Collagen

What is collagen, and why is it taken hydrolyzed?

Collagen is the most abundant protein in the human body: about one-third of total protein mass. It is a structural protein, organized in a triple helix, present in the skin, bones, tendons, ligaments, cartilage, and vessel walls. Its composition is unique: about one-third glycine, a lot of proline and hydroxyproline — the latter existing nowhere else in quantity, it serves as a collagen marker.

Native collagen is a very large molecule, around 300,000 daltons: at this size, it cannot cross the intestinal wall. This is the whole reason for hydrolyzed collagen, or collagen peptides: enzymatic hydrolysis breaks down the protein into fragments of a few thousand daltons, down to di- and tripeptides. These fragments are small enough to be absorbed, and characteristic dipeptides like prolyl-hydroxyproline are found in the plasma after ingestion.

Three forms circulate: native collagen from food; gelatin, denatured by heat, which gels upon cooling; and hydrolysate, which no longer gels and dissolves in cold water. If your powder sets in the shaker, it's not hydrolysate.

Collagen type I, II or III: what do these numbers mean?

There are about thirty types of collagen; three concern supplements.

Type I is by far the most widespread: it constitutes the essential collagen of the skin, bones, tendons, and ligaments, and is what marine collagens provide, as well as the majority of bovine collagens.

Type II is the collagen of articular cartilage, almost always sourced from chicken sternum. It exists in two forms: hydrolyzed, at doses of several grams, or undenatured, around 40 mg per day. Seeing 40 mg and 10 g side by side on two labels is not aberrant: they are neither the same ingredients nor the same dosing logics.

Type III accompanies type I in the skin, vessels, and hollow organs; it is not found isolated. A product announcing "types I, II, III, and V" therefore combines several animal sources in the same pot — neither a guarantee of quality nor a defect, but a choice that makes the dosage of each type less clear.

Marine or bovine collagen: which to choose?

Marine collagen, extracted from fish skin and scales, is almost exclusively type I. Its peptides often have a slightly lower molecular weight than those from beef: this is the usual commercial argument, but between two well-manufactured hydrolysates, the practical difference remains modest. It is, however, an allergen, to be avoided in case of fish allergy. The taste ranges from neutral to slightly iodized depending on deodorization: this is the main criticism of powdered marine collagen.

Bovine collagen, derived from hides and bones, provides type I and type III, with a more neutral taste and a lower cost per gram. The mentions "grass fed" refer to the animals' diet, not to a property of the peptide: they say something about the supply chain, nothing about the biochemistry.

Neither is plant-based, and "plant-based collagen" does not exist: products sold under this name combine vitamin C, zinc, and free amino acids, without a single collagen molecule. Vegetarian or vegan, know that our plant proteins meet a protein need, but not this one.

What can truly be stated about collagen?

This is the most important point on this page, and the one where almost the entire market is in violation. No health claim is allowed in Europe for collagen: none has passed EFSA's evaluation. It is forbidden to write that collagen improves skin, repairs joints, strengthens hair or nails, slows aging, or relieves pain. We will not write it — and any brand that does should alert you to the rest of its claims.

What can be said is brief, and already useful. Collagen is a perfectly identified structural protein; its hydrolyzed peptides are absorbed, and this can be measured; they provide an abundance of the amino acids the body uses to make its own collagen — glycine, proline, lysine. Research is active, and some patented ingredients are the subject of publications, but EFSA has not validated any claims to date.

Practical consequence: a supplement is not a treatment. Persistent joint pain, waking you at night, or accompanied by swelling requires medical advice, not a tub of powder — just like unusual hair loss. Consult a doctor first; the supplement will come later, if it has a place.

Why is vitamin C essential for collagen?

This is the only area where European regulations allow a claim, and it is valuable: "Vitamin C contributes to normal collagen formation for the normal function of skin, bones, cartilage, gums, teeth, and blood vessels." Note the exact scope: it concerns vitamin C, not ingested collagen.

The mechanism is well described: collagen synthesis involves the hydroxylation of proline and lysine, for which enzymes require vitamin C as a cofactor. Without it, the triple helix does not stabilize — this is the mechanism of scurvy. A massive dose does not produce more; sufficient intake is a necessary condition, not a lever.

The claim becomes usable from 12 mg of vitamin C per serving, or 15% of the reference nutritional values, set at 80 mg. Many collagen powders already contain it; otherwise, a separate vitamin C resolves the issue for a few cents a day. Of all that is sold around collagen, this is the only association that is both documented and recognized.

Can collagen replace whey?

No, and this is a common mistake. Collagen is an incomplete protein: it contains no tryptophan and its essential amino acid content is low. Its leucine — the amino acid that triggers muscle protein synthesis — peaks at a few percent, compared to about 10% in whey isolate.

On a label, 10g of collagen still appears as 10g of protein: accurate in terms of nitrogen measurement, misleading in terms of use. For daily intake or recovery, use our proteins, whey concentrate, caseins, or EAAs. Collagen is taken in addition, never instead.

What dose, in what form, for how long?

