Pentapeptide-18 vs Oligopeptide-1
Comprehensive side-by-side comparison of mechanisms, dosing, side effects, and research
Also: Leuphasyl, Tyr-Ala-Gly-Phe-Leu
Pentapeptide-18 is Lipotec's Leuphasyl, a 'Botox-like' cosmetic peptide modeled on enkephalins, the body's own calming neuropeptides. It is mostly sold alongside Argireline, with the claim that the two relax expression lines better together. It is a cosmetic ingredient, and the evidence is small and mostly manufacturer-run.
Also: sh-Oligopeptide-1, rh-Oligopeptide-1
sh-Oligopeptide-1 is the cosmetic ingredient name for recombinant human epidermal growth factor (EGF), a 53-amino-acid protein your skin uses to tell cells to divide and repair. It shows up in 'EGF serums' aimed at wrinkles, texture and post-procedure recovery. It is a cosmetic ingredient in skincare, not an FDA-approved drug for skin aging, and while there are a fair number of small human studies, very few are properly controlled.
Key Comparison Insights
- Both peptides belong to the Skin & Hair category, suggesting similar primary applications.
- Oligopeptide-1 has stronger research evidence (Human Trials) compared to Pentapeptide-18 (Limited Research).
Detailed Comparison
| Attribute | Pentapeptide-18 | Oligopeptide-1 |
|---|---|---|
| Category | Skin & Hair | Skin & Hair |
| FDA Status | Not FDA Approved | Not FDA Approved |
| Clinical Status | Pre I II III IV FDA | Pre I II III IV FDA |
| Mechanism of Action | Pentapeptide-18 is Tyr-Ala-Gly-Phe-Leu, a close copy of Leu-enkephalin (Tyr-Gly-Gly-Phe-Leu) with one amino acid swapped. The theory is that it binds enkephalin receptors on nerve endings, which dampens nerve activity and lowers acetylcholine release at the junction with facial muscles. Argireline works at a different step (the SNARE complex inside the nerve ending), which is why the two get marketed as a combo. The same big caveat as Argireline applies: it is sold on a nerve-to-muscle mechanism, but nobody has shown in living skin that a topical cream delivers enough peptide to the muscle to do this. | EGF binds the EGF receptor on keratinocytes and fibroblasts and switches on growth and repair signaling: cell division, migration, and production of matrix proteins. That is why it has been studied for wound healing, and why cosmetic brands use it to support skin renewal. Two practical problems: EGF is a fairly large protein, so getting it through intact skin is hard (which is why many studies pair it with microneedling or lasers), and it is fragile, so how much stays active in a jar at room temperature is a fair question. The same growth-promoting signal is also the source of the safety debate: EGF receptor signaling drives several cancers, so the concern is not that EGF causes cancer, but whether it could encourage abnormal cells that are already there. |
| Common Dosing | About 2-5% of the commercial solution in a finished product Once or twice daily | Low parts-per-million concentration in a serum Once or twice daily |
| Administration | Topical (serums, creams) | Topical (serums, ampoules, creams); sometimes combined with microneedling in clinic |
| Typical Duration | 28 days to 2 months in studies; ongoing use to maintain any effect | Studies typically ran 4 to 12 weeks |
| Best Time to Take | Morning and/or evening, on clean skin | Evening skincare routine, or right after an in-clinic procedure |
Possible Side Effects May vary by individual |
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| Research Summary | The most quoted numbers come from a Lipotec study: about 11% wrinkle reduction with 5% Leuphasyl alone over 28 days in a small panel, and about 25% with 5% Leuphasyl plus 5% Argireline. The company calls that synergy, but on its own figures the combination roughly equals the two effects added together, so 'synergistic' is a stretch. The one journal paper we found is Dragomirescu and colleagues (2014, Cosmetics, MDPI), which tested 0.5%, 1% and 2% emulsions around the eyebrows and eyes for efficacy and safety. Trade summaries say only the 2% cream gave a significant improvement after two months in about 20 volunteers; we could not read the full paper to confirm the numbers. A 2020 review of cosmetic peptides lists it among the neurotransmitter-inhibitor peptides and notes that much of the support comes from the manufacturer. Bottom line: safe enough as a skincare ingredient and plausible on paper, but expect subtle softening at most, not anything close to an injection. | A 2021 systematic review in the Journal of Cutaneous and Aesthetic Surgery (Miller-Kobisher and colleagues) found 49 articles on rhEGF for skin, including 23 aesthetic studies. Most reported less wrinkling, better hydration and elasticity, and the strongest data were for pigmentation after lasers and melasma. But the authors admit many trials were uncontrolled or not randomized, samples were often 8 to 40 people, and they called for proper controlled trials. Adverse effects were mild and short-lived. The review did not address cancer risk at all, which is a real gap. Several of the better-known growth-factor trials tested multi-factor mixtures, not EGF alone. On safety: there is no human evidence that cosmetic EGF causes skin cancer, and in vitro tests of growth-factor cosmetics on melanoma cells were reassuring, but long-term studies in healthy skin do not exist. Sensible caution: people with a history of skin cancer, many atypical moles, or active psoriasis should talk to a dermatologist before using it. Bottom line: plausible and widely used, modest and mostly low-quality efficacy data, and an unresolved theoretical safety question. |
Frequently Asked Questions: Pentapeptide-18 vs Oligopeptide-1
What is the difference between Pentapeptide-18 and Oligopeptide-1?
Pentapeptide-18 is a skin & hair peptide that pentapeptide-18 is lipotec's leuphasyl, a 'botox-like' cosmetic peptide modeled on enkephalins, the body's own calming neuropeptides. it is mostly sold alongside argireline, with the claim that the two relax expression lines better together. it is a cosmetic ingredient, and the evidence is small and mostly manufacturer-run. Oligopeptide-1 is a skin & hair peptide that sh-oligopeptide-1 is the cosmetic ingredient name for recombinant human epidermal growth factor (egf), a 53-amino-acid protein your skin uses to tell cells to divide and repair. it shows up in 'egf serums' aimed at wrinkles, texture and post-procedure recovery. it is a cosmetic ingredient in skincare, not an fda-approved drug for skin aging, and while there are a fair number of small human studies, very few are properly controlled. The main differences lie in their mechanisms of action and clinical applications.
Which is better, Pentapeptide-18 or Oligopeptide-1?
Neither is universally "better" - the choice depends on your specific goals. Pentapeptide-18 is typically used for skin & hair purposes, while Oligopeptide-1 is used for skin & hair. Always consult with a healthcare provider to determine which may be appropriate for your situation.
Can Pentapeptide-18 and Oligopeptide-1 be used together?
Some peptide protocols combine multiple compounds for synergistic effects. However, using Pentapeptide-18 and Oligopeptide-1 together should only be considered under medical supervision, as both compounds have their own side effect profiles and potential interactions. Research on their combined use may be limited.