Essential Amino Acids

Do essential amino acids work?

Overall Effectiveness Rating for Essential Amino Acids

The overall effectiveness rating for essential amino acids is 2.7 out of 3. This rating means there is ample evidence that using essential amino acids will lead to positive results.

Overall Confidence Rating for Essential Amino Acids

There are 8 studies in the database on essential amino acids; the confidence rating is 36. A score above 80 means the effectiveness rating for this supplement is reliable. A score under 80 means there is insufficient evidence to ensure a reliable effectiveness rating. Note, this rating is for essential amino acids as a whole. There are also individual ratings for the claims below.

Individual Claims

The overall ratings above do no necessarily reflect each claim about essential amino acids. Individual claims can have higher or lower ratings. For example, some supplements may have a lot of backing for one claim, but be completely useless for another. Click on claims below for more information.

Body Composition (weight, muscle, body fat) Claims Effectiveness Rating Confidence Rating
maintain muscle mass during weight loss

Protein Synthesis Claims Effectiveness Rating Confidence Rating
decrease protein breakdown
increase protein synthesis

Recovery Claims Effectiveness Rating Confidence Rating
reduce muscle damage
reduce muscle soreness


Title of Study
An oral essential amino acid-carbohydrate supplement enhances muscle protein anabolism after resistance exercise
Effects of Amino Acid Intake on Anabolic Processes
Effects of Amino Acid Supplementation on Muscle Soreness and Damage
Essential amino acids and muscle protein recovery from resistance exercise
Independent and combined effects of liquid carbohydrate/essential amino acid ingestion on hormonal and muscular adaptations following resistance training in untrained men
Postexercise net protein synthesis in human muscle from orally administered amino acids
The Catabolic Effects of Prolonged Inactivity and Acute Hypercortisolemia Are Offset by Dietary Supplementation
Whey protein and essential amino acids promote the reduction of adipose tissue and increased muscle protein synthesis during caloric restriction-induced weight loss in elderly, obese individuals