BioSilk Silk Therapy Original Leave-In Hair Treatment, 7 oz — Lightweight Silk Protein for Shine & Frizz Control

BioSilk Silk Therapy Original is a lightweight, leave-in silk protein treatment that helps smooth, strengthen, and add shine to all hair types.

Formulated to revive dull, dry, or damaged strands, this reconstructing leave-in treatment layers a silk-protein complex onto hair without weighing it down. Its gentle, sulfate- and paraben-free formula can be used on damp or dry hair to detangle, protect from styling stress, and improve manageability while delivering visible gloss. The product has been part of BioSilk’s professional haircare range since the brand introduced silk-infused treatments in the 1980s.

How will this treatment change my daily styling routine?

Applying a small amount of BioSilk Silk Therapy Original smooths the cuticle, reducing frizz and making hair easier to comb and style. Because it is leave-in and lightweight, it simplifies morning routines and pairs well with heat tools for added protection.

• Use on damp hair before blow-drying to detangle and protect.
• Apply on dry hair to tame flyaways and boost shine.
• Works under other styling products without building up weight.

Will this help if my hair is chemically treated or heat damaged?

The silk proteins in the formula help condition and temporarily fortify weakened strands, improving resilience and appearance after chemical processing or frequent heat styling. It doesn’t repair at a molecular level like salon treatments, but it provides immediate smoothing and protective benefits that reduce the look of split ends and breakage.

• Replenishes surface proteins to improve texture and manageability.
• Minimizes the visible effects of split ends and roughness.
• Offers everyday protection from thermal tools and environmental stressors.

How much should I use, and how often?

A little goes a long way: start with a pea-sized amount for short hair or one to two drops for longer, thicker hair and adjust as needed. The treatment is designed for daily use or as needed between washes to refresh shine and control frizz without residue.

• Short or fine hair: tiny dab distributed through ends.
• Medium to long hair: run a small amount through mid-lengths to ends.
• Use after every wash or when hair needs smoothing and protection.

Is this product suitable for my hair type and preferences?

BioSilk Silk Therapy Original is formulated to work across hair textures—straight, wavy, curly, coily and textured—because it focuses on surface conditioning rather than heavy moisture build-up. It is cruelty-free and free from sulfates and parabens, making it a versatile option for those who prefer gentler ingredient profiles.

• Safe for color-treated and chemically processed hair when used as directed.
• Non-greasy finish so fine hair won’t feel weighed down.
• Cruelty-free and free of sulfates and parabens for peace of mind.

Who is this for: BioSilk Silk Therapy Original is aimed at people seeking an easy-to-use leave-in product that enhances shine, smooths texture, and helps protect hair from daily styling and environmental stress. It’s a practical choice for anyone wanting a lightweight finishing treatment—especially those with damaged, frizzy, or color-treated hair who prefer sulfate- and paraben-free care.

Ingredients

Cyclopentasiloxane, Cyclotetrasiloxane, Dimethiconol, Cyclohexasiloxane, Alcohol Denat, C12-15 Alkyl Benzoate, Phenoxyethanol, Panthanol, Ethyl Estedr of Hydrolyzed Silk, Fragrance, Benzyl Benzoate, Hexyl Cinnamal, Linalool, Alpha-Isomethyl Ionoe, Citronellol, Gerniol, Hydroxycitronellal, Butylphenyl Methylpropional, Eugenol, BCC12-Base