Ibutamoren (MK 677)
Growth Hormone Secretagogue
£48.00 £60.00
Save 20%
What’s Included
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60 capsules per bottle -
10mg pure MK677 per capsule
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2-month supply (1 cap daily)
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Third-party lab certificate included
Lab Tested
Third-party verified
Fast Shipping
3-7 business days
24/7 Support
Expert guidance
Product details
CORE supplies MK 677 (Ibutamoren) in the UK: 60 capsules of 10mg each, with a third-party lab certificate included. MK 677 is an orally active growth hormone secretagogue that mimics the action of ghrelin.
Buy MK677 UK stock with confidence: our Ibutamoren MK 677 capsules come with a third-party lab certificate for every Ibutamoren UK order.
Our premium MK677 is manufactured in state-of-the-art facilities and undergoes rigorous third-party testing to ensure maximum purity and potency. Each capsule contains 10mg of pure Ibutamoren, providing consistent and reliable results for your fitness goals.
Active Ingredients
Purity & Quality
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Third-party lab tested -
99.2%+ purity guaranteed -
24-month shelf life
MK677 Ibutamoren works by mimicking the action of ghrelin, a hormone that regulates hunger and growth hormone release. When MK677 binds to ghrelin receptors in the brain, it triggers the release of growth hormone from the pituitary gland.
This increase in growth hormone leads to elevated levels of IGF-1, which is responsible for many of the compound’s beneficial effects, including increased muscle mass, improved bone density, and enhanced recovery.
IGF-1 activity is closely tied to sleep – its increase is associated with longer periods of deep sleep and REM phase. This has been confirmed in controlled studies on the effects of MK677.[1] The connection makes sense from a physiological perspective, as the body naturally releases growth hormone during overnight recovery phases. Hence, the patterns and impact of this compound are frequently researched.
The compound has a half-life of approximately 24 hours, allowing for once-daily dosing while maintaining stable hormone levels throughout the day. The optimal use includes intake before bedtime. However, it may also be taken in the morning.
Key Actions
MK-677 raises natural growth hormone levels rather than acting on androgen receptors. Get the full picture in MK 677 side effects, benefits and dosage guide.
See what our customers achieved
Transformations from verified customers. Individual results vary.
Reviews
Rated 4.9 by verified UK buyers.
What are the Key Benefits of MK 677 (Ibutamoren)?
Enhanced muscle growth
Improved sleep quality
Increased bone density
Anti-aging effects
Faster recovery
Improved skin quality
How to Use MK 677 (Ibutamoren)?
Dosage
10mg once daily
Timing
Take before bedtime for optimal results
Cycle Length
8-12 weeks followed by 4-week break
Important
Dietary supplement use only
Take with or without food. Consistent timing recommended for best results.
Training
Build around progressive overload. Faster recovery means you can often train more frequently without burning out.
Diet
Add 250–500 calories above your usual intake. Aim for 1.6–2.2g of protein per kg of body weight, include plenty of fiber, and keep an eye on blood sugar.
Stacking and cycle guidance
MK-677 fits into almost any protocol thanks to its non-suppressive profile. Pick a single companion below to stack with MK-677 and save 5%, or choose a complete bundle further down for a bigger discount:
RAD 140 (Testolone) + Ibutamoren (MK 677)
Recovery: MK-677 lifts GH and IGF-1 output so a strength-focused cycle recovers faster.
£93.10 £98.00 Save 5%
MK-677 10-25mg, 30-60 minutes before bed. RAD-140 5-15mg each morning. Run together for 8-12 weeks. PCT still required for the RAD-140 portion.
RAD 140 dosage and side effects guide
Ostarine (MK 2866) + Ibutamoren (MK 677)
Recomposition: Ostarine's lean muscle-and-fat-loss profile pairs well with MK-677's round-the-clock support.
£88.35 £93.00 Save 5%
Ostarine 15-20mg each morning. MK-677 10-25mg, 30-60 minutes before bed. Run together for 8-12 weeks. PCT optional for the Ostarine portion depending on dose.
Cardarine (GW501516) + Ibutamoren (MK 677)
Endurance and recovery: Cardarine's endurance boost pairs with MK-677's recovery support for high-volume training blocks.
£93.10 £98.00 Save 5%
MK-677 10-25mg, 30-60 minutes before bed. Cardarine 5-10mg, 1-2 hours before training. Run together for 8-12 weeks. No PCT required for either compound alone.
Ligandrol (LGD 4033) + Ibutamoren (MK 677)
Bulking: LGD-4033 drives lean mass gains while MK-677 keeps recovery and sleep quality high through the cycle.
£88.35 £93.00 Save 5%
MK-677 10-25mg, 30-60 minutes before bed. LGD-4033 5-10mg each morning. Run together for 8-12 weeks. PCT still required for the LGD-4033 portion.
