BioSilk Silk Therapy Original leave-in silk protein treatment 5.64 oz — lightweight shine, frizz control

BioSilk Silk Therapy Original is a lightweight, leave-in silk protein treatment designed to smooth, add shine, and help reduce split ends for all hair types.

Formulated with purified silk proteins that mirror hair's natural building blocks, this classic reconstructing treatment seals the cuticle, tames frizz, and restores surface gloss without weighing hair down. The formula is free from sulfates and parabens, not tested on animals, and works on straight, wavy, curly, fine, or textured hair. Use it after washing or between styles to detangle, protect from heat, and enhance manageability.

How does BioSilk Silk Therapy repair and strengthen hair?

The silk proteins in this formula help fill gaps in the hair cuticle and reinforce weakened areas to improve texture and resilience. Rather than coating hair with heavy oils, it delivers lightweight reconstruction so strands feel smoother and more flexible.

• Silk proteins that mimic hair amino acids to support structure
• Penetrates surface layers to smooth raised cuticles
• Reduces breakage risk by improving strand pliability

When and how should I apply this leave-in treatment?

Use a small amount on towel-dried hair to detangle and protect before styling, or apply a touch to dry lengths for added shine and frizz control. Start with a dime-sized dose and increase only if hair is thick or very dry to avoid buildup.

• Apply to damp hair for easier combing and heat protection
• Use on dry hair to revive shine and smooth flyaways
• Layer under styling products or serums without causing heaviness

Will this product work for my hair type and color-treated hair?

Yes — the formula is formulated to suit a wide range of textures and is gentle enough for color-treated hair. It improves manageability and visible shine without stripping color or adding undue weight.

• Safe for chemically-treated and heat-styled hair
• Suitable for fine hair when used sparingly
• Provides smoothing benefits for textured and curly hair

What extra benefits does BioSilk Silk Therapy offer beyond shine?

Beyond gloss, it helps prevent the formation of split ends and shields strands from thermal and environmental stressors. The multipurpose nature means it can replace heavier leave-ins or serums for many styling routines.

• Helps minimize split ends and visible fraying
• Acts as a lightweight barrier against heat styling
• Improves slip for easier combing and reduced snagging

Who is this for: This treatment is ideal for anyone seeking a fuss-free, lightweight reconstructing product that adds shine and smoothness without heavy oils — from people with fine, limp hair to those with coarse, textured strands and color-treated locks. If you want a versatile, cruelty-free leave-in that repairs surface damage, aids detangling, and boosts shine, BioSilk Silk Therapy Original is designed to fit into daily and styling routines.

Ingredients

C13-14 Isoalkane Dimethiconol Isododecane Alcohol Denat. Panthenol Ethyl Ester of Hydrolyzed Silk Fragrance (Parfum) Alpha-Isomethyl Ionone Benzyl Benzoate Citronellol Eugenol Geraniol Hexyl Cinnamal Hydroxycitronellal Linalool