Fitorex

Essential amino acids (EAA)

Unnecessary if your daily protein is adequate.

  • Tier C — Preliminary or mixed — it might work, it might not
  • Nutrition

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.

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