BioSilk Silk Therapy Original

(46 customer reviews)


0.5 oz2.26 oz5.64 oz7 oz12 oz34 oz

BioSilk Silk Therapy Original is a weightless leave-in silk replenishing and reconstructing treatment that helps repair, smooth and protect all hair types.

  • Fills voids in cuticle to create smooth hair
  • Aids in preventing split ends
  • Provides incredible shine


BEAUTY MAG: Top Beauty Pics 2021


Product Description

This quest for healthier hair is how BioSilk Silk Therapy emerged in 1986. For centuries, silk was celebrated as a luxurious fabric due to its smooth texture and brilliant luster. Throughout history, silk clothed royalty and the elite, continually evolving with fashion trends to be one of the most coveted fabrics of all times.

The launch of BioSilk Silk Therapy was yet another first since natural pure silk had never been used in hair care before. It was created as a weightless, leave-in silk replenishing and reconstructing treatment to repair, smooth and protect all hair types.

BioSilk Silk Therapy continues to be one of the company’s strongest product offerings, winning countless beauty awards throughout the years, and is recognized brand among 97% of women.

How to Use

How to Use

Shake well before use. Place a small amount of silk therapy in the palms and apply from the scalp to ends. May be used on wet or dry hair or skin. Us as often as necessary.

Download Documents

Video Gallery

Video Gallery



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

Reviews (46)

