IO Genix IO Burner

What is IO Genix's IO Burner?

IO Burner is a thermogenic complex in vegetable capsules. One capsule, which is the complete daily dose, brings 200 mg of caffeine, 20 mg of p-synephrine, 200 mg of green tea extract including 100 mg of EGCG, 25 µg of chromium and 0.56 mg of phenylcapsaicin. Six actives, every one of them stated to the milligram.

This is a stimulant product, and it should be called by its name in the first line. The 200 mg of caffeine per capsule correspond to about two espressos swallowed in one go. It is not a harmless supplement you add absent-mindedly to a routine: it is the most loaded product in this whole aisle, and it needs to be read before it is bought.

The formula combines three sources of caffeine — anhydrous caffeine, green tea and guarana — a bitter orange extract standardised in synephrine, a derivative of chilli capsaicin and a trace element. The rest of the Spanish range is in our IO Genix aisle, and the other references in the category in our fat burner capsules aisle.

What does one IO Burner capsule contain?

This table is the product's best argument, and not for the reason you might think. What sets it apart is not the strength of its formula, it is the fact that every active is detailed down to the second decimal place, caffeine content broken down by source included. Many fat burners announce a "thermogenic complex" without giving a single milligram, which makes any comparison impossible. Here, you know exactly what you are swallowing.

200 mg of caffeine is the benchmark to keep in mind. EFSA considers that single intakes of 200 mg of caffeine do not raise safety concerns for a healthy adult. You are therefore at exactly that level, in one capsule. That is also what explains the manufacturer's instruction: never on an empty stomach, never two capsules, and pay attention to everything else you drink during the day.

Only one ingredient in this formula has authorised claims in Europe: chromium, which contributes to the maintenance of normal blood glucose levels and to normal macronutrient metabolism. At 25 µg, or 62 % of the reference value, the threshold is met. For all the others — caffeine, synephrine, green tea, EGCG, guarana, phenylcapsaicin — no health claim is authorised, neither on fat burning, nor on metabolism, nor on thermogenesis. The term "fat burner" here is a commercial category name, not a promise of effect, and we will not make it say any more than that.

Missing from the manufacturer's file: the number of capsules per bottle is not communicated. We will not infer it; it appears on the packaging.

Ingredients list

Dry fruit extract of Citrus aurantium L. standardised to 6 % synephrine, green tea leaf extract (Camellia sinensis O. Ktze) standardised to 50 % EGCG, vegetable capsule (hydroxypropyl methylcellulose), anhydrous caffeine, dry guarana seed extract (Paullinia cupana) standardised to 22 % caffeine, anti-caking agents (magnesium silicate, magnesium salts of fatty acids), AXIVITE microencapsulated phenylcapsaicin (cellulose, modified maize starch, phenylcapsaicin 1 %, anthocyanins, water), chromium picolinate.

May contain traces of GLUTEN (wheat and oats), NUTS, PEANUTS, EGGS, MILK, FISH, SULPHITES and SOYA. The capsule is vegetable: the product is suitable for vegetarian and vegan diets.

How do you take IO Burner?

Dose: 1 capsule, and one only. Liquid: a large glass of water. Timing: before the session on training days, during the morning on rest days. Frequency: one intake a day, never two. Duration: the manufacturer sets no course length; taking a regular break remains good practice with a caffeinated product.

"Never on an empty stomach" is the most important instruction on this page, and the manufacturer writes it out in full. 200 mg of caffeine and a bitter orange extract in an empty stomach is the recipe for palpitations, nausea and feeling faint at the start of a session. Take the capsule with a meal or a snack, without exception.

The second point is stacking, and it is the one people forget. Count everything you consume during the day: a coffee in the morning, a tea in the afternoon, a pre-workout before the session, an energy drink at the end of the day. Added to this capsule, you very quickly go past what is comfortable. The manufacturer also asks that you do not consume other green tea products on the same day, and points out that daily EGCG intake should not reach 800 mg.

Do not take it late in the day. Caffeine has a half-life of several hours: a capsule taken at five in the afternoon is still felt at bedtime, and degraded sleep cancels out everything you were trying to achieve.

If you are sensitive to stimulants or have never taken this type of product, caution says to start differently. A stimulant-free fat burner lets you gauge your tolerance without landing on 200 mg on day one.

Who is IO Burner for, and who is it not for?

It is aimed at a healthy adult, used to caffeine, engaged in a calorie deficit and regular physical activity. It is a support product, in a setting where the diet is already doing the work.

The list of exclusions is long, and the manufacturer sets it out itself in unusually firm terms. The product is strictly not recommended for children, for adolescents under 18, or for pregnant or breastfeeding women. It requires a medical consultation in case of concurrent medication. Two ceilings are restated: daily EGCG intake must not reach 800 mg, and phenylcapsaicin from supplements is limited to 2.5 mg per day.

One point deserves to be known and is rarely mentioned: ANSES, the French food safety agency, has called for vigilance over supplements containing synephrine, particularly when it is combined with caffeine and consumed alongside intense physical exercise. This product combines precisely those two. That is not a reason to give up if you are in good health and stick to the dose; it is a reason not to improvise, never to double the intake, and to abstain in case of cardiovascular disorder, high blood pressure or ongoing treatment.

The capsule is vegetable, which makes the product compatible with vegetarian and vegan diets — an exception in this range. It may contain traces of gluten, nuts, peanuts, eggs, milk, fish, sulphites and soya.

What not to expect from it: this product does not make you lose weight. No capsule creates a calorie deficit, and no weight-loss claim is authorised for its ingredients. What you will feel is the effect of 200 mg of caffeine: alertness and a sense of energy. That is real, it is useful for getting through a session during a period of restriction, and it replaces neither the plate nor the training, as our weight loss aisle points out.

Fat burner with or without caffeine: how to choose

This is the only trade-off that really matters in this aisle, and it depends not on your goal but on your day.

A caffeinated fat burner like this one has a noticeable effect: alertness, energy, appetite often somewhat blunted. That feeling is what explains its success, and it is real. It suits you if you drink little coffee otherwise, if you train in the morning or early afternoon, and if you tolerate stimulants well.

A caffeine-free fat burner is not felt. It becomes the obvious choice if you already drink three coffees a day, if you train in the evening, if your sleep is fragile, or if stimulants give you palpitations. It is not a lesser product: it is the right product for a different context.

Finally, watch out for a very common overlap: most pre-workout boosters also contain 150 to 300 mg of caffeine. Taking both on the same day means doubling the dose without realising it. If your booster is already caffeinated, choose a caffeine-free booster or give up one of the two. And check for chromium in your other supplements, since this capsule already brings 62 % of the daily reference.

Frequently asked questions

How much caffeine is in one capsule?

200 mg in total, split between 162 mg of anhydrous caffeine, 22 mg from guarana and 16 mg from green tea. That is the equivalent of about two espressos swallowed at once. EFSA considers that single intakes of 200 mg do not raise concerns for a healthy adult.

Why should it never be taken on an empty stomach?

Because the manufacturer writes it explicitly, and because such a load of caffeine and bitter orange extract in an empty stomach frequently causes nausea, palpitations or faintness. Always take it with a meal or a snack.

Does this product make you lose weight?

No, and no weight-loss claim is authorised in Europe for its ingredients. Only chromium has claims, covering the maintenance of normal blood glucose levels and macronutrient metabolism. The rest is a stimulant that accompanies an effort, without ever replacing it.

Can it be combined with a pre-workout?

That is the overlap to avoid. Most pre-workouts already contain 150 to 300 mg of caffeine: added to the 200 mg in this capsule, you reach levels that are no longer comfortable at all. Choose one or the other, or switch to a caffeine-free version.

Is it suitable for vegetarians?

Yes. The capsule is vegetable, made of hydroxypropyl methylcellulose, and no ingredient in the formula is of animal origin. It is one of the few products in this range in that position, most using gelatine.

What does ANSES say about synephrine?

The agency has called for caution regarding supplements containing synephrine, particularly when it is combined with caffeine and consumed during intense physical exercise. This product combines precisely those two: stick strictly to the dose and abstain in case of cardiovascular disorder.

What time of day should it be taken?

Before the session on training days, during the morning on rest days. Never late in the day: caffeine stays active for several hours, and degraded sleep cancels the benefit you were seeking during a calorie deficit.

Where to buy IO Genix IO Burner

The bottle can be ordered from this page, and we ship throughout France and Europe. In the Vendargues shop, about ten minutes from Montpellier, this is the product we talk about the longest: the first question is never the customer's goal, but how many coffees they drink in a day. The answer is often enough to decide between this one and a caffeine-free version. The rest of the aisle can be browsed in our sports nutrition section.