Selective Androgen Receptor Modulators (SARMs) have gained immense popularity in the bodybuilding world for their muscle-building potential without the extreme side effects of anabolic steroids. Among them, YK-11 and RAD-140 (Testolone) stand out as two of the most potent options for those looking to maximize muscle growth and strength.
But how do they compare? Understanding the key differences between YK-11 and RAD-140 is crucial for choosing the right compound for your specific fitness goals. In this article, we’ll dive deep into their mechanisms of action, benefits, side effects, and overall effectiveness in building muscle.
What is YK-11?
Mechanism of Action
YK-11 is a unique SARM with steroidal properties that makes it stand out from other compounds in this category. It works by inhibiting myostatin, a protein that limits muscle growth, while simultaneously increasing follistatin levels. This dual action leads to rapid muscle gains and enhanced muscle retention over time.
Primary Benefits
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Significant muscle mass gains – Ideal for those focused on aggressive bulking.
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Enhanced bone density – Supports stronger bones alongside muscle development.
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Improved muscle retention – Helps maintain lean gains post-cycle.
Potential Side Effects
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Liver toxicity – Due to its steroidal nature, YK-11 may put stress on the liver.
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Testosterone suppression – Requires a proper post-cycle therapy (PCT).
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Joint pain – Some users report discomfort in the joints.
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Possible hair loss – Can accelerate male pattern baldness in predisposed individuals.
What is RAD-140 (Testolone)?
Mechanism of Action
RAD-140 is a non-steroidal SARM that selectively binds to androgen receptors in muscle and bone tissue, mimicking the effects of testosterone without excessive androgenic side effects. This makes it a popular choice for those looking for a balance between muscle growth and strength enhancement.
Primary Benefits
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Lean muscle growth – Builds muscle mass while keeping fat gain minimal.
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Strength increase – Noticeable improvements in lifting power.
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Neuroprotective properties – Preclinical studies suggest it may have cognitive benefits.
Potential Side Effects
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Mild testosterone suppression – While less severe than YK-11, a PCT is still recommended.
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Liver strain – Some users report mild liver stress, though not as severe as YK-11.
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Water retention – Can cause slight bloating in some individuals.
YK-11 vs RAD 140 Benefits
Half-life
The time it takes for a particular SARM or steroid to leave your body to produce the intended effects is known as half life. The half life of RAD 140 is much longer than that of YK 11.
The half lives of these two SARMs are very different. RAD 140 takes 60 hours to clear out, while YK 11 only has a 12-hour lifespan in your body.
With a half life of only 12 hours, you need to take two doses of YK 11 every day for maximum yield.
RAD 140 has a key advantage over YK 11. Its half life is long: 60 hours. This means even if you miss one dose, it will still be present within your system and produce desired effects.
Let’s go through the advantages of both of these SARMs one by one so you can make an informed decision about which one is right for your needs.
Build Muscle Mass
When it comes to muscle growth, there is no other SARM that can compare with YK 11. This drug increases anabolic activity in your body. It also stops myostatin from limiting the size of our muscles, something we all want.
The evidence suggests that YK 11 is more potent than RAD 140 when it comes to building muscle mass.
The powerful YK-11 gains in muscle mass have been proven by anecdotal evidence.
It is possible to gain 15 pounds of lean tissue within just 8 weeks when compared with RAD 140. This could help you achieve a maximum of 10 lbs on your frame over similar time periods.
You can use these two powerful SARMs in a stack with other steroids for faster bulking effects. RAD 140 Stacks are great when you want to pack on some mass, cut it away later or just change your body composition.
Increased Strength
YK 11 has been proven to be stronger than its counterpart, RAD 140.
When you’re on a YK 11 cycle, it’s likely that your strength will increase more than with a RAD 140 cycle.
The effects of YK 11 are not as intense or mood altering, making it a better option for those who want less extreme changes.
Fat Burning
If you want to get more vascular, then YK 11 and Testolone are both good options. Nonetheless, RAD 140 is the best in enhancing this aspect of your bodybuilding routine. Its results in an increased amount or visibility for veins on the skin, which gym enthusiasts love seeing.
Though YK 11 is effective at increasing muscle mass, it lacks the ability to burn fat. But with Testolone or RAD 140 in your body and boosting metabolism like never before you could achieve a sleek, firm look all year round.
This powerful SARM can be used during bulking cycles or cutting phases. It’s an excellent choice for body recomposition techniques too.
Better Motivation
The more power you have, the better your motivation will be. A person with little strength might not care about lifting heavier and harder. They might feel like it’s beneath them. But someone who is strong feels empowered by increasing his/her physical ability. This way, they can take on life head-on without fear.
The key difference between these two supplements is the motivator. YK 11 tends to be better as it provides a sense of urgency while Testolone RAD 140 does not have this effect on people’s motivation level.
When on this SARM, you feel like a champion at the gym and it’s hard not to drag yourself there every day.
Key Differences Between YK-11 and RAD-140
Muscle Growth
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YK-11: More potent for muscle hypertrophy due to myostatin inhibition.
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RAD-140: Builds muscle effectively but at a slightly slower rate than YK-11.
Strength Gains
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YK-11: Moderate strength gains.
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RAD-140: Superior strength gains compared to YK-11.
Cycle Duration
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YK-11: Typically 6–8 weeks.
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RAD-140: Typically 8–12 weeks.
Half-Life
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YK-11: 6–10 hours.
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RAD-140: 12–18 hours.
Which is Better for Muscle Growth?
YK-11 Advantages:
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Best for users aiming for extreme muscle mass gains.
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Works well in bulking cycles due to myostatin inhibition.
RAD-140 Advantages:
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Provides a more balanced approach to muscle and strength gains.
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Suitable for both bulking and cutting phases.
Side Effects Comparison
YK-11 Side Effects:
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More severe testosterone suppression.
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Higher liver toxicity risk.
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Potential joint discomfort.
RAD-140 Side Effects:
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Milder testosterone suppression.
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Less risk of liver damage.
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Minimal joint issues compared to YK-11.
TESTOL 140
Features:
- Massive Muscle Gains
- increased Testosterone
- Faster Metabolism
- More Strength
- Faster Recovery
- No Side Effects
- 100% Money Back Guarantee
YKBULK
Features:
- Great for Muscle Gains
- Increased Strength
- More ability for cardio
- Faster Recovery
- Great For Bulking
- No Side Effects
- 100% Money Back Guarantee
Stacking YK-11 and RAD-140
Why Stack Them?
Combining YK-11 and RAD-140 can amplify results by merging YK-11’s myostatin inhibition with RAD-140’s testosterone-mimicking effects. This stack is particularly effective for advanced users looking to maximize muscle gains and strength.
Sample Stack Cycle:
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Weeks 1–4: YK-11 (5mg/day) + RAD-140 (10mg/day).
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Weeks 5–8: YK-11 (10mg/day) + RAD-140 (15mg/day).
Note: Due to potential suppression, a robust PCT is required post-cycle.
Who Should Use YK-11 or RAD-140?
YK-11 is Best For:
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Advanced bodybuilders focused on extreme bulking.
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Users willing to manage potential side effects with PCT and liver support.
RAD-140 is Best For:
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Beginners or intermediate users seeking a balance of muscle and strength.
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Individuals looking for a versatile SARM for both bulking and cutting.
Legal Status and Safety Considerations
Neither YK-11 nor RAD-140 is FDA-approved for human consumption. They are classified as research chemicals and are banned in competitive sports by WADA due to their performance-enhancing effects. Always consult a medical professional before considering their use.
Conclusion
Both YK-11 and RAD-140 offer powerful muscle-building benefits but cater to different needs. YK-11 is the go-to for extreme muscle mass, while RAD-140 provides a more balanced approach to muscle and strength gains. Understanding their unique mechanisms, side effects, and ideal applications can help users make an informed decision based on their fitness goals.
Regardless of your choice, always prioritize safety, proper cycle planning, and post-cycle recovery to maximize results while minimizing risks.
Hi, I'm Dave Moffat the founder and Chief Editor of steroidsourcetalk.com and certified International Personal Trainer and Certified Nutritionist. My passion has always been bodybuilding but with 15 years' experience in weight loss programs too, it's hard not to mention all that when you're working at your fitness level fullest (I hope). When Im not in the gym or spending time away from my family i often think about what advice would help others achieve theirs goals just like these inspired mine.
