Quick Verdict
Whey Protein
Fast-digesting complete protein derived from milk. Richest natural source of BCAAs, especially leucine (key mTOR activat
Evidence: strong (800+ studies)
Collagen Peptides
Hydrolyzed collagen (types I, II, III) for skin, joint, and connective tissue health. Provides glycine, proline, and hyd
Evidence: moderate (60+ studies)
Side-by-Side Comparison
| Whey Protein | Collagen Peptides | |
|---|---|---|
| Category | protein | protein |
| Evidence Level | strong | moderate |
| Studies | 800+ | 60+ |
| Dosage | 20-40 g | 10-20 g |
Stack Compatibility
Whey Protein: Creatine, Casein (before bed), Dextrose (post-workout insulin spike)
Collagen Peptides: Vitamin C, Hyaluronic Acid, Glycine, Magnesium
Which Should You Choose?
Whey Protein has stronger evidence (800+ studies).