Ingredient review
Lauroyl SH-Tetrapeptide-1
INCI: Lauroyl SH-Tetrapeptide-1
A synthetic peptide that may help improve skin firmness and reduce fine lines, but research is still emerging.
In plain English
This is a lab-made peptide, which is a small chain of amino acids (the building blocks of proteins). It has a fatty acid (lauroyl) attached to help it absorb into skin. Peptides like this are used in anti-aging products because they can signal skin cells to produce more collagen and elastin, the proteins that keep skin plump and firm. Think of it as a tiny messenger that tells your skin to act younger.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Lauroyl SH-Tetrapeptide-1 is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Lauroyl SH-Tetrapeptide-1.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic peptide consisting of a specific sequence of four amino acids (SH-Tetrapeptide-1) modified with a lauroyl (fatty acid) group to improve stability and skin penetration.
How it works
When applied topically, the lauroyl group helps the peptide penetrate the outer layer of skin. Once inside, the peptide sequence is thought to mimic natural collagen fragments, signaling skin cells to boost collagen and elastin production, which can lead to firmer, smoother skin over time.
Pros
Gentle anti-aging support
This peptide is unlikely to cause irritation, making it a good option for sensitive skin types who want to address fine lines without redness or peeling.
Stable and penetrative
The lauroyl modification helps the peptide stay stable in formulas and absorb into skin more effectively than some unmodified peptides.
Cons and cautions
Modest evidence base
While lab studies are promising, there are fewer large-scale human trials confirming its effectiveness compared to well-established ingredients like retinoids or vitamin C.
Results take time
Peptides work slowly by signaling skin cells, so you may need to use a product consistently for several weeks to notice any visible improvement.
Best for
- People looking for a gentle anti-aging ingredient
- Those with sensitive skin who cannot tolerate stronger actives like retinoids
Use caution if
- Anyone with a known allergy to peptides (rare)
- Those expecting dramatic, instant results
Usage tips
Safety summary
Lauroyl SH-Tetrapeptide-1 is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, and no significant safety concerns have been reported in available research.
Research notes
Evidence is primarily from in vitro (lab) studies and small human trials suggesting collagen-stimulating effects. More robust clinical studies are needed to confirm long-term anti-aging benefits.
Common label clues
- Typical concentration
- 0.001% to 0.1%
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, and other major markets. Not classified as a drug.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- Synthetic peptides are produced in labs, which reduces the need for animal-derived ingredients and can have a lower environmental footprint than some natural extracts.
Good to know
- Peptides are often combined with other anti-aging ingredients like niacinamide or hyaluronic acid for added benefits.
- The 'SH' in the name refers to a specific amino acid sequence (Serine-Histidine) that is part of the peptide chain.
Common questions
What is Lauroyl SH-Tetrapeptide-1 in beauty products?
This is a lab-made peptide, which is a small chain of amino acids (the building blocks of proteins). It has a fatty acid (lauroyl) attached to help it absorb into skin. Peptides like this are used in anti-aging products because they can signal skin cells to produce more collagen and elastin, the proteins that keep skin plump and firm. Think of it as a tiny messenger that tells your skin to act younger.
What does Lauroyl SH-Tetrapeptide-1 do in a beauty product?
When applied topically, the lauroyl group helps the peptide penetrate the outer layer of skin. Once inside, the peptide sequence is thought to mimic natural collagen fragments, signaling skin cells to boost collagen and elastin production, which can lead to firmer, smoother skin over time.
Is Lauroyl SH-Tetrapeptide-1 safe for most people?
Lauroyl SH-Tetrapeptide-1 is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, and no significant safety concerns have been reported in available research.
Who should be careful with Lauroyl SH-Tetrapeptide-1?
Anyone with a known allergy to peptides (rare) Those expecting dramatic, instant results
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.