Ingredient review
Aminolevulinoyl SH-Pentapeptide-19
INCI: Aminolevulinoyl SH-Pentapeptide-19
A synthetic peptide that may help improve skin firmness and reduce fine lines, but research is still early.
In plain English
This is a lab-made peptide, which is a small chain of amino acids (the building blocks of proteins). Peptides like this one are added to skincare products to signal skin cells to behave more youthfully—for example, to produce more collagen or elastin, which help keep skin plump and firm. Think of it as a tiny messenger that tells your skin to act younger.
Quick decision guide
Useful, but context matters
Aminolevulinoyl SH-Pentapeptide-19 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 Aminolevulinoyl SH-Pentapeptide-19.
- 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
emergingThe ingredient may be promising, but claims should be treated more cautiously.
What it is
Aminolevulinoyl SH-Pentapeptide-19 is a synthetic peptide engineered in a laboratory. It combines a modified amino acid (aminolevulinoyl) with a specific pentapeptide sequence (five amino acids linked together). This structure is designed to be stable and to interact with skin cells in a targeted way.
How it works
When applied topically, the peptide is thought to penetrate the outer layer of skin and bind to receptors on fibroblasts (the cells that produce collagen and elastin). This binding may trigger a signaling cascade that encourages increased production of these structural proteins, leading to firmer, smoother skin over time. The aminolevulinoyl modification may enhance stability or delivery.
Pros
Targeted anti-aging signal
This peptide is designed to specifically encourage collagen and elastin production, which can help improve skin firmness and reduce fine lines over time.
Low irritation profile
As a synthetic peptide, it is generally non-irritating and suitable for sensitive skin types, unlike some stronger active ingredients like retinoids or acids.
Cons and cautions
Limited research
There are very few published studies on this exact peptide, so its effectiveness is less established compared to more widely studied peptides like Matrixyl.
Subtle results
Peptides typically produce gradual, subtle improvements. Users looking for dramatic anti-aging effects may be disappointed and might need to combine with other actives.
Best for
- Individuals looking for anti-aging support with minimal irritation
- Those with sensitive skin who want a gentle firming ingredient
Use caution if
- People with known allergies to peptides (rare)
- Those expecting dramatic, instant results
Usage tips
Safety summary
Aminolevulinoyl SH-Pentapeptide-19 is considered safe for topical cosmetic use at typical concentrations. There are no known significant safety concerns, though individual sensitivity is always possible. As with any new ingredient, a patch test is recommended.
Research notes
Research on this specific peptide is limited. Most evidence comes from manufacturer studies and general knowledge about peptide signaling in skin. More independent, peer-reviewed studies are needed to confirm its efficacy and compare it to other anti-aging peptides.
Common label clues
- Typical concentration
- 0.001% to 0.1% in leave-on products
- Regulatory status
- Approved for cosmetic use in the US and EU as a skin conditioning agent. Not classified as a drug.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- Synthetic peptides are produced in controlled lab settings, which reduces environmental impact compared to some natural extracts, but manufacturing still requires energy and chemical inputs.
Good to know
- Peptides are often listed near the end of ingredient lists because they are effective at very low concentrations.
- This peptide may be combined with other anti-aging ingredients like niacinamide or vitamin C for complementary benefits.
Common questions
What is Aminolevulinoyl SH-Pentapeptide-19 in beauty products?
This is a lab-made peptide, which is a small chain of amino acids (the building blocks of proteins). Peptides like this one are added to skincare products to signal skin cells to behave more youthfully—for example, to produce more collagen or elastin, which help keep skin plump and firm. Think of it as a tiny messenger that tells your skin to act younger.
What does Aminolevulinoyl SH-Pentapeptide-19 do in a beauty product?
When applied topically, the peptide is thought to penetrate the outer layer of skin and bind to receptors on fibroblasts (the cells that produce collagen and elastin). This binding may trigger a signaling cascade that encourages increased production of these structural proteins, leading to firmer, smoother skin over time. The aminolevulinoyl modification may enhance stability or delivery.
Is Aminolevulinoyl SH-Pentapeptide-19 safe for most people?
Aminolevulinoyl SH-Pentapeptide-19 is considered safe for topical cosmetic use at typical concentrations. There are no known significant safety concerns, though individual sensitivity is always possible. As with any new ingredient, a patch test is recommended.
Who should be careful with Aminolevulinoyl SH-Pentapeptide-19?
People with known allergies 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.