Saturday Skin Scalp Peptide Overnight Serum 2.7 fl oz — Caffeine & 15-Peptide Complex for Thicker, Stronger Hair

Saturday Skin Scalp Hair Strengthening Peptide Treatment is an overnight, leave-on serum formulated to help invigorate the scalp and visibly strengthen hair for fuller-looking strands.

This lightweight overnight serum combines caffeine, a 15-peptide complex (including collagen and keratin components), niacinamide and clarifying actives to support scalp vitality and the appearance of stronger, thicker hair. Designed to be used on a clean, dry or towel-dried scalp, the non-greasy formula absorbs quickly and works while you sleep so you can wake to smoother, more resilient-looking hair without adding weight.

How does this serum support a tired or thin-looking scalp overnight?

The formulation targets surface scalp health and follicle support with stimulating and barrier-balancing ingredients. While you rest, caffeine helps energize the scalp environment and salicylic acid gently clarifies, while peptides and nutrients focus on strengthening the hair shaft and follicle appearance.

• Caffeine to stimulate scalp circulation and enliven the feel of the scalp.
• Salicylic acid to exfoliate and remove build-up for clearer follicles.
• Peptide complex to reinforce hair structure and elasticity.

Will this serum weigh my hair down or leave a greasy residue?

No—Saturday Skin’s formula is designed to be lightweight and fast-absorbing. It provides a cooling, non-greasy finish so you can apply a few drops without adding heaviness, making it suitable for fine or thicker textures alike.

• Fast-absorbing texture that won’t weigh down strands.
• Cooling sensation for an energized scalp feel.
• Leave-on formula—no rinsing required.

How should I use the treatment for best results?

Use it once daily, ideally at night, on a clean, dry or towel-dried scalp. Shake the bottle, dispense a few targeted drops where you want support, massage gently to distribute the serum, and leave it on overnight to work while you sleep.

• Apply to clean, dry or towel-dried scalp once a day.
• Shake well, part hair and dispense a few drops to key areas.
• Massage gently—leave on overnight, no rinse needed.

Is this serum safe for sensitive scalps and all hair types?

The formula is dermatologist-tested and excludes parabens, sulfates, synthetic fragrance and artificial color, making it a gentle option for many users. Niacinamide helps support the scalp barrier while hop yeast and growth factors provide nutrients that aim to improve scalp clarity and strand resilience.

• Dermatologist tested and free from common irritants like sulfates and parabens.
• Designed for all hair types, including thin, dry and combination scalps.
• Uses barrier-supporting niacinamide and nutrient-dense hop yeast.

Who is this for: Saturday Skin Scalp Hair Strengthening Peptide Overnight Serum is aimed at anyone noticing thinning, dry or lackluster hair who wants a simple nightly step to improve scalp clarity and strengthen the look of hair over time. It’s suitable for people with fine or medium hair, those who prefer lightweight, leave-on treatments, and anyone looking to add scalp-targeted peptides, caffeine and niacinamide into their haircare routine without heavy oils or greasiness.

Ingredients

WATER/AQUA/EAU, BUTYLENE GLYCOL, NIACINAMIDE, OCTYLDODECETH-16, POLYSORBATE 20, TROMETHAMINE, ACRYLATES/C10-30 ALKYL ACRYLATE CROSSPOLYMER, MENTHOL, SODIUM BENZOATE, SALICYLIC ACID, CAFFEINE, CHLORELLA VULGARIS EXTRACT, GLUCOSE, PANTHENOL, POTASSIUM SORBATE, FRUCTOOLIGOSACCHARIDES, FRUCTOSE, GLYCERIN, 1,2-HEXANEDIOL, MENTHYL PCA, ETHYL MENTHANE CARBOXAMIDE, GLYCINE SOJA (SOYBEAN) SEED EXTRACT, CAPRYLIC/CAPRIC TRIGLYCERIDE, PROPYLHEPTYL CAPRYLATE, HYDROGENATED LECITHIN, PENTYLENE GLYCOL, PROPANEDIOL, COCOGLYCERIDES, PHENYL TRIMETHICONE, CYNANCHUM ATRATUM EXTRACT, OCTANEDIOL, ETHYLHEXYLGLYCERIN, CAPRYLYL GLYCOL, ALTHAEA ROSEA FLOWER EXTRACT, DIPOTASSIUM GLYCYRRHIZATE, SACCHAROMYCES CEREVISIAE EXTRACT, SERINE, GLUTAMIC ACID, ASPARTIC ACID, CERAMIDE NP, CHOLESTEROL, STEARIC ACID, LEUCINE, SH-OLIGOPEPTIDE-1, SH-POLYPEPTIDE-1, SPHINGANINE, PHOSPHATIDYLCHOLINE, ALANINE, LYSINE, ARGININE, TYROSINE, PHENYLALANINE, PROLINE, THREONINE, VALINE, ISOLEUCINE, POLYGLYCERYL-10 LAURATE, HISTIDINE, CYSTEINE, METHIONINE, GLYCINE, ACETYL HEXAPEPTIDE-8, COPPER TRIPEPTIDE-1, PALMITOYL PENTAPEPTIDE-4, TRIPEPTIDE-1, ALANINE/HISTIDINE/LYSINE POLYPEPTIDE COPPER HCL, HEXAPEPTIDE-9, PALMITOYL TRIPEPTIDE-1, SH-OLIGOPEPTIDE-14, SH-OLIGOPEPTIDE-2, SH-POLYPEPTIDE-45, SH-POLYPEPTIDE-7, SH-POLYPEPTIDE-9.