolate, and hydrolyzed all trigger the same protein synthesis. The most effective is therefore the one you digest well, take regularly, and whose price per kilogram of protein fits your budget. The rest is marketing.

Why take whey isolate?

For three concrete reasons, and not because it is "superior" to other whey. First, digestibility: lactose is only present in trace amounts, which resolves bloating after a shake. Then, density: over 85g of protein per 100g of powder compared to 70 to 80 for a concentrate, meaning very few carbohydrates and lipids per serving, which really matters during cutting phases. Finally, the texture, which is smoother when mixed with water. If none of these three points concern you, a concentrate will do the same job for less money.

Which whey should I choose?

Start with your digestion and budget, not marketing. If you digest dairy well and are budget-conscious: concentrate. If you experience discomfort after a shake or are cutting: isolate. If you have a very sensitive stomach and price is not an issue: hydrolyzed. If dairy is excluded from your diet: plant-based proteins. Then, within each category, choose based on three lines of the label—protein percentage per 100g, residual carbohydrates, position of added amino acids in the list of ingredients—then calculate the price per kilogram of protein, the only honest comparison between two tubs.

When should I take whey isolate?

When you need more protein, not at a specific time. Post-workout and breakfast are the two most practical times because isolate is easy to digest. In the evening, casein is more suitable. A dose of 25 to 30g in 250 to 350 ml of water is sufficient.

Which whey for mass gain?

A concentrate, in most cases. Its residual carbohydrates and fats provide additional calories, which is precisely the goal when seeking a surplus, and it costs less per kilogram of protein. Isolate is only necessary for mass gain if you have trouble digesting other types. The decisive factor is elsewhere: total caloric surplus and progressive overload. To boost a shake, add carbohydrates like rice cream or oat flakes, and take your creatine monohydrate every day, in your shake or elsewhere.

Which whey for weight loss?

No whey causes weight loss: it's the caloric deficit that does the work. What an isolate provides in this context is a very favorable protein/calorie ratio—around 100 kcal for 25g of protein—thus decent satiety for few calories, which helps maintain the deficit and limit muscle mass loss. Place it where your protein intake is lacking: breakfast, afternoon snack, or after a workout. The time matters little; the daily total, around 1.6 to 2g per kg of body weight, matters a lot.

Whey: how long after training?

Within two hours, without rushing. The thirty-minute anabolic window has been largely relativized: what determines muscle building is the total protein intake over the day, divided into 25 to 30g servings. If your last meal was five or six hours ago, a shake right after the session makes sense; if you ate an hour before, there's no rush and the next meal will suffice. EAAs taken during the session are not a substitute: they are a stopgap, they don't provide 25g of complete protein.

Can you take whey without exercising?

Yes, without particular danger for a healthy adult: whey is a food, a milk protein concentrate, just like cottage cheese. It helps when diet doesn't cover protein needs, for example, in an elderly person or someone in convalescence. However, it offers no muscle benefits without progressive resistance training: without stimulus, the surplus is used like any other food intake. In case of kidney or liver insufficiency, pregnancy, or chronic illness, consult your doctor.

Is whey isolate suitable for lactose intolerant individuals?

In most cases, yes: filtration removes most of it, and people bothered by a concentrate generally tolerate it without difficulty. Very pronounced intolerances may still be sensitive to residual traces; only a small test will tell. Digestive enzymes help in borderline cases.

Does it build more muscle than concentrate?

No, not with an equivalent total protein intake: the amino acid profile is comparable and leucine, which triggers protein synthesis, is present in both. The difference lies in digestibility and density, not in muscle-building potential.

What isolate brands do we offer?

Our selection prioritizes legible labels: protein percentage per 100g displayed, short ingredient list, indicated origin of whey. This includes Protéalpes, whose isolate is produced in France, the ESN range, Applied Nutrition, and Rule One. All our powders are grouped in the protein section.

Where to compare isolates near Montpellier?

Our store in Vendargues, about ten minutes from Montpellier, allows you to turn over the tubs and compare nutritional labels side by side. For an isolate, the decision hinges on three lines: protein percentage per 100g, residual carbohydrates, and the position of amino acids in the list. We also ship everywhere in France—and if you hesitate between two references, write to us: the answer is sometimes that a concentrate will do just as well, for less.

If you are still comparing several brands before choosing, our whey protein comparison reviews the criteria one by one, from actual protein content to price per kilogram of protein.

Sources: ANSES for protein nutritional references, Ciqual for food composition.

To go further: our iso whey guide.

Questions fréquentes — Whey Isolate

La whey isolate, c'est quoi ?

C'est de la whey — de la protéine de lactosérum — poussée plus loin dans la filtration. Le procédé retire le lactose, les matières grasses et une partie des minéraux, ce qui fait monter la teneur en protéines au-dessus de 85 g pour 100 g de poudre. Ce n'est pas une autre molécule : c'est la même protéine, plus concentrée et plus propre.

Quelle différence entre whey et isolate ?

Le degré de purification, rien d'autre. Une whey concentrée titre 70 à 80 % de protéines et garde du lactose et des graisses ; une isolate dépasse 85 %, souvent 90 %, avec du lactose à l'état de traces. Le profil en acides aminés est le même, la leucine aussi. Ce qui change concrètement, c'est la digestion et le nombre de calories par dose.

