SARMs Guide: MK-677, RAD-140, Cardarine, Ostarine, and More – Everything You Need to Know

SARMs (Selective Androgen Receptor Modulators) have exploded in popularity in the bodybuilding and fitness world over the last few years. With milder side effects compared to steroids, targeted effects, and oral convenience, millions of users are turning to SARMs for their fitness goals.

But what exactly are SARMs? Do they really work? What are the side effects? Which one does what? What's the difference between MK-677 and RAD-140? In this article, I'll break down everything you need to know about SARMs – from what they are and how they work, to popular SARM types, dosages, side effects, and more – in the simplest and most understandable way possible.

Let's dive in.

What Are SARMs?

SARMs stands for Selective Androgen Receptor Modulators. They are a class of compounds that selectively bind to androgen receptors in the body (found in muscle and bone tissue) to produce anabolic effects.

Difference Between SARMs and Steroids:

Advantages of SARMs:

• Oral administration (no injections)

• Fewer side effects compared to steroids

• Targeted effects (muscle and bone)

• Faster onset of action

Disadvantages of SARMs:

• Still in research phase (limited human studies)

• No long-term safety data

• Can suppress natural testosterone

• Legal status is unclear in many countries

Most Popular SARMs Products

1. MK-677 (Ibutamoren)

What does it do? MK-677 is NOT a SARM – it's a growth hormone secretagogue. It increases growth hormone and IGF-1 levels, which positively affects muscle mass, bone density, and sleep quality.

Effects:

• Increased growth hormone and IGF-1

• Muscle mass increase

• Bone density increase

• Improved sleep quality

• Shorter recovery time

• Increased appetite (for some users)

Dosage: 10-25 mg/day (typically taken in the morning or evening)

Side Effects:

• Insulin resistance (elevated blood sugar)

• Increased appetite (may cause weight gain)

• Water retention

• Drowsiness / fatigue

Cycle Length: 8-12 weeks (some users run it for 6 months)

PCT: MK-677 does not suppress natural testosterone, so PCT is not required. But blood sugar monitoring is essential.

2. RAD-140 (Testolone)

What does it do? RAD-140 is one of the most powerful SARMs. It's used for muscle mass and strength gains, producing steroid-like effects.

Effects:

• Muscle mass increase

• Strength increase

• Fat loss

• Bone density increase

Dosage: 10-30 mg/day (recommended starting dose for men: 10 mg/day)

Side Effects:

• Natural testosterone suppression (moderate-severe)

• Hair loss (if genetically predisposed)

• Acne

• Elevated liver enzymes (mild)

Cycle Length: 6-8 weeks

PCT: Required. PCT with Clomid or Nolvadex after the cycle.

3. Cardarine (GW-501516)

What does it do? Cardarine is NOT a SARM – it's a PPARδ agonist. It's used for fat loss and endurance enhancement. Users often describe Cardarine as "cardio-friendly."

Effects:

• Fat loss

• Endurance increase

• Cardio performance increase

• HDL cholesterol increase

Dosage: 10-20 mg/day (recommended starting dose for men: 10 mg/day)

Side Effects:

• No natural testosterone suppression

• Rare: headache, nausea

Cycle Length: 8-12 weeks

PCT: Not required.

4. Ostarine (MK-2866)

What does it do? Ostarine is one of the mildest SARMs. It's used for muscle preservation and mild muscle gain, often preferred during cutting phases.

Effects:

• Mild muscle gain

• Muscle preservation

• Joint recovery

• Bone density increase

Dosage: 10-25 mg/day (recommended starting dose for men: 10 mg/day)

Side Effects:

• Natural testosterone suppression (mild)

• Mild liver enzyme elevation

Cycle Length: 6-8 weeks

PCT: Not required at low doses (10 mg). Required at higher doses (20+ mg).

5. Ligandrol (LGD-4033)

What does it do? LGD-4033 is a powerful SARM used for muscle mass and strength gains. Stronger than Ostarine, slightly weaker than RAD-140.

Effects:

• Muscle mass increase

• Strength increase

• Bone density increase

Dosage: 5-10 mg/day (recommended starting dose for men: 5 mg/day)

Side Effects:

• Natural testosterone suppression (moderate)

• Water retention (mild)

Cycle Length: 6-8 weeks

PCT: Required. PCT with Clomid or Nolvadex after the cycle.

6. YK-11

What does it do? YK-11 is one of the most powerful SARMs. It works as a myostatin inhibitor, promising incredible muscle gains. But it comes with serious side effects.

Effects:

• Muscle mass increase

• Myostatin suppression

• Strength increase

Dosage: 5-15 mg/day

Side Effects:

• Severe testosterone suppression

• Liver toxicity

• Hair loss

• Acne

Cycle Length: 4-6 weeks

PCT: Absolutely required.

7. Andarine (S4)

What does it do? Andarine is a milder SARM used for cutting and fat loss. It's known for its muscle-hardening effects.

