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4Optional

Whey protein

Also sold as Whey, protein powder, casein

Convenience food, not a supplement — useful only if protein targets aren't met.

TrustedSupp Tier System™ · Tier 4Take by choice, or not at all
Check before you startThis one has documented interactions with medication classes where the consequences are serious. If you take any prescription medicine, run it past a pharmacist before starting.

Evidence strength

90/100Very strong
WEAKLIMITEDMODERATESTRONGVERY STRONG

What the evidence supports: meeting protein targets and supporting muscle gain; it is food, not a drug.

This scores how well-supported the claim above is — not how much benefit you personally would get. A high score on a narrow claim does not extend to everything the product is marketed for.

How long to take it

Use it whenever it's convenient. There is no course.

Who it's actually for

Anyone struggling to hit protein targets from food alone.

Safe upper limit

Unverified
Not applicable; a food
No limit beyond overall protein intake. Caution with significant kidney disease.
No source or citation attached yet.

Interactions to know about

Other supplements:

Run your full list through the interaction check.

Practical notes

  • Isolate if lactose bothers you.
  • Third-party testing matters — heavy metal contamination has been found in some powders.