Matrixyl vs MK-677 (Ibutamoren)
Side-by-side comparison of key properties, dosing, and research.
Skin & Cosmetic
MatrixylGrowth Hormone Peptides
MK-677 (Ibutamoren)- Summary
- Matrixyl is the most widely used collagen-stimulating cosmetic peptide. As a matrikine — a fragment of type I procollagen — it signals skin cells to synthesize new collagen, elastin, and fibronectin, reducing wrinkle depth and improving skin firmness and elasticity.
- MK-677 (Ibutamoren) is an orally active, non-peptide ghrelin receptor agonist that increases growth hormone and IGF-1 levels. Unlike injectable GHRPs, it can be taken orally and has a 24-hour half-life, making it convenient for sustained GH optimization.
- Half-Life
- N/A — topical; sustained signaling effects on fibroblasts persist beyond single application
- 24 hours
- Admin Route
- Topical
- Oral
- Research
- —
- —
- Typical Dose
- 3–8% concentration
- 10–25 mg
- Frequency
- Once or twice daily
- Once daily
- Key Benefits
- Stimulates collagen I, III, and IV synthesis
- Increases fibronectin and glycosaminoglycan production
- Reduces wrinkle depth and length by 27–68% (studies)
- Improves skin firmness and elasticity
- Reduces dark circles and undereye bags
- Synergistic with retinol, vitamin C, and growth factors
- Suitable for all skin types including sensitive
- Well-studied with published clinical data
- Increases lean muscle mass
- Enhances bone density
- Improves sleep quality and REM sleep
- Accelerates recovery from training
- Increases appetite
- May improve skin elasticity and appearance
- Supports fat loss while maintaining muscle
- Oral administration — no injections required
- 24-hour half-life allows once-daily dosing
- Side Effects
- Exceptional safety profile
- Non-irritating, suitable for sensitive skin
- No known adverse effects at cosmetic concentrations
- Increased appetite (significant in some users)
- Water retention and puffiness
- Elevated blood glucose / insulin resistance (monitor in diabetics)
- Lethargy initially
- +2 more
- Stacks With
- —
- —