Home › Amino Acid Supplements › L-Tyrosine Powder
Last updated: September 2026
Vegan · Fermented · USP grade · 98.5 to 101.5% assay · Nothing added · 100g to 10kg
L-Tyrosine Powder UK: Vegan Fermented Free-Form Amino Acid, USP Grade, 100g to 10kg
Plain L-tyrosine, made by fermenting corn-derived glucose and crystallised to the USP monograph: assay 98.5% to 101.5%, total impurities under 2%. No flow agents, no bulking agents, no flavour. Weighed and packed to order in Southend-on-Sea, from 100g starter pouches to 10kg trade sacks. Sold on its specification: L-tyrosine has no authorised health claims in the UK and this page makes none.
Seven pack sizes · from £6.99164,000+ verified marketplace sales5 Star Food Hygiene Rating
on orders over £10
before 3:30pm Mon to Fri
unused, sealed packs
3 interest-free instalments on £50+
Quick answer
Charge Products L-Tyrosine Powder is free-form L-tyrosine, a non-essential amino acid, supplied as a plain crystalline powder with nothing added. It is made by fermentation of glucose from corn, is suitable for vegans, and meets the USP specification: identification by infrared, assay 98.5% to 101.5% on a dry basis, specific rotation -9.8° to -11.2°, total impurities no more than 2%, loss on drying no more than 0.3%. Suggested use 500mg to 1,000mg once a day. It does not dissolve in water, which is normal for this amino acid. Available in 100g, 250g, 500g, 1kg, 2kg, 5kg and 10kg. Food supplement, not a medicine. No authorised UK health claims exist for L-tyrosine and none are made.
Key features at a glance
- Free-form L-tyrosine: the L-isomer, confirmed by infrared identification and specific rotation -9.8° to -11.2°
- USP grade: assay 98.5% to 101.5% on a dry basis, the pharmacopoeial standard, not a marketing round number
- Impurity limits declared: total impurities max 2%, any single impurity max 0.5%, chloride and sulphate max 0.04% each, iron max 0.003%
- Vegan and fermented: made from corn-derived glucose by microbial fermentation; no animal input, not GM, not irradiated
- Nothing added: no anti-caking agent, no maltodextrin, no flavouring, no sweetener
- Microbiology and heavy-metal limits on the spec: E. coli and Salmonella negative in 25g; lead max 3ppm, cadmium max 1ppm, mercury max 0.1ppm, arsenic max 1ppm
- Free-flowing: 100% passes 20 mesh, bulk density 0.3 to 0.38g/ml, loss on drying max 0.3%
- Seven pack sizes: 100g, 250g, 500g, 1kg, 2kg, 5kg, 10kg, weighed and packed to order
- UK supplier since 2016: 164,000+ verified marketplace sales, 5 Star Food Hygiene Rating, packed in our own Essex unit
- Wholesale, white label and capsule filling available
On this page
The numbers · What is L-tyrosine? · First-time buyer guide · Fermented vs synthetic · Understanding the powder · Specification · Pack size guide · How to take · Where to buy · Wholesale · Related products · FAQ · References
Food supplement: not a medicine
This product is a food supplement. It is not intended to diagnose, treat, cure or prevent any condition. Food supplements should not replace a varied, balanced diet and a healthy lifestyle.
Do not take L-tyrosine if you take MAOIs, levodopa or thyroid medication
L-tyrosine can interact with monoamine oxidase inhibitor (MAOI) antidepressants, with levodopa and with thyroid hormone medication, and is not advised for anyone with an overactive thyroid or Graves' disease. If you have phenylketonuria (PKU), tyrosine intake is something your metabolic clinic manages, not an over-the-counter powder. Do not take this product in any of these situations unless your doctor has specifically told you to.
Check with your GP first if you
are pregnant or breastfeeding, take any regular medication, or have a medical condition. Not suitable for under 18s. Do not exceed 1,000mg a day unless a health professional has advised otherwise.
