Keratin Enhance | GNC

ResVitále™ Keratin Enhance


Item # 446721


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Size: 60 Capsules

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Product Information


Keratin Enhance with Biotin and Resveratrol presents the latest advancement in beauty supplements.* Incorporating Cynatine® HNS Keratin, a patented form of keratin that is easily absorbed by the body, this formula offers optimal nourishment and repair for youthful hair, nails and skin.* Keratin Enhance with Biotin and Resveratrol helps reduce fine lines and wrinkles, decreases hair loss and promotes healthy, strong nails.* Satisfy your body with this essential support for age-defying beauty.*

THE ART ResVitále introduces the world’s first Solubilized Keratin – a recent breakthrough in beauty supplementation.* Cynatine® HNS Keratin is manufactured using a patented process that makes it both bioactive and bioavailable.*

  • Patented, absorbable form of keratin*
  • Reduces fine lines and wrinkles*
  • Supports thicker, fuller hair*
  • Promotes stronger, nourished nails*
THE PROOF Studies have shown that Cynatine® HNS reduced hair loss from washing by 30% over 90 days.

Label (click image to enlarge)


As a dietary supplement, take 2 capsules daily with meals or as directed by your health care practitioner. For best results, take for a minimum of 90 days.


Keep out of reach of children.
, DO NOT USE IF OUTER SEAL IS BROKEN OR MISSING., As with any dietary supplement, consult your health care practitioner before using this product, especially if you are pregnant, nursing, have existing medical conditions or are taking prescription medications.

Other Ingredients

Vegetarian capsule (vegetable cellulose), Rice bran , Silica


Store tightly closed in a cool, dry place.
MANUFACTURED FOR RESVITÁLE 701 S. Howard Ave., Suite 106-310 Tampa, FL 33606

Nutrition Facts

Serving Size  2 Vegetarian Capsule(s)
Servings Per Container  30

Amount Per Serving     % DV

Biotin 3000mcg   1000%

Cynatine® HNS (Solubilized Keratin)  500 mg   **
Organic French Red Wine Polyphenol Extract  40 mg   **
Quercetin Dihydrate  20 mg   **

** Daily Value (DV) not established.


4.6 / 5.0
31 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Amazing growth
My hair is growing so strong and quickly. I have already noticed that more of my hair reaches my ponytail and my ponytail is longer, in only 1 month. It is amazing how strong and shiny my hair is as well. I am going to purchase more for myself and my envious husband (he’s growing his hair out for his Halloween costume)!
March 19, 2018
3 weeks ago
Love it!
I love it its amazing!
February 24, 2018
9 months ago
Noticed nail growth
Not at all worth the price. Saw no increased growth with my hair. But i did however, notice my nails grew longer than normal. You might as well just take a whole bunch of Biotin daily.
January 9, 2018
Short term use, but good results
I started using this a 2-3 weeks ago so I haven't used it long, but I have noticed a few small differences. I have almost always had fairly weak, brittle nails that just about always have breaks or chips in them. Since staring this, my nails have starting growing faster so I have been able to file out the breaks before they can run up higher. About a week ago my nail was bent backwards and broke about 1/3 of the way from my cuticle to the end of my nail and has already grown out! I haven't noticed much with my hair other than it feeling better, but I will try to update when I do.
August 13, 2017
8 months ago
It's really awesome!!
I didn't think it would work so fast but within a couple of weeks I could FEEL my nails getting stronger... now I can wash my hair with breaking a nail!!!
August 3, 2017
8 months ago
I love this stuff!! My nails are looking soo good and strong after and my hair too!! So worth it
July 26, 2017
8 months ago
Makes my hair healthy and shiny. Tried other products because of the price, but I keep going back - others are not as good.
July 22, 2017
8 months ago
Great Product
I've been using this for about a month and has already seen a difference in my nails and hair. You have to be committed to it for three months and Im ordering my second bottle today! I will keep you updated!
June 24, 2017
Been on it thirty days as of now, have seen some new growth. Hope to continue
May 31, 2017
10 months ago
Medication I am on caused significant hair loss, but this has greatly slowed that down to where a just lose a few strands when washing my hair. I stopped it for a while and the hair started falling out again in bunches. Went back on this and the hair loss slowed again. Definitely helps.
December 29, 2016
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Browse 8 questions Browse 8 questions and 8 answers
Why did you choose this?
GNC Store
There is a very good effect
5 3 on Apr 8, 2015
There is a very good effect
5 3 on Apr 8, 2015
Can I take this and also my ultra mega over 50 multivitamin?
Anderson J on Feb 23, 2018
Does it help with hair loss?
Armie on Feb 23, 2018
BEST ANSWER: I had been taking another vitamin that actually was causing hair loss on me. I then switched to the Keratin Enhance and my hair loss slowed back to normal (less that 50 per day). I had actually started taking this to help with thin, splitting, peeling, brittle nails and it worked very well for that also.
Is this product vegan?
A shopper on Aug 2, 2011
BEST ANSWER: It doesn't have actual sheep's wool in it, sheep's wool is where premium amino proteins of keratin are found, so they extract the amino protein from the wool, hydrolize it so the body can use it for hair, nails and skin right away. No sheeps are harmed in the process!
What are the side effects of this product? I start using this product and my period delayed, i feel pain in my toes so i stopped using the vitamins and all come back to normal. The vitamins can produce all of this?
A shopper on Jun 17, 2012
BEST ANSWER: None of those side effects are listed on the label, but if they are impacting you adversely, you should discontinue their use and consult your doctor.
do this product make your hair fall out.
A shopper on Apr 27, 2011
BEST ANSWER: No this product will, in fact, do the exact opposite! A clinical study demonstrated that hair loss from washing was reduced by 30% over a 90-day period, and hair strength was improved by 12% with a marked improvement in the shine and brightness of hair.
does this product make your hair grow longer .??
A shopper on Nov 3, 2013
BEST ANSWER: Keratin is said to promote hair growth, this may or may not work for you as everyone processes supplements differently.
Is this supplement similar to the ResVitále™ Collagen Enhance supplement. I already take the Collagen Enhance supplement but I just saw this Keratin one. What is the main the difference and is one better than the other or are they two seperate things. When I read the summaries, they both sound exxtremely similar except this one addresses hair and nails in addition to skin. Or are they different products altogether. I am looking for a product to keep my skin looking healthful and free of lines but I would also like a product to help with my nails and hair. thank you for your time!
A shopper on Feb 17, 2012
BEST ANSWER: No, this item is different than the Collagen Enhance supplement. This item specifically supports nail and hair growth, not healthy skin.
Can I take this with a multivitamin?
A shopper on Nov 24, 2016
BEST ANSWER: I take drink this with all my vitamins. No side effects yet. But, probably should consult your physician.