Ingredient review
Silkworm Polypeptide-69
INCI: SILKWORM RH-POLYPEPTIDE-69
A biotech peptide from silkworms that may support skin firmness and hydration, but research is still early.
In plain English
This is a lab-made peptide originally inspired by proteins found in silkworm silk. In skincare, it's used to help skin feel firmer and more hydrated. Think of it as a tiny protein fragment that signals skin cells to behave more youthfully. Because it's made in a lab, it's consistent and doesn't involve harming silkworms.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is still emerging, so marketing claims deserve extra caution.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- biotech
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Silkworm Polypeptide-69 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 Silkworm Polypeptide-69.
- 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
A recombinant polypeptide (a chain of amino acids) produced through biotechnology, based on a protein sequence from the silkworm (Bombyx mori). It is a specific variant labeled 'RH-POLYPEPTIDE-69'.
How it works
Peptides like this one are thought to act as signaling molecules. When applied to skin, they may mimic natural peptides that tell skin cells to produce more collagen and elastin, which help keep skin firm and smooth. They also attract moisture to the skin's surface, acting as humectants.
Pros
Biotech-sourced
Made in a lab, so it's consistent, sustainable, and doesn't involve silkworm farming.
Multi-functional
Offers both anti-aging signaling and humectant hydration in one ingredient.
Cons and cautions
Limited evidence
Most research is on general peptides, not this specific silkworm variant. Human studies are scarce.
Potentially expensive
Biotech peptides can be costly, which may reflect in the product price.
Best for
- People looking for anti-aging support in their routine
- Those with dry or dehydrated skin seeking extra hydration
Use caution if
- Anyone with a known allergy to silkworm-derived ingredients (though rare)
Usage tips
Safety summary
Safety data is limited due to the novelty of this specific peptide, but related peptides have a good safety profile. Irritation and allergy risks appear low.
Research notes
Evidence is emerging. General peptide research supports anti-aging benefits, but specific studies on Silkworm RH-Polypeptide-69 are minimal. More human trials are needed.
Common label clues
- Typical concentration
- 0.1% to 1%
- Regulatory status
- Generally considered safe for cosmetic use in the EU and US, but not specifically approved as a drug ingredient.
- Common uses
- Anti-aging serums, Firming creams, Moisturizers
- Environmental note
- Biotech production avoids the resource-intensive process of silkworm farming, making it a more sustainable option.
Good to know
- This ingredient is not the same as silk powder or silk amino acids—it's a specific recombinant peptide.
- The 'RH' in the name likely stands for 'recombinant human-like', indicating it's designed to be compatible with human skin.
Common questions
What is Silkworm Polypeptide-69 in beauty products?
This is a lab-made peptide originally inspired by proteins found in silkworm silk. In skincare, it's used to help skin feel firmer and more hydrated. Think of it as a tiny protein fragment that signals skin cells to behave more youthfully. Because it's made in a lab, it's consistent and doesn't involve harming silkworms.
What does Silkworm Polypeptide-69 do in a beauty product?
Peptides like this one are thought to act as signaling molecules. When applied to skin, they may mimic natural peptides that tell skin cells to produce more collagen and elastin, which help keep skin firm and smooth. They also attract moisture to the skin's surface, acting as humectants.
Is Silkworm Polypeptide-69 safe for most people?
Safety data is limited due to the novelty of this specific peptide, but related peptides have a good safety profile. Irritation and allergy risks appear low.
Who should be careful with Silkworm Polypeptide-69?
Anyone with a known allergy to silkworm-derived ingredients (though rare)
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.