Gen Tec

Gen-TecL-Tyrosine

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Gen-Tec Pure L-Tyrosine is a single-ingredient amino acid powder. Gen-Tec Nutraceuticals sources, blends and packs pharmaceutical grade L-tyrosine, and that is the only thing in the tub: no flavours, sweeteners, colours or fillers. It comes as the 150 g tub, which holds 375 serves of 400 mg. Every 400 mg serve is 400 mg of L-tyrosine. Tyrosine turns up in most focus and pre-workout blends, and the point of the plain powder is control: it goes into a drink at whatever amount suits, with nothing else riding along.

Product Strengths

Added to a pre-workout drink at whatever amount suits.
150 g tub, 375 serves, 400 mg per serve.
400 mg of pharmaceutical grade L-tyrosine per serve, and nothing else.
Unflavoured, with no carbohydrate, fat, sugar or sodium.
No ingredients of animal origin; Gen-Tec sells it in its vegan range.
Made in Australia from local and imported ingredients.

Suitable For / Not Suitable For

Suitable for: Vegans and vegetarians; Active adults and athletes.

Not suitable for: Anyone with an allergy to the listed ingredients; Pregnant or breastfeeding women, unless advised by a health professional; Children under 15 years of age, and pregnant women, except under medical or dietetic supervision.

Nutrition Information

Servings per container: 375. Serving size: 400 mg.

Average quantity	Per 400 mg serve	Per 100 g
Energy	6.8 kJ (1.6 Cal)	1700 kJ (400 Cal)
Protein	0.4 g	100 g
Fat, total	0 g	0 g
- Saturated	0 g	0 g
Carbohydrate, total	0 g	0 g
- Sugars	0 g	0 g
Sodium	0 mg	0 mg
Potassium	0 mg	0 mg
L-Tyrosine	400 mg	100 g

Ingredients

Pharmaceutical grade L-tyrosine, 100%. No flavours, sweeteners, colours, anticaking agents or fillers are declared.

Allergens

Gen-Tec declares: may contain traces of milk, soybeans, cereals containing gluten, tree nuts, sesame seeds and their products. Always review label for full list of ingredients.

Suggested Use

Mix 400 mg, which is about one eighth of a teaspoon, in 150 mL of water. The label directs use 20 minutes before exercise or during periods of prolonged concentration. Because the serve is small, measure it carefully.

Warnings

Not suitable for children under 15 years of age or pregnant women. Should only be used under medical or dietetic supervision.

Cost Per Serve

Pack size	150 g (375 serves of 400 mg)
Serving size	400 mg (about an eighth of a teaspoon)
Serves per pack	375
Price	$35.96
Cost per serve	$0.10

Cost per serve is approximate and based on the current price.

Storage

Store in a cool, dry, dark place.

Disclaimer

Formulated supplementary sports food. This product is not a sole source of nutrition and should be consumed in conjunction with a nutritious diet and an appropriate physical training or exercise program. Not suitable for children under 15 years of age or pregnant women. Should only be used under medical or dietetic supervision. Always read the label and follow the directions for use.

Ingredients

Pharmaceutical grade L-TYROSINE.

Suggested dose

Mix 400mg (1/8 tsp) of L-TYROSINE in 150mL water and consume 20 minutes before exercise or during periods of prolonged concentration. Store in a cool, dry, dark place.

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L-Tyrosine

What does L-tyrosine do?

Tyrosine is the amino acid your body uses to make dopamine and adrenaline. It's been studied in people doing hard mental work under pressure, so save it for the days that ask more of you.

Christina Hanley, BHSc (Nutritional Medicine), Digital Experience & Content Manager, Mr Vitamins

Christina HanleyBHSc (Nutritional Medicine), Digital Experience & Content Manager
Checked this page October 2026

See what we checked

Is L-Tyrosine right for you?

Our naturopaths talk tyrosine through with people every week, and the useful question in store is usually when you'd take it, not whether.

A good fit if

You have a demanding stretch coming up and want your thinking to hold up through it
You're choosing between focus or pre-workout products and want the one ingredient with trial doses behind it
You're happy to take it before the hard days rather than every day

Check with us first if

You take thyroid medicine, like levothyroxine or liothyronine. Tyrosine is a building block for thyroid hormone and may change how much your body has.
You have liver problems. This is a group that needs extra care.
You're pregnant. Its effect in pregnancy isn't known either way.
You're breastfeeding. Tyrosine passes into breast milk, and there isn't enough research on what that means.
If you take prescription medicines, check with your doctor, pharmacist or our naturopaths before starting.

How the forms compare

L-tyrosine, free form. Best known for: The form used in the trials, usually as a single 2 g dose. Absorption: Blood levels peak about an hour after a dose, which is when trials tested. Typical use: Taken before a demanding task, or daily through a short, tough stretch.
N-acetyl-L-tyrosine (NALT). Best known for: A modified, more water-soluble form sold in some sports products. Absorption: We found no human trial comparing it head to head with free tyrosine, so 'better absorbed' is unproven. Typical use: We haven't checked its Australian Schedule 1 status.
Tyrosine in protein foods. Best known for: Where most people's tyrosine comes from, along with what the body makes from phenylalanine. Absorption: It comes mixed with other amino acids, so it isn't comparable to a single dose. Typical use: Everyday eating. We don't give amounts per serve here.

