SARMS-IBUTAMOREN® 15 mg (MK-677 / Ibutamoren)

SARMS-IBUTAMOREN® 15 mg, commonly known as MK-677 (Ibutamoren), is a growth hormone secretagogue that stimulates the release of growth hormone (GH) and increases insulin-like growth factor-1 (IGF-1). Despite being grouped with SARMs in fitness contexts, it does not act on androgen receptors.

How It Works

Ibutamoren binds to ghrelin receptors, mimicking the action of ghrelin and signaling the pituitary gland to increase growth hormone secretion. This leads to elevated IGF-1 levels, which may support muscle protein synthesis, recovery, fat metabolism, and tissue repair. It also influences appetite regulation and sleep cycles.

Dosage Overview

Typical dosing ranges from 15–30 mg per day, with 15 mg commonly used as a starting point to assess tolerance. It is usually taken once daily due to its long half-life, often in the evening to align with natural growth hormone release during sleep. Cycle lengths commonly range from 8–12 weeks.

Potential Benefits

Ibutamoren is associated with increased growth hormone and IGF-1 levels, improved recovery, enhanced sleep quality, increased appetite, and improved body composition. It may support lean muscle gain and fat metabolism over time when combined with training and proper nutrition.

Side Effects and Considerations

Common side effects include increased appetite, water retention, fatigue, and potential changes in insulin sensitivity or glucose tolerance. While it does not require post-cycle therapy due to lack of androgen receptor activity, metabolic monitoring is often recommended during extended use.