Why this page makes no health claims
In Great Britain a supplement seller may only use health claims that are on the official register. L-tyrosine has none. Claims relating tyrosine to mental performance and to the body's response to stress were assessed by EFSA in 2011 and not authorised, because the evidence submitted did not establish a cause-and-effect relationship in the general population. Those opinions stand, and any listing that tells you what tyrosine will do for your focus, mood or energy is not following the rules.
So this page sells the powder on what it is: what it is made from, how pure it is, what the impurity, microbiological and heavy-metal limits are, and how to weigh and take it. If you have decided you want L-tyrosine, this is the specification you are buying.
Cambridge Commodities dossier P2038 · USP specification
The numbers this powder is sold on
98.5–101.5%
assay, dry basis
<2%
total impurities
-9.8° to -11.2°
specific rotation
<0.3%
loss on drying
20 mesh
100% pass
60-18-4
CAS number
These are the specification limits from the supplier's technical dossier, version 5, against which every batch is released. Identification is by infrared spectrum; the rotation figure confirms the L-isomer; the assay range is the USP monograph range. Ash is limited to 0.4%, chloride and sulphate to 0.04% each and iron to 0.003%.
What this is not: a third-party test on the finished pouch. It is the supplier's release specification, and the batch certificate of analysis that comes with each delivery reports the actual results against it. The dossier also notes that surveillance testing means not every parameter is necessarily tested on every batch. We say so because a buyer comparing amino acid powders deserves to know which number came from where.
What is L-tyrosine powder?
L-tyrosine is one of the 20 amino acids that make up the proteins in the body. It is classed as non-essential, meaning a healthy body can make it from another amino acid, phenylalanine, and it is also present in most protein foods: cheese (the name comes from tyros, the Greek for cheese), chicken, turkey, fish, eggs, soya, beans, nuts and seeds. A normal mixed diet supplies several grams a day.
Chemically it is 4-hydroxyphenylalanine, C9H11NO3, molecular weight 181.19, CAS 60-18-4. In the body it is incorporated into protein and also serves as a starting material for a number of other molecules the body makes. That is a description of biochemistry, not a claim about what taking extra will do; see the panel above.
Free-form means the amino acid on its own, not bound into a protein or peptide. L- refers to the isomer: amino acids exist as mirror-image L and D forms, and the L form is the one found in protein and used by the body. The specific rotation test on the specification exists to confirm you are getting the L form.
This product is that single ingredient, as a white crystalline powder, with nothing else in the pouch. It is the same material we use for capsule filling, weighed out for people who prefer to measure their own serving or who want the price per gram that loose powder gives.
First-time buyer guide: what to expect from L-tyrosine powder
It does not dissolve. That is normal.
L-tyrosine is one of the least water-soluble amino acids, at roughly 0.45g per litre at room temperature. A 500mg serving will not dissolve in a glass of water however long you stir. Stir and drink it straight away as a cloudy suspension, or mix it into yoghurt, a smoothie or porridge where it disappears.
You need a milligram scale
Servings of 500mg to 1,000mg are too small to measure reliably by spoon. A level quarter teaspoon is roughly 400 to 475mg depending on how the powder settles, which is a wide range. A £10 pocket scale that reads to 0.01g solves it.
Taste and texture
Very faint, slightly bitter, essentially neutral. Fine crystalline grains that pass a 20 mesh sieve; it feels like fine sand rather than flour. It settles quickly in liquid, so drink promptly.
Start at the bottom of the range
If you have not taken L-tyrosine before, start at 500mg once a day in the morning and stay there for a week before considering 1,000mg. Do not exceed 1,000mg a day without professional advice.
Check the interaction box first
MAOIs, levodopa, thyroid medication, overactive thyroid and PKU are hard stops; see the red box above. If any apply, do not buy this until you have spoken to your doctor.
100g is 200 days at 500mg
The 100g pouch is the starter size and outlasts most people's first trial. Move up to 500g or 1kg once you know you will keep taking it; the price per gram falls sharply.
