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evidence · mechanism · dose
Supplements/Compound

Whey Protein

aka Whey concentrate · Whey isolate · Hydrolysate

Fast-digesting complete protein rich in leucine for muscle protein synthesis.

Muscle GrowthAthletic PerformanceGeneral Wellness

Overview

Fast-digesting complete protein rich in leucine for muscle protein synthesis.

Natural sources
  • Dairy
Common forms
  • Concentrate (80%)
  • Isolate (90%+)
  • Hydrolysate

Mechanism of action

High biological value protein delivering ~2.5 g leucine per 25 g — sufficient to maximally stimulate MPS.

Pathways
  • · mTORC1 activation

Effects on the body

Supports
Muscle protein synthesis
Supports
Satiety

Organ system effects

Skeletal Muscle

Gold standard for post-workout MPS.

Evidence-based benefits

Increases lean mass and strength with training

Strong evidence

Improves satiety vs carbs

Strong evidence

Potential side effects

Common
  • · Bloating (lactose, in concentrate)
Rare
  • · Acne flare
Serious

    Drug interactions

    Levodopa
    Time protein intake away from dose.
    moderate

    Supplement interactions

    Pairs well with

    None listed.

    Avoid combining with
    • Severe dairy allergy
      May contain trace milk proteins.

    Dosing & bioavailability

    Typical dose
    20–40 g per dose; total protein 1.6–2.2 g/kg/d

    Where to buy

    Affiliate-style search links to reputable retailers. We don't endorse specific brands — verify third-party testing (USP, NSF, Informed Sport) before purchase.

    Compound
    Whey Protein
    Amazon
    Wide selection · fast shipping
    Compound
    Whey Protein
    iHerb
    Global delivery · curated brands
    Compound
    Whey Protein
    Thorne
    Practitioner-grade · NSF tested

    Scientific evidence (9)

    Systematic reviewExamine.com Supplement Database · 2023

    Whey Protein: pharmacology, clinical evidence, and safety — narrative review

    Examine.com Research Team

    Curated narrative review of human and preclinical evidence for Whey Protein, including mechanism, typical dosing, and safety considerations.

    Key findings

    Best-supported outcome: Increases lean mass and strength with training (evidence: strong). Additional outcomes and limitations summarized in the full profile.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Whey Protein — Increases lean mass and strength with training

    Live PubMed search

    Live results for "Whey Protein Increases lean mass and strength with training" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Whey Protein and "Increases lean mass and strength with training". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Whey Protein — Improves satiety vs carbs

    Live PubMed search

    Live results for "Whey Protein Improves satiety vs carbs" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Whey Protein and "Improves satiety vs carbs". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Whey Protein — randomized controlled trial

    Live PubMed search

    Live results for "Whey Protein randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Whey Protein and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Whey Protein — meta-analysis

    Live PubMed search

    Live results for "Whey Protein meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Whey Protein and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Whey Protein — pharmacokinetics

    Live PubMed search

    Live results for "Whey Protein pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Whey Protein and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Whey Protein — safety adverse events

    Live PubMed search

    Live results for "Whey Protein safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Whey Protein and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Whey Protein — dose response

    Live PubMed search

    Live results for "Whey Protein dose response" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Whey Protein and "dose response". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewGoogle Scholar · 1970

    Google Scholar: Whey Protein — clinical evidence

    Live Scholar search

    Cross-database citation index for Whey Protein as it relates to "clinical evidence".

    Key findings

    Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.

    Open study
    Educational use only. This profile is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you take prescription medication or have a chronic condition.