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4Optional

HMB

Also sold as Beta-hydroxy beta-methylbutyrate

Muscle preservation, mainly relevant in untrained or older populations.

4TrustedSupp Tier System™ · Tier 4Take by choice, or not at all

How long to take it

Ongoing during periods of muscle loss risk.

Who it's actually for

Older adults, people on bed rest, or in a significant calorie deficit. Trained lifters see little.

Safe upper limit

Unverified
No formal limit; 3 g daily in trials
Well tolerated across studies.
No source attached yet. Treat this as a starting point, not a citation, until reviewed.

Interactions to know about

No commonly documented medication clashes in our data. That is not the same as none existing.

Run your full list through the interaction check.

Practical notes

  • Benefits shrink the more trained you are.
  • Creatine is a better first choice for almost everyone.