Fermented vs synthetic vs 100% pure: what the labels mean
Most L-tyrosine listings use one of three descriptions. They are not interchangeable, and one of them is a number that no assay actually produces.
| Label wording | What it usually means | This product |
|---|---|---|
| Fermented / vegan | Made by growing a microbial strain on a sugar feedstock, then extracting and crystallising the amino acid. No animal input. | Yes. Glucose from corn, fermented, decolourised, filtered, crystallised, dried and screened. Dossier corrected an earlier historical mislabelling as synthetic (version 4). |
| Synthetic | Built by chemical synthesis rather than fermentation. Can be equally pure; the question is what you want to buy. | No. |
| 100% pure | A marketing figure. Pharmacopoeial assays give a range, and the USP range for L-tyrosine is 98.5% to 101.5% on a dry basis. A stated 100% is not a test result. | We quote the assay range and the impurity limits instead: total impurities max 2%, any single impurity max 0.5%. |
| USP grade | Meets the identity, assay and impurity tests in the United States Pharmacopeia monograph for L-tyrosine. | Yes: infrared ID, assay 98.5 to 101.5%, rotation -9.8° to -11.2°, LOD max 0.3%, ash max 0.4%, chloride and sulphate max 0.04%, iron max 0.003%. |
Understanding the powder
Where it comes from
Cambridge Commodities product P2038, L-Tyrosine (Vegan/Fermentation), manufactured in China to USP specification and distributed in the UK. The process: glucose from corn, microbial fermentation, crude tyrosine, decolouration, filtration, neutralisation and crystallisation, centrifugation, drying, screening, packing. Not GM, not irradiated, no nanoparticles, complies with EU pesticide MRLs and PAH limits.
Solubility, and why it matters for how you take it
Around 0.45g per litre in water at 25°C. Solubility rises in hot water and in acidic or alkaline solutions, but for everyday use the practical answer is to take it as a suspension or in food. Low solubility is a property of the molecule and tells you nothing about purity in either direction.
Density and measuring
Bulk density 0.3 to 0.38g/ml. A level 5ml teaspoon is therefore about 1.5 to 1.9g; a level 1.25ml quarter teaspoon about 400 to 475mg. Because the range is wide, weigh servings on a milligram scale. For home capsule filling, a size 00 holds roughly 270 to 340mg tamped, a size 0 roughly 200 to 250mg.
Allergens, honestly
The supplier's table lists all 14 declarable allergens as not contained and not handled on the manufacturing site, and confirms the material is derived from maize. The same dossier states allergens are not individually tested on every batch and that a voluntary free-from claim would need additional testing. We have not commissioned that testing, so we do not print the claim. If you have a severe allergy, ask us for the current dossier before ordering.
Microbiology and heavy metals
Release limits: total viable count max 1,000 cfu/g, yeasts and moulds max 100 cfu/g, E. coli negative in 25g, Salmonella negative in 25g; total heavy metals max 15ppm, lead max 3ppm, cadmium max 1ppm, mercury max 0.1ppm, arsenic max 1ppm. These are specification limits, with results reported per batch on the certificate of analysis.
Shelf life and storage
Minimum two years from manufacture on the supplier spec; your pouch carries the batch best-before date. Store sealed, cool, dry and out of sunlight. The powder is not strongly hygroscopic but loss on drying is limited to 0.3% and keeping it dry keeps it free-flowing.
