What Is Sr-Rainbow Trout Oligopeptide-1 Sh-Polypeptide-9?
Sr-Rainbow Trout Oligopeptide-1 Sh-Polypeptide-9 is a lab designed fusion of two naturally occurring peptides, one originally identified in rainbow trout and the other related to human growth factors. Scientists combine their gene sequences, then insert the new gene into a harmless strain of E. coli. During fermentation the bacteria churn out the single chain peptide, which is later purified and checked for quality. The finished ingredient holds 126 amino acids that may form stabilizing disulfide bonds or carry small sugar groups, giving the peptide the right shape for skin and hair friendly action.
Peptide research moved into cosmetics in the 1990s when brands looked for milder anti aging and conditioning options. The rainbow trout fragment is prized for its soothing profile while the sh-Polypeptide-9 segment echoes the skin renewing signals of human proteins. By fusing them, formulators get a stable, water soluble ingredient that fits smoothly into modern clean beauty formulas.
You will most often spot Sr-Rainbow Trout Oligopeptide-1 Sh-Polypeptide-9 in lightweight serums, leave-on hair masks, daily moisturizers, eye creams, scalp treatments, barrier repair lotions and post-peel soothing gels. Because it is active at low doses it rarely changes the feel or scent of a product, which lets brands add it to both fragrance-free and luxury scented lines.
Sr-Rainbow Trout Oligopeptide-1 Sh-Polypeptide-9’s Cosmetic Benefits/Uses
This multitasking peptide supports both skin and hair care goals.
- Hair conditioning: Forms a thin breathable film over strands which smooths the cuticle, reduces frizz and helps hair feel softer after washing
- Emollient: Adds a light silky slip to creams and serums, improving spreadability and giving skin an instant soft touch finish
- Skin protecting: Supports the skin’s barrier by attracting water and calming surface irritation which may help reduce dryness and the look of redness
Who Can Use Sr-Rainbow Trout Oligopeptide-1 Sh-Polypeptide-9
Because it is lightweight and water soluble this peptide suits nearly all skin types including dry, normal, combination, oily and even sensitive skin. It has no known ingredients that clog pores or overly coat the surface so acne prone users generally tolerate it well. Those with a history of protein or peptide allergies should still proceed with caution as any bioactive protein can, in rare cases, trigger an immune response.
Sr-Rainbow Trout Oligopeptide-1 Sh-Polypeptide-9 is produced through bacterial fermentation and is purified without animal derived additives which makes it appropriate for vegans and vegetarians.
No specific warnings exist for use during pregnancy or while breastfeeding. As with any new cosmetic though this information is not medical advice and pregnant or nursing women should first discuss new products with their health care provider.
The peptide does not make skin more reactive to the sun so it is not considered photosensitizing. It also plays well with common actives such as vitamin C, niacinamide and retinol, letting you layer it into most routines without special timing rules.
Potential Side Effects/Adverse Reactions
Responses to topical Sr-Rainbow Trout Oligopeptide-1 Sh-Polypeptide-9 differ from person to person. The effects listed below are only potential outcomes. When the ingredient is well formulated most people will experience none of these issues.
- Mild redness or warmth at the application site
- Temporary itching or tingling as the peptide settles on the skin
- Rare allergic reaction presenting as hives or swelling
- Eye irritation if product accidentally contacts the eyes
If any uncomfortable reaction occurs discontinue use and speak with a qualified health professional.
Comedogenic Rating
Rating: 0 / 5
Sr-Rainbow Trout Oligopeptide-1 Sh-Polypeptide-9 is a small water soluble peptide that does not leave a heavy or greasy film on the skin. Because it lacks oils, waxes or thick silicones that can block pores, it earns the lowest possible comedogenic score. This makes it suitable for people who are prone to acne or breakouts.
Keep in mind that a finished product’s pore-clogging potential depends on the full formula, so always check the other ingredients if you are highly sensitive.
Summary
Sr-Rainbow Trout Oligopeptide-1 Sh-Polypeptide-9 is a lab made fusion peptide that conditions hair, softens skin and helps protect the skin barrier. It forms a light film over hair strands for smoother feel and less frizz, adds a silky glide to lotions for quick absorption and attracts moisture while calming redness so the skin barrier stays comfortable.
The ingredient is still a niche player, showing up mostly in higher end serums and targeted treatments, yet its gentle profile and multitasking benefits are winning it steady attention from formulators looking for modern peptide options.
Overall safety is high, with very low rates of irritation or pore clogging. As with any new skincare or haircare product it is wise to patch test first to be sure your skin agrees with the full formula.