Common questions

Will tyrosine help me focus?

It depends on when you need it. The trials that found a benefit were all done under pressure: a hard memory task, or cadets deep in a combat training course. None of the trials we've seen showed a benefit in people who were already rested and calm. The review that brought 14 trials together only gave it a weak recommendation, so it's promising rather than proven.

How much tyrosine do people take, and when?

Most trials used a single 2 g dose, taken about an hour before the demanding task, because that's roughly when blood levels peak. One trial in military cadets gave a tyrosine drink through the day over a six-day course. Lower doses haven't been tested in the trials we've reviewed, so follow your product's label.

Is tyrosine the same as tyramine?

No, and they're easy to mix up. Tyramine is a different compound found in aged cheese, cured meats and fermented foods, and it's the one behind the well-known food warnings for people on MAOI antidepressants. Tyrosine is the amino acid it's made from. Tyrosine has its own MAOI caution too, so check with your doctor either way.

How much, and when

Reference values. There aren't any. Tyrosine isn't classed as an essential amino acid, so the NHMRC Nutrient Reference Values set no recommended intake for it.

Typical supplemental range. Most trials used a single 2 g dose, taken about an hour before the demanding task. One trial in military cadets gave five daily doses of a drink containing 2 g of tyrosine over a six-day course. Lower doses haven't been tested in the trials we've reviewed, so follow your product's label.

Upper level. None has been set. We found no tolerable upper intake level, and Australia's permitted ingredients list (Schedule 1) has no dose cap for tyrosine. That's a lack of data, not a confirmed safe limit.

Worth knowing. What you need depends on your age, diet and health, so talk to one of our naturopaths.

Food sources

Food first, where the diet allows it.

Cheese and other dairy: tyrosine takes its name from the Greek word for cheese. No verified per-serve figure held
Meat, poultry and fish: present in all of them. No verified per-serve figure held
Eggs: present. No verified per-serve figure held
Soy, legumes, nuts and seeds: the main plant sources. No verified per-serve figure held

Before you start

If any of these sound like you, talk to one of our naturopaths or your doctor before you start.

MAOI antidepressants, including within about two weeks of stopping one. Don't take it without medical advice.
Thyroid medicine (levothyroxine, liothyronine). It may change thyroid hormone levels, so talk to your prescriber.
Pregnancy. Its effect hasn't been established, so take care.
Breastfeeding. It passes into breast milk, and there isn't enough research.
Liver problems. Take care.
Allergy. A rare but serious allergic reaction is possible.
If you take prescription medicines, check with your doctor, pharmacist or our naturopaths before you start.

The evidence, and its limits

A 2015 review of 14 controlled trials gave tyrosine a weak recommendation for thinking under stress. (DOI record)
The same review called the evidence too thin for confident recommendations, and found too little on physical performance. (DOI record)
In 22 young adults, one 2 g dose cut errors on a hard memory task from 10.9% to 6.7%. (DOI record)
Cadets on a week-long combat course did better on memory and tracking tasks than a group given a carbohydrate drink. (PubMed 10230711)
Not everyone responds the same way: one trial found the effect depended on a person's DRD2 gene type. (DOI record)

How it works

Think of tyrosine as stock on a shelf. Your body uses it to make the chemical messengers dopamine, noradrenaline and adrenaline, and the idea behind taking it is that having more on hand keeps them coming when you're under pressure. That's the theory, though, and none of the trials measured brain levels directly. What they measured was performance. People doing a hard memory task, and cadets partway through a tough military training week, did better on tyrosine than on a placebo. On an easier task, or on an ordinary rested day, there was no difference. Tyrosine also feeds thyroid hormone production, which is why it matters if you take thyroid medicine.

The Australian rules

Tyrosine is allowed in Australian listed (AUST L) medicines. It's item 5079 on Australia's permitted ingredients list (Schedule 1, Determination No. 2 of 2026), listed as tyrosine. There's no separate entry for L-tyrosine; Schedule 1 uses the plain amino acid name, and L-tyrosine is the natural form. No requirements, warnings, dose cap or limits on how it's taken are recorded against it. That means the record shows none, not that no limit could ever apply. Listed products can use set wording about mental alertness, thinking and mental fatigue. Being allowed isn't the government endorsing any product.

Read the instrument: Schedule 1, item 5079.

Not sure this is the right form for you? Ask one of our naturopaths. It is free and takes 10 minutes.

Always read the label and follow the directions for use. General information only, and not a substitute for advice from your doctor or one of our naturopaths.

Gen-TecL-Tyrosine

Shipping

Click & Collect

Consult

Terms and Conditions

Description

Product Strengths

Suitable For / Not Suitable For

Nutrition Information

Ingredients

Allergens

Suggested Use

Warnings

Cost Per Serve

Storage

Disclaimer

ingredients

suggested dose

Product Strengths

Suitable For / Not Suitable For

Nutrition Information

Ingredients

Allergens

Suggested Use

Warnings

Cost Per Serve

Storage

Disclaimer

Ingredients

Suggested dose

What does L-tyrosine do?

Is L-Tyrosine right for you?

Will tyrosine help me focus?

How much tyrosine do people take, and when?

Is tyrosine the same as tyramine?

How much, and when

Before you start

The evidence, and its limits

Reviews and Q&A