Ostarine (MK-2866)
Enobosarm. Selective Androgen Receptor Modulator (SARM), non-steroidal sarm.
This page describes what Ostarine (MK-2866) is and its known risks. It is not medical advice and not a guide to using it. Many of these substances are prescription-only or illegal to use without a prescription. Speak to a doctor.
- Class
- Selective Androgen Receptor Modulator (SARM)
- Legal status
- Research chemical (not approved for human use)
- Half-life
- 24 hours
- Liver strain
- Low
- Kidney strain
- Low
- Converts to estrogen
- None
- Suppresses natural hormones
- Yes
Medical uses
- None (clinical trials for muscle wasting)
What it does in the body
Anabolic
- Lean muscle gain
- Strength increase
- Fat loss
- Bone density increase
- Joint healing
- Minimal water retention
Forms, half-life and detection
| Form | Half-life | Reported detection window |
|---|---|---|
| Oral (liquid or capsules) | 24 hours | Unknown (detected in drug tests) |
Side effects and health risks
Hormones and fertility
- Testosterone suppression (dose-dependent, mild to moderate)
- Reduced HDL cholesterol
Liver
- Elevated liver enzymes (rare, dose-dependent)
Other
- Headaches
- Nausea (rare)
- Fatigue (during suppression)
Blood tests worth monitoring
From its known properties, these are the markers doctors commonly check. Getting blood work before, during and after is how problems are caught early.
- Androgens tend to lower HDL, raise LDL and thicken the blood: HDL Cholesterol, LDL Cholesterol, Hematocrit, Hemoglobin
- Shuts down natural production (PCT needed): Total Testosterone, LH, FSH
Related compounds
Questions
What is the half-life of Ostarine (MK-2866)?
About 24 hours. Half-life is the time for the level in the blood to fall by half.
How long is Ostarine (MK-2866) detectable?
Testing windows of Unknown (detected in drug tests) are reported, depending on the test and the person.
Is Ostarine (MK-2866) legal?
Research chemical (not approved for human use). Laws differ by country and change; check the rules where you live.
What blood tests matter with Ostarine (MK-2866)?
Based on its properties, these markers are commonly monitored: HDL Cholesterol, LDL Cholesterol, Hematocrit, Hemoglobin, Total Testosterone, LH and FSH. A doctor can order and interpret them.
What are the side effects of Ostarine (MK-2866)?
Hormones and fertility: testosterone suppression (dose-dependent, mild to moderate) and reduced hdl cholesterol. Liver: elevated liver enzymes (rare, dose-dependent). Other: headaches, nausea (rare) and fatigue (during suppression).
For information only, not medical advice. MyoStats is a tracking tool used at your own discretion. Speak to a doctor before changing your training, diet, medication or anything you take.