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Single Amino Acids

Guides and comparisons BCAA vs EAA: compare amino acid profiles and labels

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Single amino acids and related compounds, such as taurine, HMB, glycine, L-tyrosine and NAC, sold mostly as capsules, plus tablets and powders. Taurine, HMB, L-Tyrosine, L-Lysine, L-Theanine, GABA and NAC (N-Acetyl Cysteine) each have a subcategory of their own; ingredients without one, such as glycine, ornithine, proline, tryptophan and carnosine, are listed here directly. Packs hold about 30 to 450 capsules or tablets, and powders weigh from 85 g to 454 g. Compare the milligrams of the named ingredient in one capsule and in one serving, together with the daily serving and the number of units in the pack.

Frequently asked questions

What does the L in L-lysine or L-tyrosine mean?

The L marks the left-handed form of the molecule, which is the form found in food proteins; its mirror image is the D-form. Some ingredients, such as glycine and taurine, have no mirror-image form, so a label may leave out the L. The ingredient list shows the exact name of each ingredient in the product.

Where do I find an amino acid that has no subcategory of its own?

Amino acids such as glycine, ornithine, proline and tryptophan, and related compounds such as carnosine and acetyl-L-carnitine, are listed in this category directly, so browse the products on this page or search for the name. L-Carnitine, L-Citrulline, L-Arginine & AAKG, BCAAs and EAAs have their own categories in the Amino Acids and BCAAs section.

How do I compare single amino acid products with different strengths and pack sizes?

Multiply the amount per capsule or tablet by the number of units in the pack: 100 capsules of 500 mg hold 50 g of the ingredient, and so do 50 capsules of 1,000 mg. Then compare the price per gram or per serving. Check the serving size first, because the stated amount can be per capsule or for a serving of two or three capsules.