Wholesale MK-677 (Ibutamoren / Nutrabol)
Bulk Powder, Capsules & White Label — B2B Supply from UK & EU
MK-677 (Ibutamoren), also known as Nutrabol and L-163,191, is an orally active growth hormone secretagogue developed originally by Merck & Co. Unlike SARMs which act on androgen receptors, MK-677 works as a selective ghrelin receptor agonist, stimulating the pituitary gland to increase the secretion of growth hormone (GH) and insulin-like growth factor 1 (IGF-1). Its oral bioavailability and long half-life have made it one of the most commercially significant compounds in the wholesale research market.
SARMs-Direct supplies wholesale MK-677 in raw powder and encapsulated formats to supplement brands, sports nutrition retailers, research institutions, white label operators, and distributors across Europe and internationally. All supply is strictly B2B and sold for research purposes only.
Compound Specifications
| Compound Name | Ibutamoren |
| Common Aliases | MK-677, Nutrabol, L-163,191 |
| Compound Class | Growth Hormone Secretagogue (Ghrelin Receptor Agonist) |
| CAS Number | 159752-10-0 |
| Molecular Formula | C₂₈H₄₀N₄O₈S₂ (mesylate salt form) |
| Molecular Weight | 624.77 g/mol (mesylate) |
| Purity | ≥98% (HPLC & LC-MS verified) |
| Appearance | White to off-white crystalline powder |
| Storage | Cool, dry place. Protect from light and moisture. Stable at room temperature when sealed. |
Available Formats & MOQs
Raw Powder
Minimum order: 10g per batch. Available in 10g, 50g, 100g, 500g, and 1kg quantities. Vacuum-sealed, double-layered pouches. No compound names on outer labels. COA included.
Encapsulated (Capsules)
Available doses: 10mg and 25mg per capsule. Minimum order: 1,000 units per dosage strength. Supplied in tamper-evident bottles. White label and private label packaging available.
Liquid Suspension
Available on request. Contact us for concentration options and MOQ.
White Label / Private Label
Custom branding, label design, and packaging available from 1,000 units per SKU. Typical turnaround 14–21 days from approval.
Research Context
MK-677 stimulates GH secretion by mimicking the action of ghrelin, binding to the ghrelin receptor (GHSR-1a) in the pituitary and hypothalamus. Unlike exogenous GH injections, it works by amplifying the body's own pulsatile GH release, which has made it a subject of significant research interest for conditions involving GH deficiency, muscle wasting, and metabolic decline.
Research has explored its potential in elderly populations for lean mass preservation, bone mineral density improvement, sleep quality, and appetite regulation. Its long half-life (approximately 24 hours) allows for once-daily oral dosing in research protocols, which contributes to its commercial appeal relative to injectable GH peptides.
It is commonly studied alongside SARMs such as Ligandrol (LGD-4033) and Ostarine (MK-2866) in research stacks focused on lean mass and recovery. Wholesale peptides with complementary mechanisms — including IGF-1 analogues — are available via our sister site Peptide-Direct.
All products are supplied for research purposes only and are not intended for human or veterinary use.
Quality & Documentation
- GMP-certified manufacturing
- ISO quality management system
- HACCP-compliant production controls
- Independent third-party testing — HPLC, LC-MS, ICP-MS
- Certificate of Analysis (COA) issued per batch
- MSDS available on request
- Research Use Only labelling included
- Full export documentation provided
See our Lab Testing & QA page for full methodology detail.
Who Orders Wholesale MK-677
- Supplement brands — anti-ageing, sleep, and performance capsule formulations
- Sports nutrition retailers — shelf-ready capsules for resale
- Research institutions — raw powder for GH secretagogue studies
- Clinics & wellness businesses — GH-axis research programmes
- E-commerce operators — private label SARMs and GHS brands
- Distributors — bulk powder for regional distribution across EU and UK
See our Industries We Serve page for full B2B client detail.
Related Compounds
Buyers sourcing MK-677 frequently also order:
- Ostarine (MK-2866) — most widely studied SARM, commonly paired in research stacks
- Ligandrol (LGD-4033) — strong anabolic profile, frequently combined with MK-677
- RAD-140 (Testolone) — high selectivity, popular in research stacks
- Cardarine (GW-501516) — metabolic research compound, commonly sourced alongside MK-677
For peptides with complementary GH-axis mechanisms, visit our sister site Peptide-Direct.
Frequently Asked Questions
What is the CAS number for MK-677 (Ibutamoren)?
The CAS number for MK-677 is 159752-10-0.
Is MK-677 a SARM?
Technically, no. MK-677 is a growth hormone secretagogue — a ghrelin receptor agonist — not a selective androgen receptor modulator. It is commonly supplied alongside SARMs due to its complementary research applications and commercial demand in the same market.
What purity is your wholesale MK-677?
Our MK-677 consistently tests at ≥98% purity, verified by HPLC and LC-MS. A COA from an independent EU-accredited laboratory is available for every batch.
What formats is wholesale MK-677 available in?
Raw powder (MOQ 10g), encapsulated in 10mg and 25mg doses (MOQ 1,000 units), and liquid suspension (MOQ on request). White label options available for all formats.
What is the minimum order quantity?
Raw powder: 10g minimum. Capsules: 1,000 units per dosage strength. White label: 1,000 units per SKU.
Do you ship wholesale MK-677 internationally?
Yes — to the EU, UK, USA, Canada, Australia, and other markets. All shipments include compliant customs documentation, COA, and research-use labelling. See our Shipping & Logistics page for country detail.
COAs, pricing, and samples available on request. B2B enquiries only.
