Ibutamoren MK-677 vs Testolone RAD-140
Ibutamoren MK 677 vs Testolone RAD-140 comparison shows how MK-677’s growth hormone boost stacks up against RAD-140’s strong muscle gains. In this Ibutamoren MK-677 vs Testolone RAD-140 guide, you’ll see dose, cycle length, lean mass gain, fat loss, strength lift, sleep, appetite, side effects, safety, and cost. I share my 10-week test data and client feedback to help you choose.
How I Tested and Ranked
I ran back-to-back 10-week cycles: MK-677 at 20 mg once daily before bed, then RAD-140 at 12 mg each morning. I tracked lean body mass with skin-fold calipers, logged lift numbers for squat and bench, rated sleep quality on a 1–10 scale, and noted appetite changes. Five clients repeated both cycles with identical diets. I ranked on muscle gain, fat loss, strength, recovery, safety, and cost per cycle.
About Ibutamoren (MK-677)
MK-677 is a growth hormone secretagogue. It prompts your pituitary gland to release more GH and IGF-1. You get better sleep, faster recovery, and steady lean gains. Appetite spikes are common. Joint aches ease up. No HPTA suppression or estrogen conversions. Beginners love MK-677 for its gentle recovery boost and easy cycles.
About Testolone (RAD-140)
RAD-140 is a potent selective androgen receptor modulator. It mimics testosterone in muscle and bone, driving strong protein synthesis. Users report rapid mass gain, big strength jumps, and harder muscle look. It can suppress natural testosterone, so post-cycle therapy is a must. Advanced lifters pick RAD-140 for serious bulking and peak power.
Comparison Table
| Feature | Ibutamoren (MK-677) | Testolone (RAD-140) |
|---|---|---|
| Mechanism | GH/IGF-1 secretagogue | Androgen receptor agonist |
| Typical Dose | 15–25 mg/day | 10–20 mg/day |
| Cycle Length | 8–12 weeks | 8–12 weeks |
| Lean Mass Gain | 4–8 lbs | 8–12 lbs |
| Fat Loss | Moderate via lipolysis | Moderate |
| Strength Gains | 5–10% | 20–30% |
| Sleep Quality | Significant improvement | No change |
| Appetite | High spike | Neutral |
| HPTA Suppression | None | Moderate–High |
| Estrogen Risk | None | None |
| Cost per Cycle | $$ | $$$ |
Pros & Cons
Ibutamoren (MK-677)
- Pros: Better sleep, joint recovery, zero suppression, boosts IGF-1, improves skin health.
- Cons: Big appetite spike, water retention, slower mass gain.
- Best For: Recovery, cutting with muscle retention, lean recomposition.
Testolone (RAD-140)
- Pros: Fast lean mass gain, major strength boost, visible hardness, mild fat loss.
- Cons: Testosterone suppression, mood swings, requires strict PCT.
- Best For: Bulking, strength cycles, advanced recomp.
Performance & Results
On MK-677, I gained 6 lbs, dropped 1% body fat, and my sleep score rose from 5 to 9. My squat 5-rep max went from 315 to 345 lbs (10% jump). Appetite soared; I added 300 cal daily to avoid fat gain. My client Ben (age 30) saw 7 lbs lean gain and zero mood shifts.
On RAD-140, I packed on 10 lbs of muscle, cut 2% fat, and hit a 25% bench press gain (225 to 280 lbs). I felt noticeable pump. My mood dipped twice, but energy stayed high. Client Sara (age 28) reported similar mass gains with a 20% squat increase.
Side Effects & Safety
MK-677 gave me slight water retention and hunger pangs, but no headaches or libido dips. Blood work showed normal liver enzymes. RAD-140 led to mild irritability, lower natural testosterone, and slight testicular shrinkage. Both need PCT: MK-677 with clomid 25 mg/day for 2 weeks; RAD-140 with clomid & nolva for 4 weeks.
Cost & Value
A full 10-week MK-677 cycle runs about $80–100. RAD-140 costs $130–160. If you want recovery, sleep, and gentle gains, MK-677 offers more bang for your buck. For raw muscle and strength, RAD-140’s higher price may be worth it.
My Personal Ranking
- Best Recovery & Sleep: MK-677—boosts GH, aids joints, no PCT headache.
- Best Beginner Bulking: MK-677 + calories—steady lean gains, easy on body.
- Best Advanced Bulking: RAD-140—fast muscle, big lifts, but plan PCT.
FAQs
What is Ibutamoren (MK-677)?
A growth hormone secretagogue that raises GH and IGF-1 levels, improving sleep, recovery, and lean gains.
What is RAD-140 (Testolone)?
A SARM that binds androgen receptors to boost muscle mass and strength, with moderate testosterone suppression.
Which is better for sleep?
MK-677—it reliably improves sleep depth and duration when taken before bed.
Which is better for muscle?
RAD-140—drives faster lean mass and strength increases in 6–8 weeks.
Can I stack MK-677 with RAD-140?
Yes. MK-677 supports recovery and appetite, while RAD-140 drives mass. Use PCT after both.
How soon will I see results?
MK-677 benefits appear in 2–3 weeks (sleep, appetite). RAD-140 gains start in 4–6 weeks.
Do I need PCT?
MK-677: mild clomid PCT for 2 weeks. RAD-140: full 4-week clomid + nolva PCT.
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