Full specification
| Parameter | Specification |
|---|---|
| Product | L-Tyrosine (Vegan/Fermentation), free-form, CCL code P2038 v5 |
| Identification | Infrared (IR): positive |
| Assay (dry basis) | 98.5% to 101.5% |
| Appearance / aroma | White crystals or crystalline powder; characteristic |
| Sieve analysis | 100% pass 20 mesh |
| Loss on drying / ash | Max 0.3% / max 0.4% |
| Bulk density | 0.3 to 0.38g/ml |
| Specific rotation | -9.8° to -11.2° |
| Chloride / sulphate / iron | Max 0.04% / 0.04% / 0.003% |
| Total impurity / individual impurity | Max 2% / max 0.5% |
| Microbiology | TVC max 1,000 cfu/g; yeasts and moulds max 100 cfu/g; E. coli and Salmonella negative in 25g |
| Total heavy metals | Max 15ppm |
| Lead / cadmium / mercury / arsenic | Max 3ppm / 1ppm / 0.1ppm / 1ppm |
| Molecular formula / weight | C9H11NO3 / 181.19 |
| CAS / EC number | 60-18-4 / 200-460-4 |
| Composition | L-tyrosine 100%; source: glucose from corn |
| Pharmacopoeia standard | USP |
| Country of origin / manufacture | China / China; UK distributor Cambridge Commodities |
| Vegan / GM / irradiation | Vegan; not GM; not irradiated; free of nanoparticles; not tested on animals |
| Shelf life / storage | Min 2 years from manufacture; sealed, cool, dry, out of sunlight |
| Ingredients | L-tyrosine. Nothing else. |
| Pack sizes | 100g, 250g, 500g, 1kg, 2kg, 5kg, 10kg |
| Packed by | Charge Products, Southend-on-Sea, Essex, 5 Star Food Hygiene Rating |
Pack size guide: how long each pouch lasts
Days per pouch at 500mg and at 1,000mg a day. 100g is the starter size; 1kg suits households and home capsule filling; 5kg and 10kg are trade sizes supplied with the dossier and CoA. The per-gram price drops with each step up.
| Pack size | Days at 500mg | Days at 1,000mg |
|---|---|---|
| 100g (starter) | 200 | 100 |
| 250g | 500 | 250 |
| 500g | 1,000 | 500 |
| 1kg | 2,000 | 1,000 |
| 2kg | 4,000 | 2,000 |
| 5kg (trade) | 10,000 | 5,000 |
| 10kg (trade) | 20,000 | 10,000 |
How to take L-tyrosine powder
1. Weigh it
500mg to 1,000mg on a milligram scale. Start at 500mg if new to it. A level quarter teaspoon is only a rough 400 to 475mg.
2. Mix it
Stir into water and drink at once as a suspension, or fold into yoghurt, a smoothie or porridge. It will not dissolve; that is the amino acid, not the batch.
3. Once a day, morning
One serving a day, with or without food. Do not exceed 1,000mg a day unless advised by a health professional. Reseal the pouch after use.
Do not exceed the stated serving
Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. Keep out of reach of children. If you take any medication or have a medical condition, check with your GP before use; see the interaction box at the top of the page.
Where to buy L-tyrosine powder UK
You can buy L-tyrosine powder UK-wide direct from this page: choose 100g, 250g, 500g, 1kg, 2kg, 5kg or 10kg above and add to basket. If you are looking for where to buy vegan L-tyrosine UK shoppers can check on a marketplace, the same powder is on our eBay store, where Charge Products holds 99.7% positive feedback across 164,000+ sales. However you order, stock is weighed and packed in Southend-on-Sea and leaves the same day before 3:30pm, Monday to Friday. Customer service is open 9:00am to 3:30pm on weekdays.
Wholesale · Trade · B2B
L-Tyrosine Powder Wholesale UK · Bulk Amino Acid Supplier Since 2016
We supply wholesale L-tyrosine powder UK brands and retailers can document: bulk L-tyrosine in 5kg and 10kg from this page and larger quantities on request, white label L-tyrosine pouches, L-tyrosine capsule filling in our own Essex unit, and amino acid trade supply UK-wide. The Cambridge Commodities dossier P2038 and the batch certificate of analysis are available for your technical file, with the specification quoted exactly as issued, so your own labelling can be built on documented figures.
Who buys from us: sports nutrition brands · health food shops · white-label start-ups · marketplace and FBA sellers · nutritional therapists · gyms · contract packers · online retailers · EU and export buyers.
Bulk pack sizes
5kg and 10kg on this page; 25kg sacks quoted per order.
White / private label
Pouches under your brand, with the spec figures to support your label.
Capsule filling
The same powder filled to your target weight in vegan HPMC shells.
Documentation
Technical dossier, batch CoA, allergen statement and process flow on request.
Email sales@chargeproducts.co.uk with the quantity and format you need.
