Palmitoyl Dipeptide-6 vs Liraglutide
Side-by-side comparison of key properties, dosing, and research.
Skin & CosmeticAnti-Aging & Longevity
Palmitoyl Dipeptide-6GLP-1 / Weight Loss AgonistsFat Loss & Metabolic
Liraglutide- Summary
- Palmitoyl Dipeptide-6 is a synthetic dipeptide (lysine-threonine) with a palmitoyl fatty acid tail, designed to penetrate the skin barrier and stimulate the extracellular matrix components essential for skin firmness. It activates fibronectin and type IV collagen synthesis, improving skin density and firmness particularly in mature or sagging skin.
- 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.
- Half-Life
- Not applicable (topical)
- ~13 hours (once-daily dosing)
- Admin Route
- Topical
- SubQ
- Research
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- Typical Dose
- 0.005–0.05% in formulation
- Start 0.6 mg, titrate to 3 mg
- Frequency
- Once or twice daily
- Once daily
- Key Benefits
- Increases skin firmness and density
- Stimulates fibronectin and collagen IV production
- Strengthens the dermal-epidermal junction
- Reduces skin sagging in mature skin
- Improves skin texture and smoothness
- Supports extracellular matrix integrity
- 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)
- Side Effects
- Generally well-tolerated
- Rare mild skin irritation in sensitive individuals
- No known systemic effects at cosmetic concentrations
- Nausea (very common, especially initially)
- Vomiting
- Diarrhea or constipation
- Decreased appetite
- +5 more
- Stacks With
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