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BioSilk

BioSilk Silk Therapy Original, Reconstructing Treatment For Adding Shine & Helping Prevent Split Ends, Sulfate, Paraben, & Cruelty-Free, 5.64 Oz

  • Based on 16,544 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Jul 30
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Size: 5.6 Fl Oz (Pack of 1)


Features

  • WEIGHTLESS LEAVEIN TREATMENT: Silk Therapy Original infuses hair with silk proteins to repair, smooth, and protect strands without heaviness.
  • REPAIRS & STRENGTHENS: Helps rebuild damaged hair, prevent split ends, reduce frizz and improve shine for healthierlooking hair.
  • ALLHAIR TYPES FORMULA: Gentle, crueltyfree, sulfate and parabenfree treatment suitable for straight, wavy, curly, fine or textured hair.
  • MULTIPURPOSE CARE: Use on wet or dry hair to detangle, condition, add shine, and help protect from heat and environmental stress.
  • BIOSILK: The quest for healthier hair is how BioSilk Silk Therapy emerged in 1986. The creation of the BioSilk Silk Therapy Original treatment has led to the development of a full range of BioSilk hair products.

Description

BioSilk is the original silk infused line of hair care products using natural pure silk in every product. Silk contains 17 of the 19 amino acids in hair and is the strongest fiber in the world equal to steel. Silk Therapy is the original weightless, leave-in silk replenishing and reconstructing treatment to repair, smooth and protect all hair types. Benefits: Ideal for all hair types Leave in replenishing & reconstructing treatment Fills any voids in cuticle layer Aids in preventing split ends Provides incredible shine

Language ‏ : ‎ English


Product Dimensions ‏ : ‎ 10.5 x 15 x 5.6 inches; 5.29 ounces


Manufacturer recommended age ‏ : ‎ 18 months - 8 years


Item model number ‏ : ‎ 7


UPC ‏ : ‎


Manufacturer ‏ : ‎ Farouk Systems


Best Sellers Rank: #5,055 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #27 in Hair Treatment Masks


#27 in Hair Treatment Masks:


Customer Reviews: 4.7 4.7 out of 5 stars (16,544)


Item Form: Gel


Hair Type: Damaged


Product Benefits: Shining, Smoothening, Split Ends Repair, UV Protection


Scent Name: Amber


Additional Features: Natural Ingredients, Not Tested On Animals


Package Type Name: Bottle


Hair Conditioner Type: Leave-In Hair Conditioner


Unit Count: 5.6 Fluid Ounces


Number of Items: 1


Item Dimensions: 10.5 x 15 x 5.6 inches


Liquid Volume: 5.64 fluid ounces


Size: 5.6 Fl Oz (Pack of 1)


Brand Name: BioSilk


Age Range Description: Adult


Manufacturer: Farouk Systems


UPC: 885376771088 633911401033 885892172208 885401537894 885529336812 633911651223 633911747223 885376888830


Global Trade Identification Number: 47


Included Components: Active Substance Combinations


Model Number: 7


Manufacturer Part Number:


Material Features: Cruelty Free


Material Type Free: BPA Free, Gluten Free, Paraben Free


Active Ingredients: vitamin e


Special Ingredients: Vitamin E


Recommended Uses For Product: Shine


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jul 30

This item is non-returnable:

