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MK-677, also known as Ibutamoren or Nutrobal, is a selective agonist of the ghrelin receptor and a growth hormone secretagogue. It is often categorized as a growth hormone secretagogue or a growth hormone releaser due to its ability to stimulate the release of growth hormone and insulin-like growth factor 1 (IGF-1).

Here are the key details about MK-677
Chemical name: MK-677
Classification: Selective Androgen Receptor Modulator (SARM)
Half Life: Approximately 24 hours
Potential benefits: Increased growth hormone and IGF-1 levels, enhanced muscle mass and strength, improved bone density, enhanced recovery and healing, potential fat loss
Recommended dosage: Typically 10-25mg per day
Acne: No
Water retention: No
HBR (Hair Loss): No
Hepatoxicity (Liver Damage): No
Aromatization (Conversion to Estrogen): No
Anabolic activity index: Not applicable (not anabolic steroid)
Androgenic activity index: Not applicable (not androgen)

MK-677 works by mimicking the action of ghrelin, a hormone that stimulates hunger and growth hormone release. It has gained popularity in the fitness and bodybuilding communities for its potential to increase muscle mass, strength, and recovery, as well as improve bone density. Additionally, MK-677 may have positive effects on sleep quality and overall well-being.