The protocols published on hydrolyzed collagen peptides most often use 2.5 g to 10 g per day, in a single dose. Patented ingredients on labels — FORTIGEL, VERISOL and their equivalents — are specific hydrolysates for which the manufacturer indicates the dose, often 2.5 g; generics are typically dosed around 10 g. Follow the manufacturer's dose rather than replicating that of another product.

Powder is almost always the right choice: at 10 g per day, a 500 mg capsule would require twenty daily doses. Capsules are only justified for low dosages, especially undenatured type II. Hydrolysate dissolves in cold water, coffee, or yogurt without thickening; heat does not degrade it.

Taste is the primary reason for abandonment: poorly deodorized marine collagen leaves a fishy note in plain water, which hot coffee or citrus juice can correct. The time of intake has no demonstrated importance; only regularity counts. Study durations range from a minimum of 8 to 12 weeks: judging a product after ten days makes no sense.

Frequently Asked Questions

What is collagen?

The most abundant protein in the human body, accounting for about one-third of total protein mass. It is a structural protein: it forms the framework of skin, bones, tendons, ligaments, cartilage, and blood vessel walls. Its unique characteristic is its composition, rich in glycine, proline, and hydroxyproline. In supplements, it is found in hydrolyzed form, meaning it is broken down into peptides small enough to be absorbed.

What are the benefits of collagen?

This needs a two-part answer, and the first is legal: no health claim for collagen is authorized in Europe. None has passed EFSA's evaluation. Therefore, it is forbidden—for us as for any seller—to claim that it acts on skin, joints, hair, nails, or aging. The second part is factual: hydrolyzed peptides are indeed absorbed, they are found in plasma, and they provide an abundance of glycine, proline, and lysine that the body uses to produce its own collagen. Research is active, several patented ingredients are the subject of publications, but none of this has led to regulatory recognition. It is with full knowledge that one takes it, not on the basis of a promise.

Does collagen work on the skin?

This is the most frequently asked question in the category, and the answer is the same as above: no "skin" claim is authorized for ingested collagen. The only legal claim on the subject concerns vitamin C, which contributes to normal collagen formation for the normal function of the skin. What is established is that the skin is largely made of type I collagen, and that this collagen degrades with age, smoking, and unprotected sun exposure. Of these three factors, sun protection and quitting smoking have a documented effect that no supplement can match.

Does collagen lighten skin?

No, and there is no data to suggest it. This idea circulates mainly around products sold outside Europe that combine collagen with depigmenting agents — it is to these latter that the desired effect is attributed, not to collagen, and some of them are banned in the European Union because they are dangerous. Hydrolyzed collagen legally sold in France is a food protein: it has no effect on pigmentation. Be wary of imported products that promise this.

What is the origin of collagen, and who makes it?

Two answers, depending on what is meant by that. In the body, it is made by your own cells: fibroblasts for skin, tendons, and ligaments; chondrocytes for cartilage; osteoblasts for bone. They assemble amino acids into chains, then into a triple helix, with vitamin C as an essential cofactor. In a supplement jar, the origin is always animal: fish skins and scales for marine, bovine skins and bones for bovine, chicken sternum for type II. There is no plant-based or synthetic collagen in this market.

How to produce collagen naturally?

Your body continuously produces it itself, from amino acids — glycine, proline, lysine — and vitamin C, which acts as a cofactor for synthesis enzymes. Three conditions favor it, and none is a supplement: sufficient protein intake throughout the day, adequate vitamin C intake, and limiting factors that degrade existing collagen — primarily smoking and unprotected sun exposure. Nothing you swallow directly becomes the collagen in your skin: the body makes its own.

How to take collagen, when and at what dose?

The timing has no proven importance: morning, evening, on an empty stomach or with a meal, only regularity matters. Published protocols most often use 2.5 g to 10 g of hydrolyzed peptides per day, in a single dose, diluted in cold water, coffee, or yogurt. Follow the dose indicated by the manufacturer: a patented ingredient is often dosed around 2.5 g, a generic hydrolysate rather around 10 g. In terms of duration, studies run for at least 8 to 12 weeks, and there's no need for breaks: the question is budgetary.

What are the dangers of collagen?

There are no identified dangers at usual doses in healthy adults: it is a food protein, generally well tolerated. The most frequent complaints are digestive and benign—heaviness, bloating, aftertaste. Two real points of vigilance: fish allergy contraindicates marine collagen, and a high protein intake requires medical advice in cases of kidney failure, pregnancy, breastfeeding, or long-term treatment. The real risk in this market is not health-related, it is commercial: paying a lot for promises that no European claim authorizes.

What foods are rich in collagen?

Animal connective tissues: pork rinds, veal feet, hock, chicken wings with skin, whole fish with their skin, and long-simmered bone broths, which release it in the form of gelatin. No plant-based food contains it. Two limitations: you will never know how many grams you consumed, and this gelatin is not hydrolyzed, so it's less directly absorbable than peptides.

Why take collagen?

