How It Works
Rapidly digested (10-12g/hour). High leucine content (~10%) triggers mTORC1 → muscle protein synthesis. Also rich in cysteine → glutathione synthesis (antioxidant). Lactoferrin and immunoglobulins provide immune benefits.
Dosage & Timing
Dosage Guide
Daily Dose20-40 g
TimingPost-workout within 2 hours; or anytime to meet daily protein target (1.6-2.2 g/kg)
BioavailabilityPDCAAS: 1.0 (highest). DIAAS: 1.09. Absorbed ~10g/hr. Isolate absorbs slightly faster than concentrate. Hydrolysate fastest but bitter taste.
Optimal Timing
Take with food. Consistency matters more than timing for most supplements.
Best Forms (Ranked)
Whey Concentrate (WPC80) — ★★★★☆
80% protein. Contains bioactive peptides. More lactose. Best value.
Whey Isolate (WPI90) — ★★★★★
90%+ protein. Minimal lactose/fat. Faster absorption. Best for lactose-sensitive.
Whey Hydrolysate — ★★★★☆
Pre-digested. Fastest absorption. Bitter. Most expensive. Best post-workout.
Benefits
- 25-35% increase in muscle protein synthesis
- Better lean mass gains vs other protein sources
- Improved recovery markers
- Glutathione support (immune function)
- Satiety/appetite reduction
Side Effects
- Lactose intolerance symptoms (concentrate; use isolate if sensitive)
- Acne in some individuals (IGF-1 stimulation)
- Bloating/gas
✅ Good For
- Athletes needing convenient high-quality protein
- Those struggling to meet protein targets
- Post-workout recovery
- Older adults (anabolic resistance)
⚠️ Skip If
- Dairy allergy (use plant protein)
- Vegans
- Those with severe lactose intolerance (try isolate or plant alternative)