Ingredient review

Anacardoyl SH-Pentapeptide-39 Tripeptide-1

INCI: Anacardoyl SH-Pentapeptide-39 Tripeptide-1

A synthetic peptide blend that may help support collagen and improve skin firmness, but human data is still limited.

beautyskincareanti-aging

In plain English

This ingredient is a lab-made peptide complex. Peptides are short chains of amino acids that act as building blocks for proteins like collagen. In skincare, they are used to signal skin cells to produce more collagen, which can help reduce fine lines and improve firmness. The 'anacardoyl' part refers to a fatty acid derived from cashew nut shell oil, which may help the peptides absorb better into the skin.

Quick decision guide

Useful, but context matters

Anacardoyl SH-Pentapeptide-39 Tripeptide-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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Anacardoyl SH-Pentapeptide-39 Tripeptide-1.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

emerging

The ingredient may be promising, but claims should be treated more cautiously.

What it is

A synthetic peptide complex combining two peptides (SH-Pentapeptide-39 and Tripeptide-1) with an anacardoyl fatty acid group to enhance delivery into the skin.

How it works

The peptide portion is thought to mimic natural collagen fragments, signaling skin cells to boost collagen production. The anacardoyl fatty acid helps the peptide penetrate the outer skin barrier more effectively, potentially increasing its efficacy.

Pros

Low irritation potential

Peptides are generally gentle on the skin, making this ingredient suitable for sensitive skin types.

Targeted anti-aging support

Designed to mimic collagen signals, potentially helping to improve skin firmness and reduce fine lines over time.

Cons and cautions

Limited human evidence

Most data comes from lab or animal studies; robust human clinical trials are scarce, so real-world results may vary.

Potential allergen concern

The anacardoyl group is derived from cashew nut oil, which could pose a risk for those with tree nut allergies.

Best for

  • Individuals looking for anti-aging support with a peptide-based ingredient
  • Those with sensitive skin seeking a low-irritation option

Use caution if

  • People with known allergies to cashew nut or related tree nuts (due to the anacardoyl source)

Usage tips

Apply after cleansing and before heavier creams to allow better absorption.
Use consistently for at least 8-12 weeks to see potential improvements in skin firmness.
Pair with a moisturizer containing ceramides or hyaluronic acid to support the skin barrier.

Safety summary

Generally recognized as safe for topical cosmetic use at typical concentrations. The main caution is for individuals with tree nut allergies due to the cashew-derived anacardoyl group. Always patch test new products.

Research notes

Evidence is primarily from in vitro and limited in vivo studies suggesting collagen-stimulating effects. More human clinical trials are needed to confirm efficacy and optimal concentrations.

Common label clues

Typical concentration
0.1% to 1%
Regulatory status
Approved for cosmetic use in the EU and US as a skin conditioning agent. Not classified as a drug ingredient.
Common uses
Anti-aging serums, Firming creams, Eye treatments
Environmental note
Synthetic peptides are produced in labs, reducing the need for animal-derived ingredients. The anacardoyl source is a byproduct of cashew processing, which may be considered sustainable.

Good to know

  • Peptides are often listed near the end of ingredient lists because they are effective at low concentrations.
  • The 'SH' in the name stands for 'sodium hydrosulfite' used in synthesis, not a separate active.

Common questions

What is Anacardoyl SH-Pentapeptide-39 Tripeptide-1 in beauty products?

This ingredient is a lab-made peptide complex. Peptides are short chains of amino acids that act as building blocks for proteins like collagen. In skincare, they are used to signal skin cells to produce more collagen, which can help reduce fine lines and improve firmness. The 'anacardoyl' part refers to a fatty acid derived from cashew nut shell oil, which may help the peptides absorb better into the skin.

What does Anacardoyl SH-Pentapeptide-39 Tripeptide-1 do in a beauty product?

The peptide portion is thought to mimic natural collagen fragments, signaling skin cells to boost collagen production. The anacardoyl fatty acid helps the peptide penetrate the outer skin barrier more effectively, potentially increasing its efficacy.

Is Anacardoyl SH-Pentapeptide-39 Tripeptide-1 safe for most people?

Generally recognized as safe for topical cosmetic use at typical concentrations. The main caution is for individuals with tree nut allergies due to the cashew-derived anacardoyl group. Always patch test new products.

Who should be careful with Anacardoyl SH-Pentapeptide-39 Tripeptide-1?

People with known allergies to cashew nut or related tree nuts (due to the anacardoyl source)

Research sources

Cosmetic Ingredient Review (CIR) - Safety of PeptidesOpenPubMed - Peptides in CosmeticsOpenINCI Decoder - Peptide OverviewOpen

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.