They are the components protein is built from. You get them from food in the ordinary way; the reason they are sold individually is that people want a particular one in a larger amount than a meal would provide.
That is the honest description, and it is where the useful part of the explanation stops. If you want to know whether a specific one is right for you, that is a question for a nutritionist or your GP rather than for a shelf.
Powder is the usual choice where the amount taken is measured in grams, which is why glutamine is most often sold that way – Biocare's 200g tub, for instance. It stirs into water and there is nothing to swallow.
Capsules and tablets are simpler where the amount is smaller and you want it the same every time. Lamberts' 1000mg arginine capsules are a single gram each, which is convenient.
Follow the amount on the pack. More is not better with amino acids, and taking several separate ones at once is the point at which it is worth getting advice rather than guessing.
If you are pregnant, breastfeeding, taking prescribed medication or managing a diagnosed condition, speak to a pharmacist or your GP before starting. Ring us on 01323 928523 if you want to talk through what is actually in a product.
FAQ
What are amino acids?
The building blocks that make up protein. They come from food normally; supplements provide a single one in a larger amount than a meal would.
Powder or capsules?
Powder where the amount is measured in grams, such as glutamine. Capsules where the amount is smaller and consistency matters more than flexibility.
Can I take more than one?
You can, but that is the point at which it is worth asking a nutritionist or your GP rather than working it out from labels.
Are they suitable for vegetarians?
Many are, but the capsule shell and the source vary by product. Each product page states it.
