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Project X Mk-677

Project X 60 caps

Original price was: £47.25.Current price is: £42.25.Save 11%Tax includedLowest price in 30 days: £42.25

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Project X Mk677 by Project X is a high-strength MK-677 (Ibutamoren) formula designed for experienced users focused on optimising growth hormone pathways, improving recovery, and supporting lean muscle development. Each bottle contains 60 capsules with a precise dose per capsule, formulated for consistent daily use within structured supplementation protocols.

Key Benefits



  • Growth Hormone Pathway Support

  • Enhanced Recovery

  • Improved Sleep Quality

  • Lean Muscle & Body Composition Support

  • Appetite Regulation


Intended User


This product is intended for experienced adult users aged 21 and over who are familiar with structured supplementation routines.

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Project X Mk677 is a high-strength MK-677 (Ibutamoren) formula by Project X, designed for experienced users focused on optimising growth hormone pathways, improving recovery, and supporting lean muscle development. Each bottle contains 60 capsules for consistent daily use.

MK-677, also known as Ibutamoren, is a non-peptide growth hormone secretagogue that stimulates the release of growth hormone (GH) and increases IGF-1 levels by interacting with ghrelin receptors. It is widely used for its recovery, sleep quality, and muscle support properties.

Project X Mk677 supports growth hormone pathway signalling, enhanced recovery from training, improved sleep quality, lean muscle and body composition support, and appetite regulation. The capsule format provides convenient and consistent daily dosing.

Take the recommended daily dose as directed, preferably in the evening before bed. MK-677 cycles typically run 8–16 weeks. Always consult a healthcare professional before starting and monitor health markers regularly throughout the cycle.

Project X Mk677 is intended for experienced adult users aged 21 and over who are familiar with MK-677 supplementation and growth hormone-support protocols. It is not suitable for beginners or individuals with pre-existing health conditions.

No. This is a high-strength MK-677 formula intended for experienced users. Those without prior experience with growth hormone secretagogues should consult a healthcare professional before use.

MK-677 is frequently stacked with SARMs or prohormone compounds to enhance overall recovery, muscle growth, and body composition results. Any stacking approach should be carefully planned and a healthcare professional consulted before combining active compounds.

The active ingredient is MK-677 (Ibutamoren), a non-peptide growth hormone secretagogue. Additional excipients support capsule stability and consistent delivery. Each bottle contains 60 capsules.

MK-677 may cause increased appetite, mild water retention, and temporary changes in blood glucose or insulin sensitivity. It is not suitable for individuals with diabetes or metabolic conditions. Regular monitoring and consultation with a healthcare professional is strongly advised.

Project X Mk677 is available through Cross The Limits, an authorised UK retailer. Orders placed before 4pm are dispatched the same day, with free UK shipping on orders over £89.

Project X

Project X

Cross the Limits is proud to stock an expansive product line from Project X supplements. This brand is celebrated as the home of the best SARMs in Europe. Engineered for modern athletes and those who desire the most out of their physiques, Project X combines rigorous science with innovative natural compounds to fuel muscle growth and accelerate fat loss – all with the goal of chasing aesthetic perfection. If you’re seeking advanced, research-backed performance support, Project X delivers the cutting-edge solutions you need to dominate every workout and transform your physique.