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Read below to see how MK 677 SARM is being used to mimic the benefits of Human Growth Hormone.


  • Increase Growth Hormone 
  • Stimulates increasing igf-1 
  • Increase lean body mass
  • Reduce body fat
  • Reduce muscle wasting
  • Improve sleep quality
  • Enhance memory
  • increases bone

MK 677 is different from other SARMS in that it has been shown to increase Growth Hormone (HGH) levels in humans. Many people in the bodybuilding and fitness world know the benefits of HGH and we’ve all heard about the famous celebrities using Human Growth Hormone to fight ageing. Just one look at Sylvester Stallone and you get the idea of what increased levels of HGH can do for you.

Let’s discuss the muscle building SARM, MK 677 is and how to use it along with its Benefits, Dosages, and Side Effects so you can decide if this is a product you want to explore.


MK 677 (Ibutamoren) is a Human Growth Hormone Secretagogue. This popular compound has been shown to promote the secretion of growth hormone and IGF-1.

By mimicking the action of the ghrelin hormone, MK-677 selectively binds to and activates ghrelin receptors in the pituitary gland resulting in a release of growth hormone. The good news about this process is that the stress hormone, cortisol is not increased.

Ghrelin is also known to affect pleasure, memory, mood, and appetite and because of their similarities, studies are underway to show MK 677 efficacy for numerous uses.


Because MK 677 promotes the secretion of HGH and IGF-1, users are reporting excellent increases in lean muscle mass and leaner, harder body composition.

Endogenous Growth Hormone (HGH) and IGF-1 are key factors in the development and regulation of muscle tissue and clinical studies have shown that exogenous HGH and IGF-1 can have positive effects on humans with hormone deficiencies by increasing muscle tissue development. As of June 2017, Ibutamoren was in the preclinical stage of development for growth hormone deficiency.

Muscle wasting can occur in people who suffer from catabolic conditions but also affects otherwise healthy individuals in the bodybuilding and fitness industry. Due to calorie-reduced dieting for competitions, competitors have been looking for a way to protect the muscle gains they’ve worked hard for – MK 677 is said to be the answer.

Among researchers in the SARMs community, this product has become extremely popular for its ability to improve sleep quality. It’s well known that Growth Hormone improves sleep quality and new studies have concluded that MK 677, with its stimulating effect on HGH levels, also has the benefit of improving sleep quality and REM sleep duration.

Memory and overall improved brain function are associated with higher IGF-1 levels so it’s not surprising that users of MK 677 SARM have reported better cognitive abilities. Better quality of sleep has also been shown to improve memory and other cognitive functions.


Researchers from the SARMs community report experimenting with doses of 10 mg to 30 mg per day, similar to what has been used in clinical studies.

MK 677 (Ibutamoren) has a half-life of 24 hours, meaning dosing once a day will be sufficient. Experienced users have reported twice a day dosing.


MK677 cycles should last more than 8 weeks to get optimal benefits. Clinical trials with mk-677 increased IGF-1 levels of over 60% after 6 weeks but interestingly, levels continued to increase to almost 73% at 12 months.

MK 677 is best taken on an empty stomach and is orally bioavailable, so capsules are the best way to take this compound. Buy MK 677 in convenient Capsule form from 99 Purity.

Before and after results from community members reviews suggest excellent lean muscle gains and better-quality sleep.

Side effects of MK 677 as reported by some researchers in the SARMs community include minor water retention and lethargy. In most cases, these effects dissipate after one week. Dosing later in the day close to bedtime will help combat the lethargy.

Similar to SR9009 and GW501516, MK 677 will not require Post Cycle Therapy (PCT) because these SARMS do not interfere with hormones like testosterone.

If you plan to stack MK 677 with other compounds, PCT may be necessary. Buy Clomid and Tamoxifen for your post cycle therapy here at 99 Purity.

Stacking MK 677 (Ibutamoren) with other SARMs is a great way to synergistically add results to your research.

IUPAC name 2-amino-2-methyl-N-[1-(1-methylsulfonylspiro[2H-indole-3,4'-piperidine]-1'-yl)-1-oxo-3-phenylmethoxypropan-2-yl]propanamide
CAS Number  159634-47-6
Formula  C27H36N4O5S
Molar mass  528.67 g·mol−1

    • Weight
      29 g
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