Bulking Bundle
Maximum Mass Building Stack
£175.00 £195.00
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What’s Included
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1x YK-11 (Myostine) - 60 capsules -
1x Ligandrol (LGD4033) - 60 capsules
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1x Testolone (RAD140) - 60 capsules
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1x Ibutamoren (MK677) - 60 capsules
Lab Tested
Third-party verified
Fast Shipping
3-7 business days
24/7 Support
Expert guidance
Product details
The most powerful bulking stack available, combining the most potent muscle-building compounds for maximum mass gains. This elite stack includes YK11, Ligandrol, Testolone, and Ibutamoren, designed for serious athletes seeking extraordinary muscle growth.
Each product is manufactured to pharmaceutical standards and third-party tested for purity. This stack is reserved for experienced users who demand the ultimate in muscle-building potential and are ready for dramatic transformation.
Active Ingredients
Purity & Quality
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Third-party lab tested -
99%+ purity guaranteed -
24-month shelf life
This stack represents the pinnacle of muscle-building supplementation, combining myostatin inhibition with powerful anabolic SARMs and growth hormone support. YK-11 removes genetic limitations on muscle growth, while Ligandrol and Testolone provide massive anabolic effects.
Ibutamoren supports the entire process through enhanced growth hormone release, improving recovery, sleep quality, and overall anabolic environment. The combination creates an unprecedented muscle-building effect that far exceeds natural limitations.
Users experience rapid muscle growth, dramatic strength increases, improved recovery, and substantial changes in physique within weeks of starting this stack.
Key Actions
A High-Quality Bulking Stack
Are you tired of finding questionable-quality bulking SARMs? Our bundle includes compounds tested for purity by a third-party laboratory. Each comes with a certificate confirming its quality. Still unsure? See our lab test results!
At CORE SARMS, we offer you pure compounds – free of fillers that could impact the bulking effects or cause harm. We prioritise transparency so that you can verify the SARMs and make an informed decision. See our other muscle-building SARMs.
This is the most advanced stack in the catalogue, built for users who’ve already run individual SARM cycles. Compare it against other bulking options in Best SARMs for Bulking.
Real results from real customers
Transformations from verified customers. Individual results vary.
Reviews
Rated 4.9 by verified UK buyers.
What are the Key Benefits of SARMs Bulking Bundle?
Explosive muscle growth
Massive strength gains
Enhanced recovery
Myostatin inhibition
Improved sleep quality
Maximum muscle density
How to Use SARMs Bulking Bundle?
Dosage
YK‑11: 10-20 mg — split into two 5-10 mg doses, MK‑677: 20 mg, RAD‑140: 20 mg, LGD‑4033: 10-20 mg
Timing
Morning: first dose of YK-11 + LGD-4033 + RAD-140 => Evening: Second dose of YK-11 => 30 to 60 minutes before bed: MK-677
Cycle Length
6-8 weeks followed by a 4-week break
Important
Dietary supplement use only
For experienced users only. Monitor response closely and consider PCT.
Training
Focus on low-rep, high-weight sets: 3–5 sets of 3–6 reps per main lift. Add 1–2 accessory exercises per muscle group for extra volume. Take 2–3 full rest days each week. YK-11 puts extra strain on joints and tendons. Include mobility work to prevent stiffness.
Diet
Eat at a surplus of 400–600 calories above maintenance. Protein: 2.2–2.6g per kg of body weight daily. Add omega-3s from fish oil or flaxseed to protect joints and cholesterol. Eat more frequent meals to match the increased appetite from MK-677.
Goal
This bundle is built for maximum lean mass and strength gains, aimed at breaking through stubborn plateaus.
Who Can Use This Bundle?
For advanced users only, who have already run individual SARM cycles and know how their body responds.
How to Run?
Take YK-11, LGD-4033, and RAD-140 together each morning, with a second YK-11 dose in the evening and MK-677 30–60 minutes before bed. Run for 6 to 8 weeks, since YK-11 is potent and shouldn't be extended. Follow up 5 to 7 days after the cycle with a mandatory PCT.
Universal Rules for SARMs Stacking
Get your baseline bloodwork done before starting, check again 2 weeks into the cycle, and do a final test 2 weeks after PCT finishes. Use liver support, cholesterol aids, and electrolytes for the full duration. After finishing any cycle or stack, take a complete break of at least 12 weeks before starting another.
The CORE SARMS Handbook walks through dosing, cycle length, and stacking logic for every compound on this page.
Read the CORE SARMs Handbook →Post-cycle support
Frequently Asked Questions
Contact supportThe bundle includes YK-11 (Myostine), Ligandrol (LGD4033), Testolone (RAD140), and Ibutamoren (MK677) – the ultimate bulking stack.
Advanced users typically gain 20-30 pounds of muscle during a 6-8 week cycle with this powerful stack.
No, this is an advanced stack for experienced users who have completed multiple SARM cycles and understand their response.
While generally well-tolerated when used responsibly, some users may experience mild effects such as increased appetite, water retention, or temporary fatigue. It’s important to follow recommended dosages and monitor your body’s response throughout the cycle.
Use a substantial caloric surplus with high protein intake (1.5g per lb bodyweight) to maximize the muscle-building potential.
The typical cycle lasts between 8 and 12 weeks. Due to health concerns, it is advised not to exceed the duration of the cycle due to the high stress caused on your organs and the potential to diminish the effects of the SARMs.
Yes, you should follow your cycle up with a post-cycle therapy. Ideally, the cycle should last 2-4 weeks, depending on the time you need to recover. Consider taking a PCT supplement to aid your body in restoring natural hormone levels.
Follow the instructions provided with each compound. Start with smaller doses to evaluate the effect of each SARM on your body.
You can stack the SARMs from our bundle with everyday essentials, like protein or vitamins. However, you should not stack them with other hormonal compounds. If in any doubt, consult a healthcare professional.
Don’t panic – it happens to the best of us. If you realise you’ve missed a dose, take it as soon as you remember. If it is nearly time for your next dose, simply skip the missed one and continue with your regular schedule. Never double up to “make up” for a missed intake.
Looking for something else?
Is maintain lean muscle mass and strength during caloric restriction your primary goal? Explore Cutting Bundle available at CORE SARMS.
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