Ligandrol dosage and cycle guide
Complete Bundles
Prefer a full protocol in one order? These pre-built bundles pair Ibutamoren (MK-677) with 3-4 companions at a bigger combined discount:
Muscle Building Bundle
Complete stack: RAD-140, LGD-4033, Ostarine, and MK-677 bundled for less than buying each on its own.
£165.00 £185.00 Save 11%
LGD-4033 10-20mg, RAD-140 20mg, and Ostarine 20mg together each morning; MK-677 20mg before bed. Run for 8 weeks, never longer than 10. PCT required after.
Bulking Bundle
Complete stack: RAD-140, YK-11, LGD-4033, and MK-677 bundled for maximum bulking power, priced below buying each alone.
£175.00 £195.00 Save 10%
YK-11, LGD-4033, and RAD-140 (20mg each) together each morning, a second YK-11 dose in the evening, MK-677 20mg before bed. 6-8 weeks max. PCT required after.
The CORE Handbook walks through dosing, cycle length, and stacking logic for every compound on this page.
Read the CORE Handbook →Post-cycle support
Frequently Asked Questions
Contact supportMK677 Ibutamoren is a growth hormone secretagogue that stimulates the release of growth hormone and IGF-1, supporting muscle growth, fat loss, and recovery.
No, MK-677 is not a steroid. It does not act on androgen receptors. Instead, it naturally boosts growth hormone and IGF-1 production, helping improve muscle recovery and performance.
Some users of MK-677 report increased appetite, temporary fatigue, or mild water retention. Experiences vary from person to person, and not everyone notices these effects.
Most users notice improvements in sleep, recovery, and appetite within the first week. Muscle growth and fat loss benefits typically become more visible after 4-6 weeks of consistent use with proper diet and training routines.
Store the product in a cool, dry place away from direct sunlight. Keep the container tightly sealed and out of reach of children. When stored properly, the product has a shelf life of up to 24 months from the manufacturing date.
Yes, all our products undergo rigorous third-party testing for purity, potency, and quality assurance.
No, MK-677 typically does not suppress testosterone levels. Its effects are centered around growth hormone pathways, not testosterone regulation. However, individual responses may vary with prolonged use.
A common cycle length for MK-677 is 8-12 weeks, followed by a 4-week break. Some experienced users extend cycles up to 16-20 weeks. Consistent use during the cycle can help you achieve optimal results.
MK-677 is typically taken once daily, preferably before bedtime for optimal results. A common daily dosage ranges from 10-25 mg, depending on individual goals and experience. It can be taken with or without food, but keeping the timing consistent each day helps maintain steady levels in the body.
Yes – according to research, MK677 may have a positive impact on sleep for both younger and older adults. G Copinschi and other researchers found that the use of MK677 may prolong the stage IV sleep by up to 50% and the REM stage by over 20% in young adults, and by almost 50% in older users.[1]
Yes, the research, Two-Month Treatment of Obese Subjects with the Oral Growth Hormone (GH) Secretagogue MK-677 Increases GH Secretion, Fat-Free Mass, and Energy Expenditure, conducted in 1998, proved that MK677 may help reduce body fat and change body mass composition when taken orally.[2]
MK677 may be combined with other compounds; however, the effects of concurrent use have not been extensively studied in controlled human settings. Substances that influence hormonal balance, metabolism, sleep patterns, or glucose regulation may interact in ways that vary between individuals, particularly where existing health conditions or medications are involved. Consider consulting with a trained healthcare professional before stacking this compound.
You can buy MK677 UK directly from CORE: our MK 677 UK customers receive 60 x 10mg Ibutamoren capsules with a third-party lab certificate.
Looking for something else?
Is your primary goal muscle strength? Explore other options and see RAD-140 (Testolone) available at CORE.
Related products
Muscle Building Bundle
Complete muscle building stack: Ligandrol, Testolone, Ostarine, Ibutamoren
References:
- Copinschi, G., Leproult, R., Van Onderbergen, A., Caufriez, A., Cole, K. Y., Schilling, L. M., Mendel, C. M., De Lepeleire, I., Bolognese, J. A., & Van Cauter, E. (1997). Prolonged oral treatment with MK-677, a novel growth hormone secretagogue, improves sleep quality in man. Neuroendocrinology, 66(4), 278–286. https://doi.org/10.1159/000127249
- J. Svensson, L. Lönn, J.-O. Jansson, G. Murphy, D. Wyss, D. Krupa, K. Cerchio, W. Polvino, B. Gertz, I. Boseaus, L. Sjöström, B.-Å. Bengtsson, Two-Month Treatment of Obese Subjects with the Oral Growth Hormone (GH) Secretagogue MK-677 Increases GH Secretion, Fat-Free Mass, and Energy Expenditure, The Journal of Clinical Endocrinology & Metabolism, Volume 83, Issue 2, 1 February 1998, Pages 362–369, https://doi.org/10.1210/jcem.83.2.4539
