Product guide · Restricted substance
GynSyn Labs MK677 liquid 30 ml (1ml 90mg)
Research compound from GynSyn Labs, 30 ml of liquid. This guide sets out what the manufacturer states about the composition of GynSyn Labs MK677 liquid 30 ml (1ml 90mg), what independent research says about its main ingredient, and the safety and regulatory points that apply. It contains substances that are not authorised as food or medicine in the EU. This guide is educational: it does not recommend use and gives no directions for use.
Back to the product- Named ingredients
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- Amounts stated
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- Status
- Restricted substance
- Evidence summaries
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Overview
Manufacturer informationGynSyn Labs MK677 liquid 30 ml (1ml 90mg) contains MK677 (Ibutamoren): 75 mg. Each pack holds 30 ml (liquid).
Ingredients & composition
Manufacturer information| Ingredient | Amount |
|---|---|
| MK677 (Ibutamoren) | 75 mg |
Scientific background
Independent researchMK-677 (ibutamoren)
MK-677 (ibutamoren) is an orally active growth hormone secretagogue: it mimics the hormone ghrelin and stimulates the release of growth hormone and IGF-1. It is often grouped with SARMs but works through a different mechanism1.
Research evidence
Independent researchMK-677 (ibutamoren)
In a 12-month randomised trial in healthy older adults, MK-677 increased growth hormone secretion and fat-free mass and was generally well tolerated1.
In a phase IIb trial in older patients recovering from hip fracture, IGF-1 levels rose but most measures of physical function did not improve, and the authors concluded that MK-677 had an unfavourable safety profile in that population, including congestive heart failure in a limited number of patients2.
Evidence limitations
Independent researchNo published study has tested this specific product; the research summarised here concerns the ingredient itself.
MK-677 (ibutamoren)
The trials were in older adults under medical supervision. There are no controlled studies in healthy young people or athletes. Analyses of products sold online as SARMs found that many did not contain the substance or amount stated on the label, and some contained other unapproved drugs3.
Safety & potential risks
Independent researchRegulatory status
Contains an investigational growth-hormone secretagogue. It is not authorised as a medicinal product or as food (including food supplements) in the EU and is on the WADA Prohibited List. No dosing information for human use is provided.
Scientific references
- Nass R, Pezzoli SS, Oliveri MC, et al. Effects of an oral ghrelin mimetic on body composition and clinical outcomes in healthy older adults: a randomized trial. Ann Intern Med. 2008;149:601-611. PubMed 18981485
- Adunsky A, Chandler J, Heyden N, et al. MK-0677 (ibutamoren mesylate) for the treatment of patients recovering from hip fracture: a multicenter, randomized, placebo-controlled phase IIb study. Arch Gerontol Geriatr. 2011;53:183-189. PubMed 21067829
- Van Wagoner RM, Eichner A, Bhasin S, et al. Chemical composition and labeling of substances marketed as selective androgen receptor modulators and sold via the internet. JAMA. 2017;318:2004-2010. PubMed 29183075
- Directive 2001/83/EC on the Community code relating to medicinal products for human use. Official Journal of the European Union. Source
- Regulation (EU) 2015/2283 on novel foods. Official Journal of the European Union. Source
- World Anti-Doping Agency. The Prohibited List (current edition). Source
Sources checked against PubMed, Crossref or the official publisher on 2026-11-04. Manufacturer information is taken from the product's own data and has not been independently tested.
The product
GynSyn Labs MK677 liquid 30 ml (1ml 90mg)
€119,00 · Sold out