46 reviews for BioSilk Silk Therapy Original

    Jennifer M.
    September 23, 2021
    I have used this for over 20 years, and I love it! People always say how nice and shiny it makes my hair look. And it makes combing after a shower so much easier.
    September 6, 2021
    The worst product ever used it makes my hair like a net and I shed hair since I started it
    Marteena L Chastain
    August 10, 2021
    Is this product safe to use during pregnancy and breastfeeding
    July 18, 2021
    I have some of this that I got years ago from my hairdresser. I hope it's the same now. It came in a squeeze bottle with a dome-type cap. I love it and hope it still smells the same, as I'm fond of the fragrance of my original product.
    Vanessa Meyer
    July 8, 2021
    I ordered Biosilk on a YouTube video recommendation. I was disappointed to find two of the top 5 ingredients are Dimethiconol also known as silicone which seals your hair so moisture cannot get in creating brittle hair. and Alcohol Denat. otherwise known as Denatured Alcohol which is known for drying out hair and skin. For the $49 price tag, I expect better and more thoughtful ingredients.
    June 24, 2021
    My beautician daughter bought it for me 15 years ago when I was contemplating a wig as last resort to bad hair it is amazing wonderful hair NO WIGS!
    Tammi Dormuth
    June 19, 2021
    I have been using this product for more than 20 years and LOVE it! My long, straight hair is always shiny and soft, and I save on drugstore shampoo and conditioner!
    Stephanie Luellen
    May 22, 2021
    I love biosilk since the first time I tried it. Now I cant help myself but to rant and rave about it to whoever comes into my home. Making them try it for them selves and they of course they it on the spot just to make me stop talking about it. Lol.
    May 17, 2021
    Before using Biosilk my hair was unmanagable and the ends were very dry. I use only a dime size amount of Biosilk ,and my hair is so healthy and shining. If you try Biosilk you will never stop using this product.
    Donna A College
    May 8, 2021
    My hairstylist gave me a sample of Biosilk with which I fell in love! It smells so clean and leaves my hair smooth and flat. Now I use the sample bottle for travel and order my large bottles on line.
    May 3, 2021
    I have used this on my dry brittle hair for at least 10 years & it is amazing!!! I can't do my hair without it!! Please keep making it!!
    April 27, 2021
    Great buy in larger size. I have thick coarse hair and this really works to stop the fuzziness. Have used it for years and nothing else compares to it. So happy to be able to purchase it here as could no longer buy it locally.
    April 20, 2021
    Fantastic product and it smells absolutely amazing!!
    Patricia vielmas
    March 31, 2021
    Not sure if it's the same as 10yrs ago but before it use to leave my hair smooth and shiny.
    Lela Witcher
    March 23, 2021
    I have been using this for years and absolutely love it and smells great!!
    March 18, 2021
    This product is pricy, but it is absolutely amazing. A little bit goes a long way. I have very long, silky, straight hair and it works wonders for brushing it without the tangles. It really prevents split ends. It makes the hair very silky without being greasy.
    March 13, 2021
    I love this stuff !!! I have very dry hair and this helps, so it's not so brittle. I make sure I always have some on hand.
    February 7, 2021
    January 20, 2021
    I’ve been using this product for years. I love it. It makes my hair soft and shiny and so much more manageable. A little product goes a long way so it lasts a while.
    Martine Briand
    December 26, 2020
    BioSilk Silk Therapy is a great product, does miracle on my hair and skin but the perfume is awful! Will purchase again only if a non-perfumed version comes on the market.
    Olga Cubillas
    December 16, 2020
    I have been using the Biosilk therapy original for over 25 years! Yes! 25. It leaves my long hair feeling silky and looking healthy. And a little bit of product goes a long way :)
    October 1, 2020
    So in love with this product, it is absolutely amazing!
    September 26, 2020
    I have very curly, frizzy hair and this product works great! It makes my hair super soft and minimizes frizz. It's expensive, but it lasts a long time, so totally worth the splurge.
    September 8, 2020
    Great value for money a lil but last a long time!
    R Mill
    August 1, 2020
    My friend introduced me to BioSilk Silk Therapy years ago. I am continually amazed how much it protects my hair. Normally my hair gets so frizzy while being blow dried, but just a bit of silk therapy protects it. I don’t have to straighten my hair if I use silk therapy!
    Lily Herne
    June 25, 2020
    Biosilk original silk is my secret for silky bleach blonde hair.
    June 5, 2020
    I have been using Sunglitz for years. I absolutley love it. I have been trying to find it under that name with no luck for months. With a little investigating came across Biosilk, same company. Ordered it. And it's the same thing. I could not be happier. Please never stop making this.
    Cindy Nicassio
    May 17, 2020
    I have been using this product for years. It is fantastic for hair and skin. You don't need to use a lot so the bottle lasts a long time. Great value for money.
    Hope Larsen
    May 13, 2020
    I have been using this product since almost very first came out. I was In my girlfriend's beauty salon and a guy came in and showed us the 3 pack shampoo conditioner and leave in conditioner. I bought two of those 3 packs. I absolutely loved them. She got them a few more times and then she couldn't get them and I couldn't find them anywhere. For 2 years I looked and then I finally found them in JC Penney. I bought it there for a few years Religiously.The closest JC penney Was almost 2 hours away and I went just to get it a few times. Most the time I was up there anyway but there is a few times I went up specifically for my biosilk. I don't remember where I got it after JC Penney close in that mall but I have started buying it in salons and it has been the absolute most amazing thing that's happened to my hair. My hair is thin And a very fine. Since all Or most of the salons have closed because of covid19. I'm now here going to order some because I think probably since that first time in my girlfriend salon has probably been about 22 years and I don't use anything else on my hair it is fabulous.
    Marie Kelly
    April 30, 2020
    I love Biosilk not only for my hair but I also use it for dry skin. It makes my skin feel soft and smooth. A little goes a long way.
    Rosemary Morales
    April 15, 2020
