BioSilk Silk Therapy Leave-In Hair Treatment — 7 oz Lightweight Reconstructing Serum for Shine & Smoothness

BioSilk Silk Therapy Original is a lightweight, leave-in silk protein treatment that reconstructs and smooths hair while adding shine and helping prevent split ends.

Designed as a daily finishing and repairing product, this 7-ounce formula layers silk-derived proteins over strands to improve manageability and appearance without weighing hair down. The non-greasy serum can be applied to wet or dry hair to detangle, control frizz, and create a polished finish. It is formulated without sulfates or parabens and is cruelty-free, making it suitable for many hair care routines.

How does this treatment restore damaged hair?

Silk-derived proteins in the formula bond to the hair surface, temporarily strengthening weakened areas and smoothing rough cuticles. Regular use helps reduce the look of split ends and makes hair easier to comb, so styling causes less breakage and stress.

• Silk proteins layer over strands to reinforce and smooth.
• Helps minimize split ends appearance and breakage during styling.
• Improves comb-through to reduce mechanical damage.

Can I use it on all hair textures and how much should I apply?

The lightweight formula works on straight, wavy, curly, fine, and textured hair; you only need a small amount to see benefits. Apply a pea- to dime-sized drop for short hair and increase slightly for thicker or longer hair, focusing on mid-lengths and ends to avoid buildup at the roots.

• Fine hair: use very sparingly to prevent weigh-down.
• Thick/curly hair: use a larger amount, distribute evenly through ends.
• Safe for daily use on wet or dry hair for detangling and shine.

Will it protect hair from heat and environmental stress?

While not a replacement for a dedicated thermal protector, the silk coating helps smooth cuticles and reduces friction, which can make hair more resilient during heat styling. It also adds a lightweight barrier that helps shield hair from humidity and environmental aggressors that cause frizz and dullness.

• Provides a smoothing layer that reduces friction from heat tools.
• Helps resist humidity-induced frizz for a sleeker look.
• Use before blow-drying or flat ironing to improve finish.

How should I incorporate BioSilk into my routine for best results?

Use it as a finishing product after towel-drying to detangle and add shine, or apply a small amount to dry hair to tame flyaways and refresh style. Combine with your regular shampoo and conditioner; for severely damaged hair, layer with strengthening treatments once or twice weekly.

• Apply to damp hair before styling to detangle and smooth.
• Use a tiny amount on dry hair to polish ends and control frizz.
• Pair with deep-conditioning masks for intensive repair sessions.

Who is this for: BioSilk Silk Therapy Original is aimed at anyone looking to improve the look and manageability of their hair—people with color-treated, heat-styled, frizz-prone, or simply dry, dull hair will find it especially useful. Its lightweight, sulfate- and paraben-free formulation makes it a convenient everyday product for those who want a polished, smoother finish without heavy residue.

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