This item is non-returnable

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Shine, protection and best aroma
Size: 5.6 Fl Oz (Pack of 1)
I’ve been using BioSilk Silk Therapy Original for years, and it’s still one of my go-to hair products. It leaves my hair feeling soft, smooth, and noticeably healthier without weighing it down. A little goes a long way, and it helps control frizz while adding a nice shine. It’s one of those products I always come back to because it just works. ... show more
Reviewed in the United States on April 21, 2026 by Jennifer Ojeda
    • Silky smooth
Size: 5.6 Fl Oz (Pack of 1)
Affordable treatment to smooth, reconstruct and protect hair. Moisturizes nicely as well. Easy to use, consistency is light and silky. Leave in, no hassle. No bad odor. My go to, love it.
Reviewed in the United States on June 8, 2026 by Maritza
    • Fantastic stuff!!!
Size: 5.6 Fl Oz (Pack of 1)
I used this product years & years ago when in high school & took a cosmetology class & it was used at the school off campus. I have an oily scalp but have highlighted & bleached my hair since I was 16 so the hair needs moisture to combat the damage. This serum is a miracle! I took a chance & looked for it some 30 years later on Amazon & here it is! It is just the best for untangling wet hair after washing without damage & without leaving hair weighed down & greasy looking! It's a leave-in so you don't have to rinse out & a little pea-sized puddle worked through wet hair is all you need. It is super slick for detangling with a wide-toothed comb but as long as you work it throughout your hair it doesn't dry to a crunchy state or goop up hair that is naturally oily & straight like mine. And when it drys, your hair will feel so soft & look so shiny and amazing without making it prematurely greasy. Oh, and it smells great too! ... show more
Reviewed in the United States on May 25, 2025 by Amanda A.
    • This should be my 4th bottle now!
Size: 5.6 Fl Oz (Pack of 1)
I’ve been using BioSilk Silk Therapy for a few years now, and I’m honestly blown away. My hair has always been on the dry and frizzy side, but just a few drops of this serum after washing make it feel silky smooth and look like I just stepped out of a salon. The shine is unreal, and it never feels greasy or weighed down. I also love that it works on both damp and dry hair, so I can use it for a quick touch-up before heading out. The scent is light and pleasant, and a little goes a long way, so the bottle will last a long time. This has become my go-to product for keeping my hair healthy, soft, and frizz-free. Highly recommend to anyone who wants that sleek, polished look without spending hours on styling! ... show more
Reviewed in the United States on August 13, 2025 by Ada
    • Needed in a dry climate with strong UV exposures. GOOD dupe for Olaplex no9
Size: 5.6 Fl Oz (Pack of 1)
If your hair has been untamed and you live in a more dry and UV exposed climate, this product can help your hair behave how you'd expect it would in a less dry climate. Without the use of heat/gel/hot blowdrying tools. It can also provide relief from clarifying shampoos which affect your hair when you are in a more dry climate. Compared to Olaplex antioxidant serum no9, it is an ok dupe great for the value. It lasts longer than no9 if you have lots of hair. Less product is required than no9 for distribution. Though it makes no claims to protect hair from UV/free radicals like no9 it will help you get your hair healthier and where you want it in 3 months if you're trimming off your split ends periodically. It will weigh down more your hair than no9 and make your hair appear more fatty after the first day. Not a bad thing if you live in a arid-climate that dries out your hair. Certainly better than applying no protections or using a plant-oil for your hair inbetween washes. Unlike Olaplex no9 serum, the application lasts days, if you apply to damp hair after washing. It also has a higher viscosity that requires less amount and less applications post wash. It can save you between wash days. If you are not trying to dazzle with your hair down hairstyle on the daily and are ok with heavier/fattier appearing between washes. For example in a dry climate you might wear a protective style and a sun hat. It works very well for growing hair. The product has enabled me to grow out healthier hair, seal hair ends, and brush my hair with ease all week long. Where my hair was previously prone to daily tangling, split ends and dryness. A great product with great value. A small provision also last a while and the proce os ve ty reasonable. This product has been life changing for my hair. It is common for shampoos and washes to dry out hair, despite product claims to add moisture or body. In an arid climate, that simply doesn't apply. This product will leave hair manageable and helathier if used as directed (apply to damp hair after washing. Reapply as needed to dry hair to untangle and reduce frizz). ... show more
Reviewed in the United States on May 11, 2024 by Local User[ommited]
    • Great product but sometimes difficult to use
Size: 5.6 Fl Oz (Pack of 1)
The product works well with two caveats. One, the product is thick, and I find it difficult to distribute it on my dry hair even on the ends. I get a clump one area and nothing in other areas. I have only tried it on dry hair, so maybe I should try it on wet. But where it does get applied, it’s magical, and how it softens the hair and shines TWO, the bottle leaks. I don’t know if after the first use there’s some oily product in the closable top and thus it no longer closes all the way. I’ve wasted at least a third of the bottle via leakage. So beware! Place in a Ziploc bag, if you travel and expect there to be some product in the bag when you land. ... show more
Reviewed in the United States on April 7, 2026 by Karen K
    • Smells Amazing
Size: 5.6 Fl Oz (Pack of 1)
Review Image by Zulema Lopez
This is my go to serum leaving my hair soft and smelling amazing and clean. I been using it for more than two decades. I have tried other products and nothing compares
Reviewed in the United States on July 10, 2026 by Zulema Lopez
    • Works great. Light, not oily.
Size: 5.6 Fl Oz (Pack of 1)
Love this stuff. I have very long hair and this keeps it from tangling and keeps it soft. Very light and not oily at all. My hairdresser always says I have very healthy hair.
Reviewed in the United States on May 18, 2026 by Amazon Customer

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