Comparison · Sexual & Skin
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Compare up to 4 peptides from the Sexual & Skin category. Tick any two or more — mechanism, protocols, side effects, stacking partners, and best $/mg update instantly.
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- Those looking to support fuller, healthier hair growth.
- People interested in skin-firming cosmetic products.
- Beauty enthusiasts experimenting with advanced skincare ingredients.
- Men who haven't had success with traditional ED medications.
- Those recovering from prostate surgery and looking to maintain function.
- Parents of newborns with specific heart conditions, in a medical setting.
- Anyone noticing the first signs of aging and wanting to smooth out fine lines
- People with sensitive skin looking for a gentle anti-aging option
- Those who prefer non-invasive skincare solutions
- Skincare enthusiasts who enjoy using serums and creams
- Sun worshippers looking for a tan without the UV exposure
- People curious about experimental libido boosters
- Those interested in cutting-edge, albeit unapproved, research chemicals
- Individuals with sensitive skin prone to irritation.
- Those expecting instant, dramatic results.
- Anyone looking for FDA-approved medical treatments.
- People looking for an over-the-counter solution to ED.
- Anyone uncomfortable with the idea of injections or suppositories.
- Those expecting a quick fix without medical supervision.
- Someone looking for instant results without consistent use
- Individuals expecting medical-grade outcomes from cosmetic products
- People allergic to common cream or serum ingredients like preservatives
- Anyone cautious about unregulated substances
- People with a history of skin issues or melanoma
- Those uncomfortable with unexpected sexual side effects
- Hair follicle stimulation
- VEGF and angiogenic signaling
- Skin-firming and wound-aesthetic cosmetic use
- Erectile dysfunction (FDA-approved)
- Penile rehabilitation post-prostatectomy
- Neonatal ductal patency (FDA-approved)
- Reduction in wrinkle depth and skin roughness
- Collagen and ECM stimulation
- Tolerability advantage over retinoids
- UV-independent melanogenesis (research)
- Pro-erectile / libido signal (historical, abandoned program)
- Appetite suppression in animal models
AHK-Cu is a synthetic copper-binding tripeptide (Alanine-Histidine-Lysine) complexed to a copper(II) ion. It is structurally related to GHK-Cu but substitutes alanine for glycine at the N-terminus, y…
Alprostadil is synthetic prostaglandin E1. It activates prostaglandin EP receptors on vascular smooth muscle, raising intracellular cAMP and reducing cytosolic calcium. This produces vasodilation and…
Matrixyl is a lipopeptide formed by conjugating a palmitic acid chain to the pentapeptide KTTKS, a fragment of the procollagen-I C-terminal propeptide. The palmitoyl moiety increases lipid-bilayer pe…
Melanotan 2 is a synthetic cyclic analog of alpha-MSH that acts as a non-selective agonist across MC1R, MC3R, MC4R, and MC5R melanocortin receptors. MC1R activity drives eumelanin synthesis (tanning)…
- Scalp or skin irritation, mild erythema
- Rare contact dermatitis
- Transient copper-related taste / scalp tingling
- Penile pain (most common, 30-40% of intracavernosal users)
- Prolonged erection / priapism (requires urgent medical evaluation if >4 hours)
- Penile fibrosis or Peyronie-like plaques with chronic use
- Mild transient erythema in sensitive skin
- Rare contact dermatitis to formulation excipients (preservatives, fragrance) rather than peptide itself
- No systemic absorption of concern at topical cosmetic doses
- Spontaneous penile erections and priapism
- Severe nausea, especially on early doses
- Darkening of existing nevi and appearance of new pigmented lesions
- Wilson's disease and other disorders of copper metabolism
- Known copper or peptide hypersensitivity
- Pregnancy and lactation (insufficient data for injected research use)
- Conditions predisposing to priapism (sickle cell disease/trait, multiple myeloma, leukemia)
- Penile anatomic deformation or fibrotic plaques
- Penile implants
- Known hypersensitivity to palmitoyl-peptide conjugates or formulation excipients
- Broken/compromised skin barrier (wait until healed before reintroducing actives)
- Pregnancy and lactation (limited data; conservative avoidance of any active cosmetic ingredient without clinician sign-off)
- Any personal or family history of melanoma
- Atypical nevus syndrome or numerous dysplastic moles
- Fair skin with high baseline melanoma risk
Think of it as
Think of it as a personal trainer for your hair follicles.Best for
- Those looking to support fuller, healthier hair growth.
- People interested in skin-firming cosmetic products.
- Beauty enthusiasts experimenting with advanced skincare ingredients.
Probably not for you if…
- Individuals with sensitive skin prone to irritation.
- Those expecting instant, dramatic results.
