RAD-140 vs MK-2866

The gap is strength, and everything that follows from it. Both work the same androgen receptor; RAD-140 just hits it far harder. Ostarine gives a steady recomp: muscle held on a cut, a little added at maintenance, strength creeping up over weeks. RAD-140 gives the strength jump people post about inside the first couple of weeks, a fuller and drier look, and the side profile of an oral steroid to go with it.

That decides the cycle around each one. Ostarine’s suppression is mild and late, usually noticed around weeks six to eight, and it often recovers on its own within a month; bloodwork tells you whether a light PCT is needed. RAD-140 shuts you down by week four, and a full PCT is not up for discussion. The liver story scales the same way: both have rare case reports, but only RAD-140 has a trial where most participants’ liver enzymes rose.

If you are cutting, the answer is still ostarine. Holding muscle through a deficit is what it does well, and you get through the diet without RAD-140’s temper or its crash. RAD-140 on a cut keeps strength up and looks dry, but a deficit, a short fuse, and a flat libido make a rough eight weeks. Day to day both are one capsule a day; ostarine you mostly forget you are on. If LGD-4033 is the third name in your search, it sits with RAD-140 at the heavy end, not with ostarine.

Nobody has tested these two against each other, and the evidence is not even the same kind: ostarine has randomized lean-mass trials, RAD-140 has an oncology dose-finding trial and case reports:

Ostarine’s trials ran at 1 to 3 mg and RAD-140’s at 50 mg and up, in different people asking different questions, so these numbers do not race each other. What they show is the shape: ostarine has lean-mass receipts, RAD-140 has liver ones.

Ostarine runs at 15 to 20 mg a day for a first cycle, eight weeks, with 25 mg and twelve weeks as the outer edge for people who know their response. RAD-140 runs at 10 mg a day for eight weeks, with 15 to 20 only if 10 genuinely stalls. Both are one capsule a day, and on both, holding a dose that works is the win.

Recovery is where the two cycles really differ. After ostarine, get bloodwork a few weeks out; if testosterone is still flat, a short, light PCT cleans it up. After RAD-140, the full four-week SERM course starts about a week after the last capsule, no bloodwork needed to justify it. Bloodwork before and after either, with liver enzymes and lipids, and a mid-cycle check on RAD-140.

The normal path is ostarine first and RAD-140 later, if ever. Finish the ostarine cycle, recover, check bloodwork, and only then step up, starting RAD-140 at 10 mg however well ostarine went. Swapping mid-cycle because ostarine feels slow trades a mild cycle for a heavy one with no recovery plan; finish what you started. Stepping down from RAD-140 to ostarine for the next cycle is a sensible move once your panel is back to baseline.

RAD-140 plus ostarine is a common forum stack. Next to RAD-140, ostarine adds suppression and little else. Skip it.

Skip the alcohol on both; each has liver injury cases in healthy young men. Both are WADA-banned, and ostarine transfers through kissing and close contact at levels that trigger a positive test, so a partner who gets tested is exposed too. Get a third-party COA either way: the capsule sold as the mild one is not always the mild one.

The same kinds of side effects, at very different volumes: