IO Genix Citrulline Malate

What is IO Genix Citrulline Malate?

IO Genix Citrulline Malate is a single-ingredient powder. One 3.8 g scoop provides 3,762 mg of citrulline D,L-malate, and the only other component is an anti-caking agent. The tub holds 79 servings, which comes to nearly three months of use at three sessions a week.

Citrulline is a non-proteinogenic amino acid, meaning it is not used to build proteins. It is found in meaningful amounts in only one everyday food: watermelon, from which it takes its name, Citrullus. You would have to eat several kilos of it to come near the dose in one scoop.

The malate form pairs citrulline with malic acid, a molecule naturally present in apples and involved in the Krebs cycle. This pairing is the most widespread one in pre-workout products. The rest of the Spanish range is in our IO Genix section, and the other products in the category in our citrulline section.

What does one serving of Citrulline Malate contain?

3,762 mg in a 3.8 g serving means the product is more than 99% citrulline malate. There is practically nothing else in the tub, and that is the main argument for this format: you are buying an active ingredient, not a blend in which it is buried. Compare that with a full pre-workout, where citrulline often heads the ingredients list but at 1 g or 1.5 g, with nothing to make that clear.

One piece of data is missing from the manufacturer's file and it matters: the ratio between citrulline and malate is not published. Products on the market are split between 1:1 and 2:1 ratios, so the amount of citrulline actually supplied is not the same from one tub to another at equal weight. We will not decide this in the manufacturer's place. The label on the tub you receive is the only reference if this point is decisive for you.

The dose also deserves an honest framing. 3.8 g per serving is a middling dose: many pre-workout formulas dose citrulline malate at between 6 and 8 g per serving. The manufacturer here allows for a single serving a day and asks that it not be exceeded, which is the instruction to follow. If you were after a higher dose, this is not the product that will give it to you, and we would rather say so before the purchase.

On the regulatory side: no health claim is authorised in Europe for citrulline or for citrulline malate. Not on pump, not on endurance, not on recovery, not on fatigue. An earlier version of this page announced a specific figure for an increase in the number of repetitions: that percentage could not be sourced as it stood and it has been removed.

Ingredients list

Citrulline D,L-malate, anti-caking agent (silicon dioxide).

May contain traces of GLUTEN (wheat and oats), EGGS, MILK, FISH and SOYA.

How do you take Citrulline Malate?

Dose: 3.8 g, that is one measuring scoop. Liquid: 100 to 150 ml of cold water. Timing: 30 to 45 minutes before training, preferably on an empty stomach. Frequency: one serving a day, on training days. Duration: a continuous cycle of 8 to 12 weeks according to the manufacturer.

The volume of liquid is deliberately small here, between 100 and 150 ml. This is not a mistake: citrulline malate is decidedly sour and bitter, and diluting it further does not improve matters, it simply draws out the unpleasantness. A small amount swallowed in one go goes down better than a large glass sipped slowly.

If the taste puts you off, mix it into a juice or an already flavoured drink. In practice the most common mix remains adding it to a pre-workout booster or to a beta-alanine powder, in the same glass: the two are taken at the same moment and for complementary reasons.

Thirty to forty-five minutes before the session, on a light stomach, is the window the manufacturer has settled on. A full meal just beforehand slows absorption without preventing it: that is not a safety issue, only a question of effectiveness.

The manufacturer speaks of continuous cycles of 8 to 12 weeks. Note that 79 servings work out at about six months if you train three times a week: one tub therefore comfortably covers two full cycles. Shake vigorously; the powder dissolves well but forms clumps if you merely stir it.

A word on what to watch over those weeks, because this product is not judged on how it feels straight away. Note instead the number of repetitions you hold on your longer sets and the way you recover between two sets: these are the only usable indicators, and they call for a training log rather than an impression. Without that record, you will have no way of knowing whether the next tub is worth it.

Who is citrulline malate for, and who is it not for?

