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Essential amino acids

Supplement amino acid blend fitness
Aka: EAA, EAAs
Brands seen in Singapore: California Gold Nutrition, BodyHealth, Nutricost, EVLution Nutrition, ALLMAX
Third-party tested: BodyHealth certifies other products with NSF Certified for Sport, but nothing for essential amino acids.Certification is granted per product, so check the tub you actually own. Not being listed is not the same as failing.
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Muscle protein synthesis · whole protein does the SAMe
When to take
0–2 h after exercise · one meta-analysis found no edge
Take with
Water · 25 g of complete protein already gives ~10 g
Pros & cons
Pros
  • ODS: ~10 g EAAs after training looks optimal for mps
  • ISSN: 6–15 g doses all stimulated protein synthesis
  • All nine EAAs are needed to trigger the response
Cons
  • ISSN: intact protein matches free-form at equal EAAs
  • 25 g of complete protein already gives ~10 g EAAs
  • No upper limit set for protein — high-intake data thin
Sources
  1. NIH ODS — Exercise and Athletic Performance (HP), protein section: the nine EAAs · read 2026-08-27
    what it says
    “The nine EAAs are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine … a meal or snack with 25 g total protein provides about 10 g EAAs”
  2. NIH ODS — Exercise and Athletic Performance (HP), protein efficacy · read 2026-08-27
    what it says
    “Muscle protein synthesis leading to increases in strength and muscle mass appears to be optimal with the consumption of high-quality protein (providing about 10 g EAAs) within 0–2 hours after exercise”
  3. NIH ODS — Exercise and Athletic Performance (HP), protein timing meta-analysis · read 2026-08-27
    what it says
    “a meta-analysis of randomized clinical trials found that ingesting protein within an hour before or after exercise does not significantly increase muscle strength or size or facilitate muscle repair”
  4. NIH ODS — Exercise and Athletic Performance (HP), implications for use · read 2026-08-27
    what it says
    “All EAAs are necessary to stimulate muscle protein synthesis, so users should select singular or complementary protein sources accordingly”
  5. NIH ODS — Dietary Supplements for Exercise and Athletic Performance (Health Professional), protein safety (updated 1 Apr 2024) · read 2026-08-27
    what it says
    “The Food and Nutrition Board has not set a UL for protein, noting that the risk of adverse effects from excess protein from food is very low”
  6. ISSN position stand: protein and exercise (Jäger et al., JISSN 2017) — amino acid summary · read 2026-08-27
    what it says
    “EAAs appear to be uniquely responsible for increasing MPS with doses ranging from 6 to 15 g all exerting stimulatory effects”
  7. Jäger et al., JISSN 2017 — intact protein vs free-form amino acids · read 2026-08-27
    what it says
    “intact protein supplements such as egg, whey, casein, beef, soy and even whole milk can evoke an anabolic response … similar or greater in magnitude to free form amino acids, assuming ingestion of equal EAA amounts”
  8. ISSN position stand: protein and exercise (Jäger et al., JISSN 2017) — safety section · read 2026-08-27
    what it says
    “people in renal failure benefit from protein-restricted diets, but extending this pathophysiology to otherwise healthy exercise-trained individuals who are not clinically compromised is inappropriate”
  9. HSA — Guidelines on Prohibited and Restricted Ingredients in Health Supplements and Traditional Medicines, GL-CHPB-1-012 Rev 001 (Oct 2025), Annexes A/B · read 2026-08-27
    what it says
    “The objective of this guideline is to highlight the substances of concern when used in HS and TM and is not meant to be an exhaustive list”
  10. iHerb Singapore — Essential Amino Acids (EAA) category page, default sort · read 2026-08-27
    what it says
    “Essential Amino Acids EAA: Powders & Capsules | iHerb … 1 - 48 of 130 results”
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Updated 2026-08-30. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.