The honest answer is two-fold. No health claim is authorized in Europe for collagen: therefore, we cannot tell you that it acts on skin, joints, hair, or nails, and no seller can legally do so. What is established, however, is that hydrolyzed peptides are absorbed, and that they provide an abundance of glycine, proline, and lysine that the body uses to produce its own collagen. Many people take it on this basis, with full knowledge. If your motivation is an established pain or discomfort, talk to a doctor first.

What is the best collagen to take?

The one whose label shows a real dose of peptides per serving, an identified origin, and a short ingredient list. Specifically: check the grams of peptides per dose and not the weight of the serving, prefer powder over capsules as soon as the dose exceeds 2 or 3 g, and calculate the price per gram of peptides. A patented ingredient provides a documented dose by the manufacturer, a well-dosed generic is cheaper. None benefits from an authorized claim: beware of those who promise them.

Marine or bovine, which is best?

Neither, in absolute terms. Marine if you exclude beef or want pure type I; bovine for types I and III, a more neutral taste, and a lower price per gram. In case of fish allergy, the decision is clear.

What is the difference between collagen and hyaluronic acid?

These are two distinct molecules in connective tissues. Collagen is a fibrous protein: it provides structure and resistance. Hyaluronic acid is a complex sugar, a glycosaminoglycan, which retains water in the matrix. Neither benefits from an authorized oral health claim in Europe, and there is no obligation to combine them: they are often sold together by commercial choice, not physiological necessity.

What are VERISOL and FORTIGEL?

These are ingredient brands, not finished product brands: bovine collagen hydrolysates from the same German manufacturer, with distinct peptide profiles and a recommended dose specific to each, often around 2.5g per day. You will find them mentioned on the label of supplements sold under other names. Their practical interest is traceability: the manufacturer publishes a dose, which avoids improvisation. They do not benefit from any authorized health claim in Europe, like the rest of collagen, and cost more per gram than a generic hydrolysate.

Is collagen cheaper at the pharmacy?

Not necessarily, and comparing advertised prices means nothing here. The only calculation that matters is the price per gram of peptides actually taken each day: a cheap pot dosed at 5g per serving is more expensive than a more expensive pot dosed at 10g. Then multiply by the number of servings in the container and you get a comparable monthly cost from one product to another. Capsule formats are almost always the most expensive at equal doses, as many are needed. We do not publish price comparisons: prices change too often for it to remain accurate.

Can you make collagen at home?

You can obtain it, but not strictly make it. Long cooking of bones, rinds, or veal feet releases gelatin, which is denatured collagen: this is the whole principle of bone broth. A good food otherwise, it never tells you how many grams you consumed, and this gelatin is not hydrolyzed — it remains a large molecule that digestion must break down. No homemade recipe reproduces enzymatic hydrolysis.

Should collagen be combined with vitamin C?

Vitamin C is the only combination whose role is recognized by European regulations: it contributes to normal collagen formation. Twelve milligrams per serving are enough to make the claim usable, and many powders already contain it. Beyond that, joint formulas often combine glucosamine, chondroitin, and MSM. Magnesium, zinc, and omega 3 follow other logics: choose them for themselves.

Does collagen cause weight gain?

No. It's a protein: about 4 kcal per gram. A 10g dose therefore weighs around 40 kcal, the equivalent of half an apple, in a day that counts 2,000 or more; flavored versions rarely add more than ten calories. No known mechanism makes it a product that causes weight gain — or loss. If your weight changes, the answer is in the overall caloric balance; our weight loss section addresses the subject.

Where to buy collagen?

On this page, with shipping throughout France and Europe, or in our store in Vendargues, about ten minutes from Montpellier: pick-up within 2 hours and orders placed before 2 p.m. shipped the same day. Whatever the point of sale — specialized store, pharmacy, organic store, internet — the only thing to check remains the same: the grams of peptides per serving, the origin (marine, bovine, type II) and the length of the ingredient list. This exercise is best done with two jars in hand rather than through a product sheet.

What collagen brands do we offer?

IO Genix offers several approaches: a classic powdered collagen, two versions built around FORTIGEL and VERISOL peptides, and a glucosamine-chondroitin-MSM complex. Nutriting offers a short-composition grass-fed bovine collagen and N-acetylglucosamine. ESN works with bioactive peptides in neutral powder, and Sinob covers both aspects, bioactive collagen and joint complex.

For a joint supplement without collagen, the glucosamine section is the starting point; for the rest, see our multivitamins and our sports nutrition.

Where to ask your questions near Montpellier?

Our store in Vendargues, about ten minutes from Montpellier, allows you to compare labels in hand: it's the best way to see who displays the real dose of peptides per serving and who simply writes "marine collagen" in large letters on the jar. We ship everywhere in France and Europe.

What studies say, what European regulations allow to say about it, and where the limit between the two lies: our article on hydrolyzed collagen details the matter.

Sources: EFSA for health claims, ANSES for French benchmarks on food supplements, Ciqual for nutritional composition.

Sources

• ANSES — Les compléments alimentaires
• Règlement UE n° 432/2012 — allégations de santé autorisées
• Règlement CE n° 1924/2006 — allégations nutritionnelles et de santé

À intégrer dans une alimentation variée et équilibrée et un mode de vie sain.