IO Genix Pure Tyrosine - Premium Dopamine Precursor

What is IO Genix Pure Tyrosine?

IO Genix Pure Tyrosine is a single-ingredient L-tyrosine powder. A 1 g serving delivers 1,000 mg of L-tyrosine at a purity above 99%, with no flavouring, no sweetener and no bulking agent. The tub holds 240 servings, which is more than six months at one serving a day.

Tyrosine is a non-essential amino acid: the body can make it itself, from another amino acid, phenylalanine. Diet supplies it in abundance, through dairy products, meat, fish, eggs, soya and nuts. Cheese is in fact its most emblematic source — the name comes from the Greek tyros, meaning cheese.

Its biochemical role is well established: tyrosine is the starting point for the synthesis of catecholamines, a family of nervous-system messengers. That is a point of biochemistry, documented and uncontested; what supplementation actually produces in an adult is another question, and we come back to it below. The powder is produced by fermentation from plant-based substrates. The rest of the Spanish range can be found in our IO Genix section.

What does a serving of Pure Tyrosine contain?

A purity above 99% and 240 servings in a tub: these are the two figures that define this product. The first means there is practically nothing in there but the amino acid — no bulking agent, no sweetener, no colouring. The second is remarkable: at one serving a day, a tub lasts more than six months; at the maximum dose of 2 g, it still lasts four months.

The powder is produced by biofermentation from plant-based substrates, which makes it suitable for vegetarian and vegan diets. That is a welcome exception in a category largely dominated by gelatine capsules. Its taste is neutral and it dissolves easily in cold water.

On the regulatory side, let us be clear: no health claim is authorised in Europe for L-tyrosine. Not for concentration, not for alertness, not for mood, not for performance, not for the thyroid. Tyrosine's role as a precursor of catecholamines is a point of biochemistry; what oral supplementation produces in a healthy adult has no dossier approved at European level. So we describe the molecule, its dosage and its precautions, and promise nothing.

One statement from the old product page has also been removed: it announced a quantified improvement in bioavailability when taken on an empty stomach. That percentage could not be sourced and it has no place here. The principle of taking it away from protein-rich meals still holds, and we explain it below — without any invented figure.

Ingredients list

Pure L-tyrosine (100%, levorotatory form), produced by fermentation from plant-based substrates. Purity above 99%. No bulking agent, no sweetener, no colouring, no preservative. Suitable for vegetarian and vegan diets.

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

How do you take Pure Tyrosine?

Serving: 1 g, that is one measuring scoop. Liquid: 200 ml of cold water. Timing: in the morning on an empty stomach, 30 minutes before breakfast. Frequency: one to two servings a day, at least six hours apart, without exceeding 2 g. Duration: cycles of 8 to 12 weeks, with a 2 to 4 week break.

Taking it away from protein-rich meals is not a whim, and the mechanism is well understood. To cross the blood-brain barrier, tyrosine uses a transporter it shares with several other amino acids — the same ones found in a steak or a shake. Taken at the same time as a protein intake, it therefore ends up in direct competition with them. The morning, on an empty stomach, is the slot that solves the problem.

The second instruction is more imperative still: do not take the product after 16:00. The manufacturer states this explicitly, and for a common-sense reason: tyrosine can cause restlessness or insomnia in sensitive individuals. An ingredient from the wakefulness-precursor family is taken in the morning, not in the evening.

If you want to add a second serving, leave at least six hours between them and stay under 2 g a day in total. Start with 1 g for a week before going higher: that is the only way to assess your tolerance without ending up with an unexplained headache.

The powder dissolves easily in 200 ml of cold water and its taste is neutral. The manufacturer recommends cycles of 8 to 12 weeks with a 2 to 4 week break — so a 240-serving tub comfortably covers several full cycles.

It combines without overlap with a taurine, citrulline or beta-alanine powder. Do watch out, however, for stacking it with caffeinated boosters: many already contain tyrosine, often without making a point of it.

Who is tyrosine for, and who is it not for?