- Anyone looking for FDA-approved medical treatments.
Key benefits
- Hair follicle stimulation
- VEGF and angiogenic signaling
- Skin-firming and wound-aesthetic cosmetic use
Mechanism of action
AHK-Cu is a synthetic copper-binding tripeptide (Alanine-Histidine-Lysine) complexed to a copper(II) ion. It is structurally related to GHK-Cu but substitutes alanine for glycine at the N-terminus, y…
Typical protocol
Reported side effects
- Scalp or skin irritation, mild erythema
- Rare contact dermatitis
- Transient copper-related taste / scalp tingling
Contraindications
- Wilson's disease and other disorders of copper metabolism
- Known copper or peptide hypersensitivity
- Pregnancy and lactation (insufficient data for injected research use)
Best $/mg
Think of it as
Think of it as a jump-starter for blood flow.Best for
- Men who haven't had success with traditional ED medications.
- Those recovering from prostate surgery and looking to maintain function.
- Parents of newborns with specific heart conditions, in a medical setting.
Probably not for you if…
- People looking for an over-the-counter solution to ED.
- Anyone uncomfortable with the idea of injections or suppositories.
- Those expecting a quick fix without medical supervision.
Key benefits
- Erectile dysfunction (FDA-approved)
- Penile rehabilitation post-prostatectomy
- Neonatal ductal patency (FDA-approved)
Mechanism of action
Alprostadil is synthetic prostaglandin E1. It activates prostaglandin EP receptors on vascular smooth muscle, raising intracellular cAMP and reducing cytosolic calcium. This produces vasodilation and…
Typical protocol
Reported side effects
- Penile pain (most common, 30-40% of intracavernosal users)
- Prolonged erection / priapism (requires urgent medical evaluation if >4 hours)
- Penile fibrosis or Peyronie-like plaques with chronic use
Contraindications
- Conditions predisposing to priapism (sickle cell disease/trait, multiple myeloma, leukemia)
- Penile anatomic deformation or fibrotic plaques
- Penile implants
Stacks well with
Best $/mg
Think of it as
Think of it as a skin-smoothing whisperer.Best for
- Anyone noticing the first signs of aging and wanting to smooth out fine lines
- People with sensitive skin looking for a gentle anti-aging option
- Those who prefer non-invasive skincare solutions
- Skincare enthusiasts who enjoy using serums and creams
Probably not for you if…
- Someone looking for instant results without consistent use
- Individuals expecting medical-grade outcomes from cosmetic products
- People allergic to common cream or serum ingredients like preservatives
Key benefits
- Reduction in wrinkle depth and skin roughness
- Collagen and ECM stimulation
- Tolerability advantage over retinoids
Mechanism of action
Matrixyl is a lipopeptide formed by conjugating a palmitic acid chain to the pentapeptide KTTKS, a fragment of the procollagen-I C-terminal propeptide. The palmitoyl moiety increases lipid-bilayer pe…
Typical protocol
Reported side effects
- Mild transient erythema in sensitive skin
- Rare contact dermatitis to formulation excipients (preservatives, fragrance) rather than peptide itself
- No systemic absorption of concern at topical cosmetic doses
Contraindications
- Known hypersensitivity to palmitoyl-peptide conjugates or formulation excipients
- Broken/compromised skin barrier (wait until healed before reintroducing actives)
- Pregnancy and lactation (limited data; conservative avoidance of any active cosmetic ingredient without clinician sign-off)
Stacks well with
Best $/mg
Think of it as
Think of it as a shortcut to a summer tan without the sun.Best for
- Sun worshippers looking for a tan without the UV exposure
- People curious about experimental libido boosters
- Those interested in cutting-edge, albeit unapproved, research chemicals
Probably not for you if…
- Anyone cautious about unregulated substances
- People with a history of skin issues or melanoma
- Those uncomfortable with unexpected sexual side effects
Key benefits
- UV-independent melanogenesis (research)
- Pro-erectile / libido signal (historical, abandoned program)
- Appetite suppression in animal models
Mechanism of action
Melanotan 2 is a synthetic cyclic analog of alpha-MSH that acts as a non-selective agonist across MC1R, MC3R, MC4R, and MC5R melanocortin receptors. MC1R activity drives eumelanin synthesis (tanning)…
Typical protocol
Reported side effects
- Spontaneous penile erections and priapism
- Severe nausea, especially on early doses
- Darkening of existing nevi and appearance of new pigmented lesions
Contraindications
- Any personal or family history of melanoma
- Atypical nevus syndrome or numerous dysplastic moles
- Fair skin with high baseline melanoma risk
Stacks well with
Best $/mg
For research purposes only. Not medical advice.