What is Ostarine?

Ostarine, also known as MK-2866, Enobosarm, or simply M2, is one of the most well-researched Selective Androgen Receptor Modulators (SARMs). It was developed by GTx, Inc. to treat muscle wasting and osteoporosis. It’s known for being one of the mildest and safest SARMs, especially for beginners or cutting cycles.

⚙️ How It Works

Ostarine selectively binds to androgen receptors in muscle and bone tissue, stimulating muscle protein synthesis and bone strengthening without significantly affecting other organs like the liver, prostate, or heart. It helps build lean mass while preserving muscle during calorie deficits.

💪 Key Benefits

Lean Muscle Growth
Not as strong as RAD-140 or LGD-4033, but provides clean, dry gains without water retention.
Muscle Preservation During Cutting
Helps maintain strength and size while dieting.
Improved Recovery
Speeds up muscle and joint recovery post-workout.
Joint Healing Potential
Anecdotally helps with joint pain and injuries, especially when stacked with compounds like MK-677.
Mild on Hormones
Very low risk of gynecomastia or estrogenic side effects.

💊 Dosage & Cycle

Typical Dosage: 10–25 mg per day
- Beginners: 10–15 mg
- Experienced: 20–25 mg
Cycle Length: 6–8 weeks
Half-Life: ~24 hours → once daily dosing is enough
PCT Needed?
✅ Mild suppression → low-dose PCT recommended after 8+ week cycles