VITAMINS hair cosmetics Keratin Hair Serum with Biotin — 4.25 fl oz (125mL) Heat Protectant & Anti‑Frizz Shine

VITAMINS Keratin Hair Serum is a lightweight, leave-in treatment that smooths frizz, shields hair from heat up to 450°F, and adds glossy shine with biotin, castor oil, hydrolyzed keratin and collagen.

This salon-rooted formula, refined across three generations, brings a professional-grade keratin blend to everyday styling. Designed to replace multiple products, the serum works on damp or dry hair to seal cuticles, control flyaways and improve manageability without weighing strands down. It's formulated for color-treated, chemically processed, fine-to-coarse hair and omits sulfates, parabens and drying alcohols.

How do I use this serum for best results?

Apply a small amount to towel-dried hair to detangle and smooth before styling, or use a tiny touch on dry hair to tame flyaways. Start with the recommended drop count for your hair thickness and increase only if needed to avoid buildup. It layers well under other styling products and rinses out easily in your next wash.

• Fine hair: 1 drop distributed mid-length to ends
• Medium/wavy hair: 2 drops, focusing on frizz-prone areas
• Thick/curly hair: 3 drops, emulsified in palms then applied
• Use before heat styling for thermal protection up to 450°F

What benefits can I expect after one bottle?

Regular use delivers smoother texture, less humidity-driven frizz and a polished shine that looks like a salon finish. The keratin and collagen form a light coating on strands to reduce breakage and improve elasticity, while biotin and oils help maintain moisture balance and shine. Because only a few drops are needed per use, a 4.25 fl oz bottle stretches for months.

• Noticeably smoother, more manageable hair after the first application
• Reduced frizz and fewer flyaways for multiple days
• Economical: lasts roughly 4–6 months with typical use
• Multi-use: leave-in, heat protectant, and midday finisher

Is this serum safe for treated or fragile hair?

The formula is crafted to be gentle on color-treated, bleached, highlighted and chemically processed hair. Free from sulfates, parabens and alcohols that can strip or dry hair, it aims to support strand resilience without interfering with salon treatments. If you have a specific sensitivity, patch-test on a small section before full application.

• Compatible with keratin, color and chemical treatments
• Non-stripping base helps preserve salon color and gloss
• Lightweight texture minimizes buildup on fine or thin hair
• Patch test recommended for sensitive scalps

How does this product replace multiple styling steps?

Instead of separate leave-in conditioners, heat protectants and anti-frizz serums, this single formula handles all three roles. It seals the hair surface to reflect light and smooth texture while forming a lightweight barrier against styling heat and humidity. That streamlines your routine and frees up bathroom shelf space.

• Leave-in conditioning for daily manageability
• Thermal protection for blow dryers and flat irons
• Midday smoothing to refresh style without re-washing
• One bottle reduces need for multiple specialty products

Who is this for: This serum suits anyone seeking a versatile, professional-strength finishing product—from busy commuters who need quick frizz control to people with color-treated or chemically processed hair wanting gentler maintenance. It’s especially helpful for those who prefer low-commitment, high-impact styling: minimal product, visible shine, and reliable heat defense across all hair types.

Ingredients

Water, Glycerin, Dimethicone, Hydroxyethl Acrylate/Sodium Cocoyl Aminoacids, Cetrimonium Chloride, Fragrance, Hydrolized Keratin, Biotin, Soluble Collagen, Coconut Oil, Castor Oil, Argania Spinosa Kernel Oil, Triticum Vulgare (Wheat Germ) Oil, Vitamin E, Potassium Dimethicone Peg 7 Panthenyl Phosphate , Phenoxyethanol, Caprylyl Glycol, Amodimethicone, Trideceth 12, Sorbic Acid