Source comparison
MK-677 for Women 45-55 Perimenopause: Protocol Comparison
Standard Daily (25mg) 25mg once daily, 60–90 minutes before bed Sleep improvement: 1–2 weeks. Lean mass/fat changes: 12–16 weeks Maximal IGF-1 elevation, consistent anabolic signaling Water retention peaks weeks 2–6, then stabilizes Split Dose (12.5mg BID) 12.
This comparison does not assign a generated winner or score.
- Standard Daily (25mg)
- 25mg once daily, 60–90 minutes before bed
- Sleep improvement: 1–2 weeks. Lean mass/fat changes: 12–16 weeks
- Maximal IGF-1 elevation, consistent anabolic signaling
- Water retention peaks weeks 2–6, then stabilizes
- Split Dose (12.5mg BID)
- 12.5mg morning + 12.5mg pre-bed
- Reduced appetite surge, steadier GH elevation
- Requires consistent timing; slightly lower peak IGF-1
- Cycling (5 days on, 2 off)
- 25mg daily for 5 days, 2-day break each week
- Sleep improvement: 1–2 weeks. Lean mass/fat changes: 14–18 weeks (slower)
- May reduce water retention, lower cost
- Less consistent IGF-1 levels; benefits accrue more slowly
- Pre-Bed Only (20mg)
- 20mg 60 minutes before sleep
- Sleep improvement: 1–2 weeks. Lean mass/fat changes: 16+ weeks
- Optimized for sleep quality over body composition
- Lower total IGF-1 exposure; lean mass gains less pronounced
- Professional Assessment
- Daily dosing at 25mg produces the most reliable increases in IGF-1 and the fastest improvements in body composition and bone turnover markers. Split dosing reduces appetite side effects but requires stricter adherence. Cycling protocols are popular among users concerned about long-term receptor sensitivity, though clinical evidence for desensitization at 25mg daily is minimal. Pre-bed-only protocols prioritize sleep enhancement and are appropriate for women whose primary goal is improved rest rather than lean mass preservation.