Amino acids available here
| Amino acid | Products | Amount per daily dose on the label | Pack lasts |
|---|---|---|---|
| L-arginine | OstroVit capsules (150 or 300) and powder (210 g) | 3000 mg (3 capsules or 3 g of powder) | 50 or 100 days; 70 days |
| Taurine | OstroVit capsules (120) and powder (300 g) | 1500 mg (1 capsule) or 3000 mg (3 g) | 120 days; 100 days |
| L-lysine | NOW Foods tablets 1000 mg and 500 mg, from lysine hydrochloride | 2000 mg (2 tablets of 1000 mg) or 1500 mg (3 tablets of 500 mg) | 50 or 125 days; 33 days |
| Glycine | NOW Foods capsules (100) and powder (454 g) | 3000 mg (3 capsules or 3 g of powder) | 33 days; 151 days |
| L-carnitine | OstroVit L-carnitine tartrate capsules and powder | capsule 1250 mg tartrate (840 mg L-carnitine); powder 2000 mg tartrate (1360 mg L-carnitine) | 60 days; 105 days |
| L-theanine | OstroVit capsules 200 mg; 200 mg with 300 mg L-tyrosine | 200 mg (1 capsule) | 90 days |
| L-glutamine | OstroVit powder, orange flavour (500 g) | 4633 mg per 5 g serving; 1 to 2 servings a day | about 50 to 100 days |
Capsules, tablets or powder
Capsules and tablets are quick to take, but doses of 3 g need three of them. Powder gives the same dose in one scoop, and can be mixed in a drink. The glutamine powder contains the sweeteners sucralose and acesulfame K, while the pure arginine, taurine and glycine powders contain only the amino acid.
What the label figures mean
- L-carnitine tartrate is L-carnitine bound to tartaric acid. The label states both numbers, and the second one is the L-carnitine itself.
- L-lysine from lysine hydrochloride means the lysine is supplied as a salt. The amount on the label is lysine.
- The L-theanine capsule from OstroVit also contains 100 mg of inulin as a filler.
What the EU allows us to say
The EU has not authorised health claims for these amino acids. Under Regulation (EC) No 1924/2006 we therefore describe the product, the dose and the form, not what the amino acid does in the body. If you see longer promises elsewhere, they are not EU-approved. Creatine, which is not an amino acid on the label but is often bought alongside them, has its own page: creatine.
Warnings on the labels
- OstroVit: not for children, pregnant or breastfeeding women. Glutamine powder contains sweeteners.
- NOW Foods: adults only; if you are pregnant or breastfeeding, have a medical condition or take medicines, consult a doctor before use.
Sport-related products are collected in sports supplements. Protein-based collagen is a separate category, and minerals such as magnesium are listed on their own pages.
Questions
Can I take several amino acids at once?
Each label gives its own daily dose. If you combine products, add up the doses and read all the warnings. We cannot advise on individual combinations with medicines.
Why is the dose on the front different from the daily dose?
The front shows the amount in one capsule or tablet, the daily dose is what you take per day, for example three 1000 mg capsules.
Which form is cheapest?
It depends on the dose. Compare the price per day on each card, which already accounts for it.
When should I take them?
Follow the label of the product. OstroVit gives times such as 30 minutes before training for the arginine capsules, between meals for the taurine capsules and with a meal for the theanine capsules. NOW Foods glycine is best on an empty stomach.
Sources
- Regulation (EC) No 1924/2006 (nutrition and health claims on foods)
- Regulation (EU) No 432/2012 (list of permitted health claims)
- EFSA: Health claims
Content reviewed by Inese Kalniņa, dietitian.
2026-07-04