Effects:

• Fat loss

• Muscle hardening

• Increased vascularity

Dosage: 25-50 mg/day (split into 2 doses)

Side Effects:

• Vision issues (yellow tint, night blindness – reversible)

• Natural testosterone suppression (mild-moderate)

Cycle Length: 6-8 weeks

PCT: Required at higher doses.

SARMs Cycle Planning

Beginner Cycle Example (8 Weeks)

Intermediate Cycle Example (8 Weeks)

Advanced Cycle Example (8 Weeks)

SARMs and PCT (Post-Cycle Therapy)

Some SARMs (RAD-140, LGD-4033, YK-11) suppress natural testosterone production. Therefore, PCT is essential after the cycle.

PCT Protocol:

• Clomid: 50 mg/day (first 2 weeks), 25 mg/day (last 2 weeks)

• Nolvadex: 20 mg/day (first 2 weeks), 10 mg/day (last 2 weeks)

• Duration: 4 weeks

When to start PCT? Immediately after the cycle ends.

SARMs Side Effects and Risks

Natural Testosterone Suppression

• RAD-140 and LGD-4033 are most suppressive

• Ostarine is milder

• MK-677 and Cardarine do not suppress

Liver Toxicity

• YK-11 is most toxic

• RAD-140 is moderate

• Ostarine and Cardarine are low

Hair Loss

• RAD-140 and YK-11 have high risk of hair loss

• Depends on genetic predisposition

Acne

• Increases with higher doses

Frequently Asked Questions About SARMs

1. What are SARMs?

Selective Androgen Receptor Modulators. They selectively target muscle and bone tissue.

2. What's the difference between SARMs and steroids?

SARMs are more selective and have fewer side effects.

3. Are SARMs legal?

In most countries, including Turkey, they are not approved for human use. Research purposes only.

4. Do SARMs suppress natural testosterone?

Yes, some are suppressive (RAD-140, YK-11), others are milder (Ostarine).

5. Are SARMs liver toxic?

YK-11 and RAD-140 can elevate liver enzymes.

6. Is MK-677 a SARM?

No. It's a growth hormone secretagogue.

7. Is Cardarine a SARM?

No. It's a PPARδ agonist.

8. How much weight can you gain with SARMs?

Depends on the compound. RAD-140 can deliver 3-6 kg of muscle gain.

9. Can you burn fat with SARMs?

Cardarine and Ostarine support fat loss.

10. Is PCT required with SARMs?

Yes, for RAD-140, LGD-4033, and YK-11. Not required for Ostarine (low dose) and Cardarine.

11. How are SARMs taken?

Orally, with or without food.

12. Are SARMs safe?

Short-term studies suggest they are safe. No long-term data available.

13. Can you drink alcohol with SARMs?

Not recommended. Adds to liver stress.

14. Can you use testosterone with SARMs?

Yes, they can be stacked with a testosterone base.

15. Do you need an AI with SARMs?

No, SARMs do not aromatize.

16. Can you train on SARMs?

Yes, they enhance training capacity.

17. What about nutrition on SARMs?

High protein and calorie intake are essential.

18. Can you do cardio on SARMs?

Cardarine specifically enhances cardio capacity.

19. Do SARMs affect sleep?

MK-677 improves sleep quality.

20. Can women use SARMs?

Yes, especially Ostarine and Cardarine are suitable for women.

21. How quickly do SARMs work?

Within 1-2 weeks.

22. How should SARMs be stored?

In a cool, dry place, away from children.

23. How much do SARMs cost?

Varies. A full cycle typically costs $100-300.

24. Can you use creatine with SARMs?

Yes.

25. Do SARMs cause sleep issues?

Generally no, except for MK-677.

26. Is blood work required with SARMs?

Yes, pre and post-cycle.

27. Are there scientific studies on SARMs?

Yes, most are animal studies. Human studies are limited.

28. Do SARMs cause gynecomastia?

No, SARMs do not aromatize.

29. Do SARMs cause hair loss?

RAD-140 and YK-11 can cause hair loss if genetically predisposed.

30. Which SARMs are best for beginners?

Ostarine (MK-2866) and Cardarine (GW-501516) are recommended for beginners.

31. Which SARMs are best for cutting?

Cardarine, Ostarine, and Andarine.

32. Which SARMs are best for bulking?

RAD-140, LGD-4033, and YK-11.

33. Do SARMs show up on drug tests?

WADA bans SARMs. Athletes can be tested.

34. Can I stack SARMs?

Yes, common stacks include Cardarine + Ostarine, RAD-140 + Cardarine.

35. What is the best SARMs stack?

Depends on goals. RAD-140 + Cardarine + MK-677 is popular for bulking.

Final Verdict: Are SARMs Worth It?

SARMs are popular due to their milder side effects compared to steroids, oral convenience, and targeted effects. But remember: They are still in the research phase. Long-term safety is not proven.

If you decide to use them:

• Get blood work done.

• Don't overdo the dosage.

• Prepare PCT if needed.

• Use liver support supplements.

Remember: Your health comes first. Short-term gains are not worth long-term health problems.

Product Link

Product Link: You can find the best quality SARMs [here] .