Is Argireline FDA approved?

Argireline is not evaluated or approved by the FDA. It is discussed for research and educational purposes only, not as medical guidance.

Is Leuphasyl FDA approved?

Leuphasyl is not evaluated or approved by the FDA. It is discussed for research and educational purposes only, not as medical guidance.

How is Argireline administered in research settings?

In research settings, Argireline is typically administered via the topical route. PeptideBase does not provide dosing or administration instructions.

How is Leuphasyl administered in research settings?

In research settings, Leuphasyl is typically administered via the topical route. PeptideBase does not provide dosing or administration instructions.

Home›Research›Compare›Argireline vs Leuphasyl

Peptide Comparison

Argireline vs Leuphasyl

Q: What is the difference between Argireline and Leuphasyl?

Argireline: Inhibits SNARE complex formation in facial muscles; reduces acetylcholine release locally; relaxes expression lines without systemic effects Leuphasyl: Tetrapeptide that mimics enkephalin to modulate facial muscle contraction; competes with enkephalin for opioid receptor sites in neuromuscular junctions; reduces repetitive muscle micro-contractions

Both are Skin & Cosmetic peptides.

Argireline

Acetyl Hexapeptide-3

Skin & JointNot EvaluatedResearch Only

Half-life: N/A (topical)

18 providers listed

Full Argireline profile →

Leuphasyl

Acetyl Tetrapeptide-2

Skin & JointNot EvaluatedResearch Only

Half-life: N/A (topical)

No providers listed yet

Full Leuphasyl profile →

Bottom line

Argireline carries stronger published evidence (RCT, 3 key studies) than Leuphasyl (Cohort study, 1); both are research compounds.

Quick Verdict

Argireline

Evidence

Clinical

Leuphasyl

Evidence

Observational

Which One Should You Choose?

Your goal	Better option
Stronger clinical evidence	Argireline
More provider options (18 vs 0)	Argireline

Research summary only — not medical advice. Consult a qualified provider before making any decisions.

Side-by-Side Comparison

Argireline

Leuphasyl

Mechanism Family

Skin & Cosmetic

Half-life

N/A (topical)

FDA Status

not evaluated

Admin Routes

topical

Availability

Research Only

Providers

18 listed

None listed

Avail. Notes

Cosmetic peptide (acetyl hexapeptide-3). Sold as cosmetic ingredient by Lipotec/Sederma. Not regulated as a drug by FDA. No NDA or IND. Cosmetic anti-wrinkle ingredient only.

Cosmetic peptide (pentapeptide-18), enkephalin analog. Sold as cosmetic anti-wrinkle ingredient. Not regulated as a drug by FDA. No NDA or IND. Cosmetic use only.

Research Evidence

Argireline

ClinicalRCT · 3 key studies · most recent 2026

Leuphasyl

ObservationalCohort study · 1 key study · most recent 2026

Research Citations

Argireline

RCT2013 · American Journal of Clinical Dermatology

The anti-wrinkle efficacy of argireline, a synthetic hexapeptide, in Chinese subjects: a randomized, placebo-…

Cohort2026 · Biomater Adv

DES-mediated self-assembled polypeptides: Synergistic neuromuscular signaling inhibition for anti-aging.

RCT2017 · Journal of Cosmetic Dermatology

The efficacy study of the combination of tripeptide-10-citrulline and acetyl hexapeptide-3: a prospective, ra…

Leuphasyl

Cohort2026 · Chem Biodivers

Integrative In Silico and In Vitro Evaluation of Vialox and Leuphasyl Pentapeptides for Antiaging Application…

About Argireline

Inhibits SNARE complex formation in facial muscles; reduces acetylcholine release locally; relaxes expression lines without systemic effects

Research Areas

SNARE complex (SNAP-25) competitive inhibition reducing expression line depthwrinkle reduction documented in controlled human trialstopical cosmetic application — not a systemic peptidesoftening of dynamic lines over 4–8 weeks at 5–10% concentration

About Leuphasyl

Tetrapeptide that mimics enkephalin to modulate facial muscle contraction; competes with enkephalin for opioid receptor sites in neuromuscular junctions; reduces repetitive muscle micro-contractions

Research Areas

expression line reductionfacial muscle relaxationenkephalin pathway modulation

Safety Profile

Information below reflects published research data only — not medical advice. Consult a qualified provider before use.

Argireline

No established clinical contraindications. This is an investigational compound with limited human data and has not been evaluated by the FDA for safety in this context. Consult a qualified clinician.

Leuphasyl

No established clinical contraindications. This is an investigational compound with limited human data and has not been evaluated by the FDA for safety in this context. Consult a qualified clinician.

Find Providers

Where to source these peptides

Providers offering

Argireline

18 listed

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Providers offering

Leuphasyl

Browse directory →

PeptideBase lists providers for educational research purposes only. Always consult a qualified healthcare professional before obtaining or using any peptide.

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Educational research tools — not medical advice.