VITAMINS hair cosmetics Keratin Hair Serum 4.25 fl oz — Biotin, Heat Protectant & Anti‑Frizz Shine

VITAMINS Keratin Hair Serum is a lightweight, leave-in treatment that smooths frizz, protects from heat, and adds glossy shine using keratin, biotin, collagen, and nourishing oils.

This professional-strength serum brings an 80-year salon keratin formula into an everyday bottle. Designed as a multi-use product, it combines leave-in conditioning, thermal defense for styling tools up to 450°F, and a finishing polish that helps tame flyaways and humidity without buildup. The formula is safe for color-treated and chemically processed hair, and it’s free from sulfates, parabens, and drying alcohols.

How does this serum speed up my styling routine?

Use it on damp hair to reduce drying time and smooth the cuticle before blow-drying or straightening. Its lightweight keratin-collagen mix coats strands so heat moves through hair more evenly, helping tools work faster and leaving a sleeker result.

• Apply 1–3 drops depending on hair thickness.
• Works as a blow-dry primer and flat-iron protectant up to 450°F.
• Replaces separate leave-in, heat protectant, and anti-frizz serums.
• Non-greasy formula avoids weighing hair down.

Will it actually control frizz in humid conditions?

The keratin and collagen in this serum form a smooth coating around each strand that helps repel moisture and reduce cuticle lifting—two main causes of frizz. Many users notice smoother hair for days after styling, even in humid environments.

• Seals and smooths the hair surface to limit water absorption.
• Softens flyaways and polishes for a glass-like shine.
• Light texture keeps roots from becoming flat or oily.

Is this safe for color-treated, thin, or chemically processed hair?

The formula is formulated to be gentle yet effective on all hair types, from fine to coarse and straight to curly. It contains strengthening ingredients like biotin and hydrolyzed keratin to support hair resilience without silicones that can mask damage.

• Recommended dosing: 1 drop for fine, 2 for medium, 3 for thick/coarse hair.
• Safe for bleached, highlighted, and keratin-treated hair.
• Sulfate-, paraben-, and alcohol-free; cruelty-free.

How long does one bottle last and what value does it offer?

Because you only need a few drops per use, a 4.25 fl oz bottle delivers months of applications — commonly 4–6 months depending on frequency. The concentrated format provides salon-grade performance at a fraction of the cost of multiple specialty products.

• 4.25 fl oz concentrated bottle with low-per-use dosing.
• Less than $0.15 per application when used as directed.
• Combines three functions into a single, space-saving product.

Who is this for: VITAMINS Keratin Hair Serum is ideal for anyone who wants salon-smooth results without a bulky routine — from time-pressed commuters and heat-styling regulars to people with frizz-prone or chemically processed hair. If you prefer lightweight finishes that add shine, manageability, and thermal protection in one step, this serum is designed to fit into daily styling and maintenance rituals.

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