Related products
- L-tyrosine capsules: the same amino acid, pre-weighed in vegan capsules
- L-arginine 750mg capsules: another single amino acid, sold the same way
- L-theanine capsules
- Magnesium glycinate capsules: magnesium contributes to normal psychological function
- Magnesium glycinate powder
- All amino acid supplements: the full range, with the claims position for each
- All powders
The magnesium wording is the authorised register claim for magnesium; it belongs to magnesium, not to tyrosine.
L-tyrosine powder: frequently asked questions
What is L-tyrosine powder?
L-tyrosine is one of the 20 amino acids the body uses to build protein. It is classed as non-essential because the body can make it from phenylalanine, and it is found in protein foods such as cheese, chicken, fish, eggs, beans and nuts. This product is the free-form L-isomer as a plain crystalline powder, made by fermentation of corn-derived glucose, to USP specification, with nothing added.
Is this L-tyrosine vegan?
Yes. The supplier dossier lists it as suitable for vegetarians and vegans. It is made by fermenting glucose from corn with a microbial strain, then purified and crystallised. No animal-derived material is used at any stage.
Is it fermented or synthetic?
Fermented. Our supplier's dossier (CCL product P2038, version 5) corrected an earlier historical error in which the product had been labelled synthetic; the current name is L-Tyrosine (Vegan/Fermentation) and the process flow chart runs glucose, fermentation, crude tyrosine, decolouration, filtration, neutralisation and crystallisation, centrifugation, drying, screening.
Is it 100% pure?
The specification is an assay of 98.5% to 101.5% on a dry basis by USP method, with total impurities no more than 2% and any single impurity no more than 0.5%. That is the pharmacopoeial standard for L-tyrosine. We quote the specification range rather than a round 100%, because a round 100% is not what an assay produces.
Why does the powder not dissolve in water?
L-tyrosine has very low water solubility, roughly 0.45g per litre at room temperature, so a gram of it will not dissolve in a glass of water no matter how long you stir. It is not a fault and it is not a purity problem; it is simply the chemistry of this amino acid. Stir it into water and drink it straight away as a suspension, or mix it into yoghurt, a smoothie or porridge.
How much L-tyrosine powder should I take?
Our suggested use is 500mg to 1,000mg once a day, in the morning, with or without food. Do not exceed 1,000mg a day unless a health professional has advised otherwise. Weigh it on a milligram scale rather than guessing with a spoon.
How much is a teaspoon of L-tyrosine?
The bulk density is 0.3 to 0.38g/ml, so a level 5ml teaspoon holds roughly 1.5 to 1.9g, and a level quarter teaspoon roughly 400 to 475mg. Powders settle and pack differently, so these are estimates. For a 500mg serving a milligram scale is the reliable tool.
Does L-tyrosine have any authorised health claims in the UK?
No. There are no authorised health claims for L-tyrosine on the Great Britain nutrition and health claims register, so this page does not make any. We sell it on what it is: identity, assay, impurity limits, microbiology, heavy-metal limits and origin.
Who should not take L-tyrosine?
Do not take L-tyrosine if you are taking a monoamine oxidase inhibitor (MAOI), levodopa or thyroid hormone medication, or if you have an overactive thyroid or Graves' disease, unless your doctor has told you to. Not suitable during pregnancy or breastfeeding, or for under 18s, without medical advice. If you have phenylketonuria (PKU), your tyrosine intake should be managed by your metabolic clinic, not by an over-the-counter powder.
What does USP grade mean?
USP is the United States Pharmacopeia, which publishes the identity, assay and impurity tests for L-tyrosine. Our supplier's specification is written against the USP monograph: infrared identification, assay 98.5% to 101.5% on a dry basis, specific rotation -9.8° to -11.2°, loss on drying no more than 0.3%, residue on ignition (ash) no more than 0.4%, chloride and sulphate each no more than 0.04%, iron no more than 0.003%.
What is specific rotation and why is it on the spec?
L-tyrosine is chiral: the L form and the D form are mirror images and rotate polarised light in opposite directions. A specific rotation of -9.8° to -11.2° confirms that the material is the L-isomer, which is the form found in protein and the form the body uses. It is one of the identity checks alongside the infrared spectrum.