It appeals to the adult who builds their own routine, ingredient by ingredient, and who prefers a single active at a known dose to an opaque blend. The 240-serving format also makes it one of the longest-lasting products in the catalogue.

One contraindication here is absolute, and it must be read before any other: phenylketonuria. People with this metabolic disorder, along with those allergic to phenylalanine, must not consume this product. This is not a routine precaution, it is a formal exclusion stated by the manufacturer.

The product is also not recommended in cases of hyperthyroidism or cardiovascular disorders. The manufacturer requires medical advice for anyone treated with MAOI or tricyclic antidepressants, and asks that you avoid combining it with dopaminergic medication without medical advice. It further notes that tyrosine may potentiate the effects of thyroid treatments and stimulants. These warnings are serious and specific: if you are on any medication at all, the question goes to your doctor or your pharmacist before you buy.

It is not recommended for children under 12, and pregnant and breastfeeding women should consult a doctor. The manufacturer lists headaches, nausea, restlessness and insomnia if taken late in the day as possible effects, and recommends starting with low doses.

What not to expect from it: this is neither a stimulant, nor a treatment, nor a sports performance product. You will not find the effect of a coffee here. Nor is it a solution to persistent fatigue, to a lack of motivation or to entrenched difficulties with concentration: those situations have causes — sleep, workload, state of health — that are a matter for a doctor and not for a powder.

Tyrosine or a caffeine-free booster?

The two overlap among people looking for something other than a classic stimulant, and they do not work in the same way.

A caffeine-free booster is a complete formula, generally built around citrulline and ingredients acting on blood flow, sometimes with tyrosine among them. It is the simplest choice if you want a ready-to-use product for the session, with nothing to put together yourself.

Tyrosine on its own answers a different logic: a single amino acid, at a known dose, that you place wherever you like in the day — and in the morning in particular, entirely outside any training context. It costs far less per gram and gives you total control over what you take.

Watch out for doubling up, which is the real practical question here: many pre-workouts already contain tyrosine, sometimes at comparable doses. If you use a full pre-workout, read its label again before adding this tub, or you may exceed the 2 g daily limit without realising it.

Frequently asked questions

How many servings are there in a tub?

240 servings of 1 g, with a measuring scoop included. At one serving a day that comes to more than six months; at the maximum dose of 2 g a day, around four months. It is by far the longest-lasting pack size in this range.

Why take it on an empty stomach?

Because tyrosine shares its transporter with other amino acids: taken at the same time as a protein-rich meal or a shake, it competes directly with them. The morning, on an empty stomach, 30 minutes before breakfast, avoids the problem.

Why not take it in the evening?

The manufacturer asks that you avoid taking it after 16:00, because of the risk of restlessness or insomnia in sensitive individuals. That instruction is consistent with the nature of this amino acid: its place is the morning.

Who must absolutely not take it?

People with phenylketonuria and those allergic to phenylalanine: that is a formal exclusion. The product is also not recommended in cases of hyperthyroidism or cardiovascular disorders, and requires medical advice alongside MAOI or tricyclic antidepressants.

Is it suitable for vegans?

Yes. The tyrosine is produced by fermentation from plant-based substrates, the powder has no animal casing and the manufacturer declares it suitable for vegetarian and vegan diets. Traces of milk and eggs remain possible because of the production facility.

Does it have a taste?

The manufacturer describes it as neutral, and the powder dissolves easily in 200 ml of cold water. That is a real advantage over many powdered amino acids, whose bitterness forces you to mask the taste in a juice.

Can it be stacked with a pre-workout?

Check your pre-workout's label first: many already contain tyrosine, sometimes at several hundred milligrams. Stacking them can take you over the 2 g daily limit without your noticing. Adjust the powder dose accordingly.

Where can you buy IO Genix Pure Tyrosine?

The 240-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 a product we ask two questions about before selling it: “are you on any medication?” and “does your pre-workout already contain some?”. The two answers often decide for the customer. The rest of the section can be browsed in our sports nutrition range.