Ostarine
Lean mass up in trials. Not approved.
Grade B: Some human proof
Small, early or mixed results in people.
The grade is for the use people talk about, not for every use. Filed under: SARMs (not approved).
How it works
A SARM. It flips the same switch in the body that testosterone does.
How it was given in studies
By mouth, in the trials.
This is what the studies did. It is not a how-to. Source: Trial in cancer patients. The Lancet Oncology, 2013.
What studies saw
In a 12-week trial of 120 older adults, lean mass rose about 1.3 kg at the highest amount tested. Two late-stage cancer trials improved lean mass but not physical function, according to a later review.
The trade-off
Total testosterone fell in men at the two highest amounts tested. Not FDA-approved, and bottles often do not match the label.
When it showed up, in studies
Lean mass up over 12 weeks in older adults.
Sources
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Keep going
We show what studies found. We never tell you what to take. Doses vary by study. Check the sources and talk to a doctor.