Protein & Amino Acids

Whether you're building muscle or just trying to hit a protein target, the picks live here. Whey, casein, plant protein, collagen, creatine, BCAAs, and individual amino acids.

Creatine Monohydrate

Creatine Monohydrate

Strength, power output, lean mass, cognitive support under stress

Strong Evidence10 products
Collagen Peptides

Collagen Peptides

Skin elasticity, joint cartilage support, and muscle mass maintenance in older adults

Mixed Evidence13 products
Whey Protein Isolate

Whey Protein Isolate

Muscle protein synthesis, lean mass accrual, and recovery from resistance exercise

Strong Evidence9 products
Plant Protein Blend

Plant Protein Blend

Supports muscle protein synthesis, recovery, and hypertrophy as a dairy-free alternative to whey protein.

Likely Effective11 products
BCAAs (Branched-Chain Amino Acids)

BCAAs (Branched-Chain Amino Acids)

Muscle protein synthesis, exercise recovery, reduced muscle soreness

Mixed Evidence10 products
L-Citrulline

L-Citrulline

Nitric oxide production, blood flow, exercise performance, blood pressure support

Likely Effective10 products
Casein Protein

Casein Protein

Slow-digesting complete protein for sustained amino acid delivery, particularly before sleep

Likely Effective11 products
Protein Powder

Protein Powder

Hitting a daily protein target to support lean mass, strength, and recovery from resistance training

Strong Evidence10 products
Mass Gainer

Mass Gainer

Convenient calorie surplus for weight gain in underweight individuals or hardgainers struggling to eat enough whole food

Likely Effective12 products
L-Glutamine

L-Glutamine

Fuel for intestinal cells and immune cells; studied for gut barrier support, IBS-D symptoms, sickle cell crisis reduction, and recovery in specific clinical settings

Mixed Evidence8 products
Beta-Alanine

Beta-Alanine

Supports exercise capacity in high-intensity efforts lasting 1-4 minutes by raising intramuscular carnosine and buffering acid build-up

Likely Effective9 products
L-Tyrosine

L-Tyrosine

Supports working memory and cognitive performance under acute stressors (cold, sleep loss, demanding mental load)

Mixed Evidence10 products
HMB (Beta-Hydroxy-Beta-Methylbutyrate)

HMB (Beta-Hydroxy-Beta-Methylbutyrate)

Supports lean body mass preservation and recovery, with the strongest signals in older adults, during bed rest, in novice trainees, and during caloric deficit

Likely Effective9 products

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products discussed on this page are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.