It appeals to the strength trainee who puts together their own pre-workout and wants to choose every ingredient and every dose. It also appeals to those who cannot tolerate stimulants: this is a caffeine-free powder, so it can be used in the evening without any effect on sleep, unlike a full pre-workout booster.

The manufacturer advises against it for pregnant and breastfeeding women and rules it out for minors under 18. It asks that you consult a healthcare professional in the event of cardiovascular disorders or medical treatment. This last precaution deserves to be understood rather than copied out: citrulline acts on a pathway that touches the regulation of blood vessel diameter, and combining it with a treatment that acts on blood pressure is not a trivial matter. If this applies to you, put the question to your doctor.

The product may contain traces of gluten, eggs, milk, fish and soya. No ingredient of animal origin appears in the list, however.

What not to expect from it: this is not a stimulant, you will feel neither energy nor alertness. Nor is it a mass-gain or a weight-loss product. And if you are expecting a spectacular pump from the very first session, disappointment is likely: this is a background ingredient, not a piece of showmanship. Lastly, this kind of product never makes up for a badly built session or a diet that does not keep up.

Citrulline malate or pure L-citrulline?

The question comes up as soon as you compare two tubs on the shelf, and it has a clear answer.

Pure L-citrulline contains only the amino acid. At equal weight it therefore supplies more citrulline than a malate form, where part of the weight goes to malic acid. If citrulline is your only objective, that is the most direct form and the easiest to calculate.

Citrulline malate adds malic acid, which is not a mere carrier: it is an intermediate in the Krebs cycle, the cell's central energy production pathway. It is the form most used in pre-workout products, and it is the one in this tub. It is also often cheaper per total gram.

If blood flow is what interests you, be aware that L-arginine is another possible route but a less effective one taken orally: it is largely broken down before reaching the circulation, whereas citrulline escapes that first pass and is then converted into arginine. And if you want a product you can feel during the session, it is the full pre-workout formulas you should be looking at, not this powder.

Frequently asked questions

What is the citrulline to malate ratio?

The manufacturer does not publish it, and we will not guess it. Products on the market are split between 1:1 and 2:1, which changes the amount of citrulline actually supplied at equal weight. If this point is decisive for you, the label on the tub you receive is the only reliable source.

Why only 100 to 150 ml of water?

Because the powder is sour and bitter: diluting it further does not make it any better, it simply makes the unpleasantness last longer. A small amount swallowed quickly is the most comfortable solution, or a mix into a juice if the taste really bothers you.

Should it be taken on rest days?

The manufacturer allows for a serving on training days only. Unlike creatine or beta-alanine, this product is not meant to build up stores: it is taken with a specific session in view. On days without training, there is nothing to maintain.

Does it contain caffeine?

None at all. The powder contains only citrulline malate and an anti-caking agent. That is what makes it usable for an evening session without disturbing sleep, and combinable with a caffeinated pre-workout booster if you already take one.

How many servings in a tub?

79 servings of 3.8 g, measuring scoop included. At three sessions a week, that comes to about six months of use, so easily enough to run the two 8 to 12 week cycles the manufacturer suggests.

Can it be mixed with creatine?

Yes, in the same glass and with no known interaction. Creatine monohydrate and citrulline are readily taken at the same moment and do not act in the same place. Just check, if you already use a full pre-workout, that it does not itself contain citrulline: stacking the two poses no danger, but it can take you past the intended daily dose.

Is it suitable for vegans?

No ingredient of animal origin appears in the list, which is limited to citrulline malate and a mineral anti-caking agent. The manufacturer does not, however, claim a vegan status, and the product may contain traces of milk, eggs and fish linked to the production facility.

Where can you buy IO Genix Citrulline Malate?

The 79-serving tub can be ordered from this page, and we ship throughout France and Europe. At the Vendargues shop, about ten minutes from Montpellier, this is the product we suggest to people who come in looking for a pre-workout booster and actually describe a pump problem to us, not a lack of energy: the two needs do not call for the same tub. The rest of the range can be browsed in our sports nutrition section.