MK-2866
People mainly take MK-2866 for performance, recovery, hormones. Based on 158 first-hand reports and 0 meta-analyses & systematic reviews in the medical literature. Ranked #250 of 1,974 overall.
Of reports that state an outcome, 48% are positive.
What MK-2866 does, according to users
Of the people who reported each effect, the share who said it got better.
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
No randomized controlled trials in humans found on PubMed. The grade measures how much human research exists — read the conclusions below for what it found.
Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
Reported side effects
How often each side effect came up across all reports.
What users say
Verbatim quotes, shortened only — each links to the original discussion.
“Ostarine suppresses your natural testosterone just like an aas would”
“It's a SARM used to preserve or gain muscle mass. It reduces your testosterone levels. So maybe the added the muscle mass helps but reducing your test probably has the opposite effect”
“I just ordered Ostarine for building back my muscle.”
“Ostarine is the less suppressive one.”
“Ostarine lowered my libido.”
Other options for performance
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate