Supplement evidence

067 / 575Protein form

Whey protein

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The short answer

A leucine-rich complete protein that supports muscle protein synthesis when it helps meet protein needs.

Evidence and scope: Supported for specific outcomes
This status does not grade the ingredient for every goal, outcome, or person.
Important limitation: Evidence supports a specific outcome, not a general wellness or longevity effect.
Before deciding: Key concern: Milk allergy, lactose intolerance, kidney disease, and product contamination require review.

01 / PRACTICAL GUIDE

Dose, absorption, and combinations

These are indication-specific reference or studied ranges—not a personalized prescription. Start with the objective, then check the form, label, medicines, and health conditions.

Reference range by objective

Per-meal protein20–40 g per serving within the daily protein target

Reference or studied range—not a personalized prescription. The product label or a clinician may specify a different dose.

Dose source ↗

More is not automatically better. A clinician or product label may specify a different amount.

Absorption / solubilityFat/water classification is not the key factor

Fat/water solubility is not the useful decision point; preparation, fluid, timing, or strain identity matters more.

How it is commonly taken

Use around meals or training as needed; total daily protein matters most.

Do not combine casually

Milk allergy, lactose intolerance, kidney disease, and product contamination require review.

Dose and use source ↗

Dose and use links lead to primary or official source material. Search links are discovery tools, not proof that every returned paper applies.

02 / EVIDENCE

What the research says

We keep supportive, mixed, negative, safety, and contextual findings together. The headline never replaces the underlying papers.

3research papers in this ledger

30unique primary studies represented

2,105unique participants represented

These are audited counts for this JIVANA collection, not search-result totals. Participants are counted once when multiple papers use the same cohort; review papers are not added again to participant totals.

Open the research timelineResearch timeline

Entries are ordered by publication year. A study period appears only when the source reports it.

2024

Mixed or qualifiedPMID 39303495

Effectiveness of whey protein supplementation on muscle strength and physical performance of older adults

Whey plus resistance exercise produced a small lower-body strength advantage, but handgrip, walking, timed-up-and-go, lean mass, and fat mass did not improve overall. Appendicular muscle mass was based on only two heterogeneous trials.

Published: 2024Duration: Varied across 30 randomized trialsn=2,105 participants30 primary studies represented

Study design and methods

Design: Systematic review and meta-analysis of 30 randomized controlled trials
Population: 2,105 adults aged 60 and older
Intervention: Whey protein with or without resistance training versus placebo or control
Outcome: Strength, physical performance, lean mass, fat mass, and appendicular skeletal muscle mass

Funding or conflict note: The authors reported no competing interests.

Open research record ↗

2013

Does not support the tested claimPMID 23486511 · NCT01074879

Effects of whey proteins and carbohydrates on the efficacy of resistance training in elderly people

Training improved outcomes, but whey did not add gains in lean mass, strength, walking, or timed-up-and-go versus carbohydrate. Adequate baseline intake materially limits claims that every trainee benefits from extra whey.

Published: 2013Duration: 12 weeksn=161 participants

Study design and methods

Design: Randomized, double-blind, isocaloric-control trial
Population: 161 adults aged 65–91 with sufficient baseline energy and protein intake
Intervention: Whey protein 20 g or isocaloric carbohydrate after resistance exercise three times weekly
Outcome: Lean mass, quadriceps strength, 6-minute walk, and timed-up-and-go

Funding or conflict note: Excluded from aggregate totals because this trial is represented in the broader 2024 synthesis.

Open research record ↗

2013

Mixed or qualifiedPMID 24015719

Whey protein supplementation during resistance training augments lean body mass

Lean-mass gain was greater with whey (3.3 kg) than carbohydrate (2.3 kg) or soy (1.8 kg), while fat-mass change did not differ. The modest trial conflicts with later leucine-matched evidence and does not isolate whether total dose, leucine, or protein source drove the difference.

Published: 2013Duration: Approximately 9 months and 96 workoutsn=63 participants

Study design and methods

Design: Randomized, isocaloric three-arm resistance-training trial
Population: 63 previously untrained adults
Intervention: Daily whey protein, soy protein, or carbohydrate supplement during supervised training
Outcome: Lean body mass, fat mass, and plasma amino-acid response

Funding or conflict note: Excluded from aggregate totals because this trial is represented in the broader 2024 synthesis.

Open research record ↗

Unscreened discovery appendix—not evidence362 candidate publicationsSearch run: Aug 21, 2026

Complete for the displayed PubMed query at the search timestamp—not for all databases or every possible synonym. Candidates can be irrelevant, duplicate the same study, or report negative findings. They are never summed as evidence or participants until screened.

03 / SOURCES

Start with the source material

Official evidence overviewPubMed bounded human-evidence search Live PubMed discovery searchNational Library of Medicine

The live search is for discovery only. Search-result counts change and are not included in the audited totals above.

Recent PubMed discovery recordsDirect links to the first 12 records returned by the reproducible search. These are discovery candidates—not reviewed summaries or a count of supportive findings.

04 / EXPERT CONTEXT

Expert context—not evidence

Expert positions are dated context—not scientific evidence. They never raise the evidence status or become consensus by repetition.

No direct, source-verified endorsement is currently recorded. Research authorship or discussion alone is not treated as endorsement.