Synopsis

Source of validity: Scientific
Rating (out of 5): 4

MK-677, also known as Ibutamoren, is a non-peptide growth hormone secretagogue that acts as a ghrelin receptor agonist. Its primary mechanism is to stimulate the endogenous secretion of growth hormone (GH) and insulin-like growth factor 1 (IGF-1). Several clinical studies have demonstrated that MK-677 increases circulating GH and IGF-1 levels, which are hormones known to play a key role in muscle growth, maintenance, and repair.

Research in both elderly and young adults has shown that MK-677 can increase lean body mass and muscle size. For example, a double-blind, placebo-controlled study published in 2001 (Murphy et al.) found that daily administration of MK-677 in healthy older adults increased GH and IGF-1 levels, leading to a significant increase in fat-free mass over 12 months without serious adverse effects. Other studies have reported improvements in muscle protein synthesis and physical function, though effects on muscle strength are less consistent.

Notably, while the evidence is promising, MK-677 is not approved by regulatory agencies for muscle-building or anti-aging purposes, and long-term safety data are limited. Its use is often discussed in the context of research and off-label bodybuilding communities, but the available scientific literature supports a role for MK-677 in supporting muscle mass, particularly in populations at risk for muscle wasting.

More about MK-677
More about Muscles

Other ingredients that support Muscles

acetyl l-carnitine
adenosine 5-triphosphate disodium (ATP)
alpha-ketoglutarate (AKG)
amino acids
amylopectin
ashwagandha
astaxanthin
beet
beta-alanine
bovine
bovine liver
branched-chain amino acids
bromelain
caffeine
calcium
cherry
chloride
coenzyme Q10 (CoQ10)
colostrum
conjugated linoleic acid (CLA)
cordyceps
creatine monohydrate
turmeric
d-alpha tocopherol
devil's claw
dong quai root
fish protein
forskohlii root
l-isoleucine
iron
kale
l-alanine
l-alanyl-l-glutamine
l-arginine
l-carnitine
l-carnosine
l-citrulline
l-glutamine
l-glycine
l-leucine
l-ornithine
l-proline
l-taurine
l-threonine
l-valine
magnesium
malic acid
maltodextrin
maltose
methylsulfonylmethane (MSM)
milk
nicotinamide riboside
ornithine alpha-ketoglutarate
peppermint oil
phosphorus
phytocannabinoids
potassium
protein
quinoa
rhizome
sardines
black ginger
soybean
specialized pro-resolving mediators (SPMs)
spinach
spirulina
tongkat ali
ubiquinol
Urolithin A
vitamin B
vitamin C
vitamin D
vitamin D3
water
watermelon
whey protein
white willow
β-nicotinamide mononucleotide (NMN)
suma
squawvine
sodium salt
solomon's seal
siler root
eucommia
electrolytes blend (proprietary)
guelder rose
polyphenols
trace minerals
wintergreen
camphor oil
menthol oil
wheat germ
wood betony
herbal blend (proprietary)
algae
chickpea protein
brown rice protein
AMP-activated protein kinase (AMPK)
arnica
17 alpha methyl 17 beta hydroxy 5 alpha androst 2 ene
17a-di methyl-bol
11-Ketotestosterone
2, 17a-dimethyl-17b-hydroxy-5a-androstan-1-ene-3-one
2a, 17a-dimethyl-17b-hydroxy-5a-androstan-3-one
Arginine Alpha Ketoglutarate
Animal Tissue
Antler
Arginine Creatine
Arginine nitrate
Arachidonic Acid
Arginine malate
Arginine aspartate
Avocado
Anserina
Alpha-ketoisocaproic acid
Acetylcholine
adenosine triphosphate (ATP)
Algal protein
Alpha hydroxyisocaproic acid
Arginine alpha-ketoisocaproate
Arginine silicate
Animal protein
Blue Cohosh
Biopeptide
Beta-hydroxybutyrate
Bicarbonate
Beef Protein
Black galingale
Beef
Beef liver
Bovine Protein
Black Gram
Black willow
Ba Ji Tian
Bee products
banana
BCAA
Chia seed
Casein
Cardarine
Chinese Mountain Ant
Carnosine
Citrate malate
Cyathula
Curcuminoid
Cramp Bark
Chuchuhuasi
Cyanotis Vaga
Coca
Coconut Water
Cetylated Fatty Acids
Creatine
Chicken
Curcuma
C-Phycocyanin
Cyanotis arachnoides
DL-Methionine
Deer Velvet
Date
D-Ribose
Dextrose
Dimethyl sulfoxide (DMSO)
Dipsacus
Dipeptide
epicatechin
Epistane
Egg
Erythrina
Elk antler
Eurycoma Longifolia
Emu Oil
Ecdysteroids
Elthyl-Alpha-Guanido-Methyl-Ethanoate
Ecdysterone
Essential Oil Blend
Egg protein
Fish
Fatty acids
fibroblast growth factor
glucose
Glycine
Isoleucine
Milk Protein
Phosphate Salt
Potash
Quinoa Protein
salt
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Other body systems supported by MK-677

Brain
Glandular System
Hypothalamus
Muscles
Pituitary
Pituitary (anterior)
Skeletal System (Bones)

Products containing MK-677

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