C.O. Bigelow – The Oldest Apothecary in America – Established 1838

The Fixer Molecular Treatment Serum

The Fixer Molecular Treatment Serum - Main image
The Fixer Molecular Treatment Serum
$26 $52 In stock

Category: Beauty

Self-care for your hair. This sheer, weightless repair serum provides clinically-proven repair to damaged hair on a molecular level. It penetrates deep to strengthen root to tip, repair split ends, and protect against future damage + breakage. Use in the morning before styling for daily protection, or as overnight repair for lush, replenishing moisture. Helps protect strands against the elements, pollution, and UV rays. Skincare for your strands.

Key Ingredients:
- Copper Tripeptide strengthens hair from the inside out to improve scalp health and support a healthy hair lifecycle
- Rice Complex repairs split ends
- Creatine boosts the look and feel of damaged or compromised hair
- Orange Fruit Extract mimics hair’s natural proteins to hydrate, strengthen, and maintain manageability over time
- Chia Seed + Green Tea Leaf Extract provide antioxidant protection and help defend against environmental pollutants

Clinically Proven:
- Instantly repairs 94% of split ends (after just one use)
- Prevents future damage — over 4x less breakage (after just one use)
- Visibly smooths and seals the cuticle for stronger, healthier-looking hair
- Makes even intensely damaged hair look smoother and healthier
- Protects from heat damage up to 450º F

2 oz

Customer Reviews (4.7 / 5 · 13 reviews)

Amelia G. ★★★★★

My ends were a frayed mess from years of heat styling, but after three weeks of using this serum nightly, they actually look sealed and smooth under my bathroom light. It's completely sheer and weightless like the description says, no greasy buildup even on my fine hair, and the split ends are visib

Nicholas ★★★★★

I've been blow-drying my hair almost daily for years and this is the first serum that actually feels weightless—my hair still moves naturally instead of feeling plastered down. The split ends aren't completely gone, but they're noticeably smoother and the repair really does seem to go deeper than th

Riley M. ★★★★★

Three weeks in and my split ends are actually gone — I can run my fingers through my hair without hitting a single snag. It's completely weightless too, no greasy residue even when I apply it daily. Worth every penny for the amount of product you get.

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