Essential amino acids (EAA)
Unnecessary if your daily protein is adequate.
What it is for
Stimulating protein synthesis when no complete protein is at hand.
How it works
They provide the 9 essential amino acids needed to build muscle (unlike BCAAs, which are only 3).
Dosing
6–12 g with enough leucine (~2–3 g).
When to take it
Around training if you are fasted or hours will pass until your next protein meal.
Safety
Safe.
Side effects
Rare digestive discomfort.
Interactions
None relevant.
Contraindications
None in healthy people.
Who it has been studied in
Possible use in older adults or during intermittent fasting.
Frequently asked
Better than whey?
No: a whey shake provides EAAs and more, for less money.
- Evidence tier
- C
- Quality
- Moderate
- Studies
- Several acute RCTs
- Consensus
- Superior to BCAAs; not to eating protein
- Controversy
- A marginal benefit over an adequate protein diet
- Reviewed
- 2023
Strength of evidence out of 5.