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Popular EAA supplements

15 essential amino acid powders, tablets and hydration blends people buy most. What the research says is in the guides below.

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Popular EAA supplements

01 Guides

Guides

Essential amino acids (EAAs) are the nine amino acids your body cannot make. In studies they are the part of protein that switches on muscle protein synthesis. Start with the question that fits: is an EAA worth it, how does it compare with BCAAs and whey, and how much do studies use?

1LLeuLeucine2IIleIsoleucine3VValValine4KLysLysine5MMetMethionine6FPhePhenylalanine7TThrThreonine8WTrpTryptophan9HHisHistidine
Buying guide 01 Choose an EAA What to look for on the label, which brands sell what, and who EAAs suit. Read the guide Comparison 02 EAA vs BCAA Why three amino acids are not the whole story, with the research. Read the guide Dosage 03 How much to take The doses studies used, leucine content, and how to read the grams. Read the guide
02 What we know

The evidence in three lines

What the studies we cite actually measured, in plain language.

  1. EAAs drive the signal

    In older adults, 18 g of EAAs raised muscle protein balance as much as 40 g of mixed amino acids (Volpi 2003). Non-essential amino acids added little.

  2. BCAAs alone fall short

    Building muscle protein needs all nine. A review found no human study of oral BCAAs alone measuring a rise in muscle protein synthesis (Wolfe 2017).

  3. Total protein matters most

    For muscle size, total daily protein predicted results better than timing (Schoenfeld 2013). EAAs are one way to add to it.

03 Finder

Find an EAA in three taps

Form, diet and what matters most to you. You get a shortlist of three, why each fits, and a link to check the current price.

1 Form
2 Diet
3 What matters most

Your shortlist

04 The science

How EAAs compare

Protein foods differ in how much of their protein is essential. Animal proteins tend to run higher than many plant proteins.

Bar chart of essential amino acids as a percent of protein: whey 43, milk 39, muscle 38, casein 34, egg 32, wheat 22, oat 21, lupin 21 (Gorissen 2018)PLATE 11 ESSENTIAL AMINO ACIDS, % OF PROTEIN01020304050Whey43.0Milk39.0Muscle38.0Casein34.0Egg32.0Wheat22.0Oat21.0Lupin21.0SOURCE: GORISSEN ET AL. 2018ANIMALPLANTMUSCLE
Fig. 2 Essential amino acids as a percent of protein, from Gorissen et al. 2018.

Why it matters. The ISSN position stand on protein says it is the EAAs that are required to stimulate muscle protein synthesis, and that rapidly digested proteins high in EAAs and leucine are most effective at doing so.

Where supplements fit. An EAA powder is all essential amino acids, so a small scoop delivers what a larger serving of food protein would. That can help when appetite is low or calories are tight. EAA vs whey protein.

Leucine. Leucine appears to act as a trigger for muscle protein synthesis, especially in older adults (systematic review, 2021). All nine EAAs explained.

05 Learn

The science, page by page

Benefits, dosing, timing and safety, each with the studies behind it.

The science What are the 9 essential amino acids? The science EAA vs BCAA: which is better? The science EAA vs whey protein The science EAA benefits: what studies support The science EAA dosage: how much to take The science When to take EAAs The science Essential amino acid side effects and safety
06 For you

Guides for your situation

Women, older adults, vegans and people who fast each have different questions.

For you Essential amino acids for women For you Essential amino acids for older adults For you Vegan EAA supplements For you Do EAAs break a fast? Brands EAA brands compared Brands Kaged EAA and Amino Synergy Brands Transparent Labs Intra EAA Brands Thorne Amino Complex Brands BodyHealth PerfectAmino
07 Shop

Shop by name

Straight to current listings. Read the matching guide first if you are not sure what fits.

08 FAQ

Questions people ask

What is an EAA supplement?

An EAA supplement supplies the nine essential amino acids as free amino acids, usually as a powder or capsules. "Essential" means your body cannot make them, so they must come from food or supplements. The nine are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine.

Do EAA supplements work?

In short-term lab studies, essential amino acids raise muscle protein synthesis, and studies in older adults suggest they are what drive that response. Long-term results are mixed and small. Most experts see EAAs as a convenient protein source, not a replacement for enough total protein from food.

Are EAAs better than BCAAs?

BCAAs are three of the nine EAAs. Building muscle protein needs all nine, and a 2017 review found no human study showing BCAAs alone raise muscle protein synthesis when taken orally. If you choose one of the two, research favors EAAs.

Are EAAs better than whey protein?

Not necessarily. Whey is a complete protein rich in EAAs, and it costs less per gram of EAA in many cases. EAAs suit people who want a smaller, lower-calorie dose, a drink to sip during training, or an option without dairy.

Are EAA supplements safe?

For healthy adults at the doses used in studies, amino acid supplements are generally well tolerated, but long-term safety data are limited. Talk to your doctor first if you are pregnant or nursing, have a kidney or liver condition, or take medication.

Sources: MedlinePlus, Volpi 2003, Wolfe 2017, ISSN 2017, Gorissen 2018, Schoenfeld 2013. We have not tested these products; see how we choose.