Ingredient review
SH-Polypeptide-98
INCI: SH-Polypeptide-98
A synthetic peptide that may help reduce fine lines and support firmer-looking skin, but more human studies are needed to confirm its effects.
In plain English
SH-Polypeptide-98 is a lab-made chain of amino acids (the building blocks of protein) that skincare companies add to anti-aging products. It's designed to signal your skin cells to produce more collagen, which naturally decreases as we age. Think of it as a tiny messenger that tells your skin to plump up and smooth out. While it shows promise in lab tests, real-world results vary, and it works best as part of a consistent routine with sunscreen and moisturizer.
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
SH-Polypeptide-98 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 SH-Polypeptide-98.
- 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, specifically a hexapeptide (a chain of six amino acids), engineered to mimic naturally occurring signaling molecules in the skin. It is produced in a laboratory and not derived from plants or animals.
How it works
When applied topically, SH-Polypeptide-98 is believed to penetrate the outer layer of the skin and bind to receptors on fibroblasts (the cells that make collagen). This binding triggers a signaling cascade that encourages fibroblasts to increase collagen production, which can help improve skin firmness and reduce the appearance of fine lines over time.
Pros
Gentle anti-aging support
SH-Polypeptide-98 is generally non-irritating and suitable for sensitive skin types, making it a milder alternative to stronger actives like retinoids.
Collagen-boosting potential
By signaling skin cells to produce more collagen, it may help improve skin firmness and reduce the appearance of fine lines over consistent use.
Cons and cautions
Limited human research
Most studies on SH-Polypeptide-98 are lab-based or on animal models. There are few robust human clinical trials to confirm its real-world anti-aging benefits.
Variable results
The effectiveness of this peptide can depend heavily on the formulation, concentration, and individual skin biology, so results may be subtle or inconsistent.
Best for
- Adults looking to address early signs of aging like fine lines and loss of firmness
- Those with sensitive skin who want a gentle anti-aging option
Use caution if
- Anyone with a known allergy or sensitivity to synthetic peptides (rare)
Usage tips
Safety summary
SH-Polypeptide-98 is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic risks, making it suitable for most skin types. However, as with any new ingredient, patch testing is recommended.
Research notes
Evidence for SH-Polypeptide-98 is primarily from in vitro (lab) studies showing collagen stimulation. Human studies are limited but suggest potential for reducing fine lines. More rigorous clinical trials are needed to establish efficacy conclusively.
Common label clues
- Typical concentration
- 0.5% to 2%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. It is not a drug and cannot claim to treat or cure skin conditions.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- As a synthetic peptide, its production has a lower environmental footprint compared to animal-derived ingredients, but it is not biodegradable and may accumulate in water systems.
Good to know
- Peptides like SH-Polypeptide-98 are often combined with other anti-aging ingredients like niacinamide or vitamin C for synergistic effects.
- Store peptide products away from direct sunlight and heat to maintain stability.
Common questions
What is SH-Polypeptide-98 in beauty products?
SH-Polypeptide-98 is a lab-made chain of amino acids (the building blocks of protein) that skincare companies add to anti-aging products. It's designed to signal your skin cells to produce more collagen, which naturally decreases as we age. Think of it as a tiny messenger that tells your skin to plump up and smooth out. While it shows promise in lab tests, real-world results vary, and it works best as part of a consistent routine with sunscreen and moisturizer.
What does SH-Polypeptide-98 do in a beauty product?
When applied topically, SH-Polypeptide-98 is believed to penetrate the outer layer of the skin and bind to receptors on fibroblasts (the cells that make collagen). This binding triggers a signaling cascade that encourages fibroblasts to increase collagen production, which can help improve skin firmness and reduce the appearance of fine lines over time.
Is SH-Polypeptide-98 safe for most people?
SH-Polypeptide-98 is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic risks, making it suitable for most skin types. However, as with any new ingredient, patch testing is recommended.
Who should be careful with SH-Polypeptide-98?
Anyone with a known allergy or sensitivity to synthetic peptides (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.