Ingredient review
Oligopeptide-91 SH-Polypeptide-2
INCI: Oligopeptide-91, SH-Polypeptide-2
A synthetic peptide duo that may help firm skin and reduce fine lines, but human studies are limited.
In plain English
Peptides are short chains of amino acids that act like messengers for your skin cells. Oligopeptide-91 and SH-Polypeptide-2 are lab-made versions that tell your skin to produce more collagen and elastin, the proteins that keep skin plump and bouncy. Think of them as tiny signals that encourage 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
Oligopeptide-91 SH-Polypeptide-2 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 Oligopeptide-91 SH-Polypeptide-2.
- 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 combination of two synthetic peptides: Oligopeptide-91 and SH-Polypeptide-2. Peptides are small protein fragments that can penetrate the outer layer of skin to communicate with cells.
How it works
These peptides mimic natural signaling molecules in the skin. They bind to receptors on fibroblasts (the cells that make collagen) and trigger them to ramp up collagen and elastin production. This can help improve skin firmness, elasticity, and reduce the appearance of fine lines over time.
Pros
Targeted collagen support
Directly signals skin cells to produce more collagen, which can help maintain a firmer, more youthful appearance over time.
Low irritation potential
Synthetic peptides are generally non-irritating and suitable for sensitive skin, unlike some stronger active ingredients like retinoids.
Cons and cautions
Subtle, gradual results
Peptides work slowly and improvements in firmness or lines may take weeks to months of consistent use. They are not a quick fix.
Limited human research
While peptide technology is promising, specific clinical studies on this exact blend are scarce. Most evidence comes from related peptides or lab studies.
Best for
- People looking for gentle anti-aging support
- Those with mature or sun-damaged skin wanting improved firmness
Use caution if
- Anyone with a known allergy to synthetic peptides (rare)
- Those expecting instant or dramatic results
Usage tips
Safety summary
Oligopeptide-91 and SH-Polypeptide-2 are considered safe for topical use in cosmetics. Irritation and allergy are rare. As with any new ingredient, a patch test is recommended for those with very sensitive skin.
Research notes
Peptides as a class have moderate evidence supporting their ability to stimulate collagen synthesis in lab and some human studies. However, specific human trials for this exact blend are limited, and results are modest compared to prescription treatments.
Common label clues
- Typical concentration
- 0.001% to 0.1%
- Regulatory status
- Generally recognized as safe for cosmetic use in the US and EU when used at typical concentrations. Not classified as a drug ingredient.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- Synthetic peptides are produced in labs, which reduces the need for animal-derived or plant-harvested ingredients. Their environmental impact is relatively low due to small usage amounts.
Good to know
- Peptides are often paired with antioxidants like vitamin C or niacinamide for complementary anti-aging benefits.
- The 'SH' in SH-Polypeptide-2 may refer to a specific synthetic sequence, but exact details are proprietary.
Common questions
What is Oligopeptide-91 SH-Polypeptide-2 in beauty products?
Peptides are short chains of amino acids that act like messengers for your skin cells. Oligopeptide-91 and SH-Polypeptide-2 are lab-made versions that tell your skin to produce more collagen and elastin, the proteins that keep skin plump and bouncy. Think of them as tiny signals that encourage your skin to act younger.
What does Oligopeptide-91 SH-Polypeptide-2 do in a beauty product?
These peptides mimic natural signaling molecules in the skin. They bind to receptors on fibroblasts (the cells that make collagen) and trigger them to ramp up collagen and elastin production. This can help improve skin firmness, elasticity, and reduce the appearance of fine lines over time.
Is Oligopeptide-91 SH-Polypeptide-2 safe for most people?
Oligopeptide-91 and SH-Polypeptide-2 are considered safe for topical use in cosmetics. Irritation and allergy are rare. As with any new ingredient, a patch test is recommended for those with very sensitive skin.
Who should be careful with Oligopeptide-91 SH-Polypeptide-2?
Anyone with a known allergy to synthetic peptides (rare) Those expecting instant or dramatic 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.