Ostarine (MK-2866)

Ostarine (Enobosarm, MK-2866) is the quintessential "starter SARM." It is the most clinically researched SARM to date and has a safety profile that is generally considered milder than other compounds in its class.

It is primarily used for cutting (muscle preservation in a calorie deficit) and recomposition (losing fat while building muscle). It is also famed for its ability to heal joints and tendons.

Quick Specs

Mechanism of Action

Ostarine binds to the androgen receptor with high affinity and selectivity. It stimulates anabolic activity in muscle and bone tissue while having minimal androgenic impact on the prostate.

Pharmacokinetics & Dosing

Half-Life: ~24 Hours

• Frequency: Once Daily.
• Dosage:
  • Healing/Joints: 10-15mg/day.
  • Cutting/Recomp: 20-25mg/day.
  • Bulking: Generally not recommended (LGD or RAD are better).

Primary Effects

1. Muscle Preservation

Its greatest strength is preventing catabolism. While dieting hard, Ostarine helps you keep the muscle you have.

2. Joint Healing

Ostarine increases collagen synthesis and bone density. Many athletes use it specifically to heal nagging injuries.

3. Mild Gains

Gains on Ostarine are dry and lean, but modest. Do not expect to blow up.

Side Effects & Harm Reduction

1. Suppression

At 25mg/day for 8 weeks, mild suppression of testosterone will occur. Most users recover quickly, sometimes without a PCT, but bloodwork is the only way to know.

2. Lipids

Small reductions in HDL are common.

Tracking Ostarine

Using the Anabolic Tracker app:

1. Inventory: Add Ostarine (MK-2866).
2. Scheduling: Daily.
3. Metrics: Track Body Fat % and Weight.
4. Notes: Log any improvements in joint pain if using for rehab.