Quelle est la whey la plus efficace ?

Aucune ne l'est davantage à apport protéique égal : concentrée, isolate et hydrolysée déclenchent la même synthèse protéique. La plus efficace est donc celle que vous digérez bien, que vous prenez régulièrement, et dont le prix au kilo de protéine tient dans votre budget. Le reste relève du marketing.

Pourquoi prendre de la whey isolate ?

Pour trois raisons concrètes, et pas parce qu'elle serait « supérieure » aux autres whey. D'abord la digestibilité : le lactose n'est plus qu'à l'état de traces, ce qui règle les ballonnements après shaker. Ensuite la densité : plus de 85 g de protéines pour 100 g de poudre contre 70 à 80 pour une concentrée, donc très peu de glucides et de lipides par dose, ce qui compte réellement en sèche. Enfin la texture, plus fluide à l'eau. Si aucun de ces trois points ne vous concerne, une concentrée fera le même travail pour moins cher.

Quelle whey choisir ?

Partez de votre digestion et de votre budget, pas du marketing. Vous digérez bien le lait et vous surveillez le prix : concentrée. Vous êtes gêné après un shaker ou vous êtes en sèche : isolate. Vous avez un estomac très sensible et le prix vous importe peu : hydrolysée. Le lait est exclu de votre alimentation : protéines végétales. Ensuite, dans chaque catégorie, tranchez sur trois lignes de l'étiquette — taux protéique pour 100 g, glucides résiduels, place des acides aminés ajoutés dans la liste d'ingrédients — puis calculez le prix au kilo de protéine, seule comparaison honnête entre deux pots.

Quand prendre l'isolat de whey ?

Quand il vous manque des protéines, pas à une heure précise. Le post-entraînement et le petit-déjeuner sont les deux moments les plus pratiques parce que l'isolate est légère à digérer. Le soir, une caséine est plus adaptée. Une dose de 25 à 30 g dans 250 à 350 ml d'eau suffit.

Quelle whey pour la prise de masse ?

Une concentrée, dans la majorité des cas. Ses glucides et lipides résiduels apportent des calories supplémentaires, ce qui est précisément l'objectif quand on cherche un surplus, et elle coûte moins cher au kilo de protéine. L'isolate ne s'impose en prise de masse que si vous digérez mal le reste. Le levier décisif est ailleurs : le surplus calorique total et la progression des charges. Pour densifier un shaker, ajoutez plutôt des glucides comme de la crème de riz ou des flocons d'avoine, et prenez votre créatine monohydrate chaque jour, dans le shaker ou ailleurs.

Quelle whey pour maigrir ?

Aucune whey ne fait maigrir : c'est le déficit calorique qui travaille. Ce qu'une isolate apporte dans ce contexte, c'est un rapport protéines / calories très favorable — de l'ordre de 100 kcal pour 25 g de protéines — donc une satiété correcte pour peu de calories, ce qui aide à tenir le déficit et à limiter la perte de masse musculaire. Placez-la là où vos protéines manquent : petit-déjeuner, collation de l'après-midi, ou après la séance. L'heure importe peu ; le total de la journée, autour de 1,6 à 2 g par kilo de poids de corps, importe beaucoup.

Whey : combien de temps après l'entraînement ?

Dans les deux heures qui suivent, sans précipitation. La fenêtre anabolique de trente minutes a été largement relativisée : ce qui détermine la construction musculaire, c'est le total de protéines sur la journée, réparti en prises de 25 à 30 g. Si votre dernier repas remonte à cinq ou six heures, le shaker juste après la séance a du sens ; si vous avez mangé une heure avant, rien ne presse et le repas suivant fera l'affaire. Les EAA pris pendant la séance ne s'y substituent pas : ils dépannent, ils n'apportent pas 25 g de protéines complètes.

Peut-on prendre de la whey sans faire de sport ?

Oui, sans danger particulier chez un adulte en bonne santé : la whey est un aliment, un concentré de protéines de lait, au même titre qu'un fromage blanc. Elle dépanne quand l'alimentation ne couvre pas les besoins en protéines, par exemple chez une personne âgée ou en convalescence. Elle n'apporte en revanche aucun bénéfice musculaire sans entraînement en résistance : sans stimulus, le surplus est utilisé comme n'importe quel apport alimentaire. En cas d'insuffisance rénale ou hépatique, de grossesse ou de pathologie chronique, demandez l'avis de votre médecin.

La whey isolate convient-elle aux intolérants au lactose ?

Dans la plupart des cas, oui : la filtration en retire l'essentiel, et les personnes gênées par une concentrée la tolèrent généralement sans difficulté. Les intolérances très marquées peuvent rester sensibles aux traces résiduelles ; seul un essai sur une petite quantité le dira. Des enzymes digestives aident dans les cas limites.

Fait-elle prendre plus de muscle que la concentrée ?

Non, pas à apport protéique total équivalent : le profil en acides aminés est comparable et la leucine, qui déclenche la synthèse protéique, est présente dans les deux. La différence porte sur la digestibilité et la densité, pas sur le potentiel de construction musculaire.