Is this L-tyrosine free from gluten, soya, dairy and nuts?
The supplier's allergen table lists none of the 14 declarable allergens as present or handled on the manufacturing site. However, the dossier states clearly that allergens are not individually tested for on each batch, so we do not print a free-from claim. The material is derived from maize (corn), which is not a declarable allergen.
Where is it made and where is it packed?
The raw material is manufactured in China to USP specification and supplied through Cambridge Commodities, a UK ingredient distributor. It is packed to order in our own unit in Southend-on-Sea, Essex, which holds a 5 Star Food Hygiene Rating.
How should I store L-tyrosine powder?
In the resealed pouch, in a cool, dry place away from direct sunlight and moisture. The supplier gives a minimum shelf life of two years from manufacture; the best-before date on your pouch is the one to follow.
Can I put the powder into capsules myself?
Yes. It is free-flowing and screened to 20 mesh. At 0.3 to 0.38g/ml a size 00 capsule holds roughly 270 to 340mg tamped and a size 0 roughly 200 to 250mg. We also offer capsule filling to order under wholesale.
Do you sell L-tyrosine wholesale?
Yes. We supply 5kg and 10kg from this page and larger quantities, white label pouches and capsule filling on request. The supplier dossier and batch certificate of analysis are available for your technical file. Email sales@chargeproducts.co.uk.
About Charge Products
UK supplement and ingredient supplier since 2016, based in Southend-on-Sea, Essex. We weigh, pack and encapsulate in our own unit, quote supplier specifications exactly as issued, and make only the health claims the Great Britain register allows, which for L-tyrosine is none.
164,000+ verified sales
Across our marketplaces, 99.7% positive on eBay.
5 Star Food Hygiene Rating
Awarded by Southend-on-Sea City Council under the FSA scheme.
Wholesale and trade
Bulk, white label and capsule filling across the range.
References
Educational context only. No health claims are made for L-tyrosine.
1. Cambridge Commodities Ltd. Product Technical Dossier: L-Tyrosine (Vegan/Fermentation), product code P2038, version 5. Specification, allergen table, statements and process flow quoted on this page.
2. EFSA Panel on Dietetic Products, Nutrition and Allergies. Scientific Opinion on the substantiation of health claims related to L-tyrosine and contribution to normal synthesis of catecholamines (ID 1671), contribution to normal mental performance (ID 1672) and contribution to the normal function of the nervous system. EFSA Journal. 2011;9(4):2072. The assessment behind the absence of authorised claims. doi.org/10.2903/j.efsa.2011.2072
3. National Center for Biotechnology Information. PubChem Compound Summary: L-Tyrosine, CID 6057. Physical and chemical properties including water solubility. pubchem.ncbi.nlm.nih.gov/compound/6057
4. Department of Health and Social Care / Food Standards Agency. Great Britain nutrition and health claims (NHC) register. gov.uk NHC register
Disclaimer: Food supplement, not a medicine. Not intended to diagnose, treat, cure or prevent any disease. No authorised health claims exist for L-tyrosine in Great Britain and none are made; references are background only. Specification figures are the supplier's release limits from the Cambridge Commodities P2038 dossier; batch results are reported on the certificate of analysis. Allergens are not individually tested per batch and no free-from claim is made. Do not take if you use MAOI antidepressants, levodopa or thyroid medication, or have an overactive thyroid, Graves' disease or phenylketonuria, unless your doctor advises. Not suitable for under 18s. Consult your GP if pregnant, breastfeeding, taking medication or managing a diagnosed condition. Do not exceed 1,000mg a day. Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. Keep out of reach of children. Charge Products is a trading name of Big Idea Services Ltd, Company No. 11645389, Unit 1, 8 Towerfield Road, Towerfield Industrial Estate, Southend-on-Sea, Essex SS3 9QE.
| Grams |
100 Grams, 250 Grams, 500 Grams, 1 kilo, 2 kilo, 5 kilo, 10 kilo |
|---|