    Extremely helpful with tangles
    Lillian Stanciel
    February 7, 2020
    Really appreciate good hair products
    Jose luis rodriguez
    February 7, 2020
    I useto use this when i was in jr high when i would straighten my long and puffy would make it easier to straighten it and very shiny and not oily at all.i love it.worth the price
    February 7, 2020
    Biosilk Therapy is the only product that takes my hair! It smells great, defines every curl, and adds support all day long.
    Connie Turner
    February 7, 2020
    I have been using this product for over 10 years. I love it! It helps reduce the frizzies and keeps my hair smooth and much more manageable. I was really excited to find it on Amazon as I had not seen it in the beauty salon or Beauty Supply store for a while now. I was almost out when I found it. Yeah!
    D. Connelly
    February 7, 2020
    I have thick, wavy, FRIZZY hair. About six or seven years ago, the lady that cuts my hair introduced me to Biosilk and explained to me that I was over shampooing my hair type. It has completely changed how I think of my own hair. I freakin' LOVE my hair now. I use to think it was ugly and dry looking. Now I get compliments on my hair on a regular basis. A little bit goes a very long way. My hair routine is now wash, condition, towel dry, put in about a quarter sized amount of biosilk, scrunch it around a bit and move on with my day. The waves have better shape and the frizz is almost entirely gone. I haven't had problems with split ends or hair breaking since I started using it. It will be a very dark day in my world if they ever stop making this stuff.
    February 7, 2020
    I like this serum - it helps me brush through my long hair easier when wet... I was initially looking for a detangler but after my last hair appointment I noticed that my stylist use Biosilk Silk Serum and my hair was great afterwards - and decided to try it. I haven't noticed a special improvement in my hair health but it is definitely easier to comb my hair when wet, leaving my hair silky, so it did the job.
    Sara M. Urbano
    February 7, 2020
    For shoulder-length hair, a nickle-sized amount works great. Start at the ends of your hair the way you would condition it. Then with any leftover, finger-comb by roots. NO ADDITIONAL STYLING PRODUCT is necessary for blow drying. This works great by itslef- adds shine, controls effective and sweet-smelling product.
    February 7, 2020
    My ends are damage and frayed from perms and color treatments. I used a quarter-sized drop of Biosilk for my long hair and it does improve the feel and look of my hair. Two quarter-sized drops and I'm golden!
    Ronica C.
    February 7, 2020
    Good deal. Nice product.....Did wonders on my Type 3/4 Afro-American natural hair. Gave some to my sister who is bi-racial, but has very curly hair and she loves it too. We used just regular ceramic flat-irons along with this product. Still did a great job.
    December 26, 2019
    I have always had trouble with my dry curly hair. I have tried so many different products over the years I am 45 so u can try to imagine the money that I wasted trying expensive products. About 7 years ago I tried Biosilk Silk Therapy and it changed my life, will never use anything else ever again! And having to daughters both with very long hair, they both love it also, you can only imagine how much we go through. Thank you for an awesome product, it's the only thing I have used since I discovered it all those years ago!!
    November 14, 2019
    I absolutely LOOOOVE biosilk.. I don’t think I could live without it. I paid 56$ per bottle of shampoo and conditioner of pureology and biosilk is by far in the lead, and more affordable :)
    July 17, 2019
    I will probably use this product for the rest of my life. I am blown away by how soft my hair is after one little squirt of this stuff. A little definitely goes a long way, and I am just too happy with this find.
    February 7, 2019
    Amazing! I have been using Biosilk original therapy religiously for 9 years, I was able to buy it at my local stores, but then they quit carrying it. I then tried buying it on Amazon twice for $21 and it was thick and greasy ... I guess the saying you get what you pay for is true. Finally out of desperation ( my skin and hair felt dry) I googled and found the Biosilk website. Yes it is more costly than other places but Wow It is Amazing! I got this yesterday and I already notice a difference using it after my shower last night. I will Never go without the good stuff again. It can literally shave 10 year off your age if you use it everyday. I put a light layer on my face and neck in the morning and before bed. It is not great and does not cause breakouts.
    Travis Porter
    August 10, 2018
    This stuff has been my go to since growing my hair out. I have used BioSilk for about three years now and haven’t found a product that even compares to this. As a guy with long hair it does exactly what I want it to, it keeps my hair from getting all tangled and keeps it looking healthy and manageable.
    Shanette Bergener
    August 10, 2018
    I'm a hairdresser and have recommended this to my clients for almost 20 years! Even cheaper than the beauty supply. I definitely can tell who used this and who doesn't. It not only treats but prevents breakage. It's best to use a small amount on the mid-shaft to the ends of hair. I always use this on a color before I do blonde typo prevent damage from coloring. I love this product!!!
    Sterre Horninge
    May 16, 2018
    Is this product vegan?
    Reply from David Vargas:
    We do not involve animals in our research, development, testing, manufacturing, or sale of our products except for use of certain animal by-products such as Silk and Sheep’s Wool Proteins. In short, we are cruelty free, our products are not tested on animals.
    Denise Grazioso
    March 29, 2018
    Is it safe to use Bio Silk Silk Therapy on dog's fur?
    Reply from alex:
    Salve, una domanda! È possibile conoscere gli ingredienti di questo olio? Grazie in anticipo
    Reply from Manolis Kariniotakis:
    So If I use it for my Maltese it will be ok. cause we don't have bio silk for dogs here.. I only can find bio silk therapy original.. my Maltese has dry coat and I want to hydrate it a little and make it more silky
    Reply from David Vargas:
    We have Biosilk for dogs & CHI for Dogs line - the products are similar to humans. On most dogs, there are no adverse reactions. I do not recommend human shampoos and conditioners due to its different pH levels. Other products are normally fine. Please let us know if you have any further questions Thanks
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