Liraglutide vs GHK
Side-by-side comparison of key properties, dosing, and research.
GLP-1 / Weight Loss AgonistsFat Loss & Metabolic
LiraglutideSkin & CosmeticAnti-Aging & Longevity
GHK- Summary
- Liraglutide is a long-acting GLP-1 receptor agonist approved for type 2 diabetes (Victoza) and chronic weight management (Saxenda). It reduces appetite, slows gastric emptying, improves insulin secretion, and promotes weight loss of 5–10% in clinical trials.
- GHK is the natural tripeptide (Gly-His-Lys) released from human albumin that activates tissue remodeling, collagen synthesis, and anti-aging gene expression. The copper-free form is the biological signaling molecule; it chelates copper in tissue to form GHK-Cu but also has independent biological activity.
- Half-Life
- ~13 hours (once-daily dosing)
- Extremely short as free peptide; tissue binding extends local effects
- Admin Route
- SubQ
- SubQ, Topical, Oral
- Research
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- Typical Dose
- Start 0.6 mg, titrate to 3 mg
- 100–500 mcg
- Frequency
- Once daily
- Daily or 5x per week
- Key Benefits
- Promotes weight loss (5–10% average)
- Reduces appetite and caloric intake
- Improves blood glucose control (HbA1c reduction)
- Reduces cardiovascular events in T2DM (LEADER trial)
- Slows gastric emptying
- FDA-approved for T2DM and chronic weight management
- Cardioprotective effects shown in clinical trials
- May improve fatty liver (NAFLD/NASH)
- Stimulates collagen and extracellular matrix synthesis
- Activates tissue repair gene expression programs
- Anti-aging: reverses 57% of age-related gene changes
- Antioxidant and anti-inflammatory
- Wound healing and skin barrier repair
- Improves skin laxity, texture, and radiance
- Neuroprotective (stimulates NGF, BDNF)
- Anti-fibrotic in liver and lung models
- Side Effects
- Nausea (very common, especially initially)
- Vomiting
- Diarrhea or constipation
- Decreased appetite
- +5 more
- Excellent safety profile (naturally occurring peptide)
- Rare: mild injection site reaction (SC)
- No significant adverse effects identified in research
- Stacks With
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