• Boldify Hair Thickening Serum Bottle with 4oz or 118ml and packaging box.
  • Woman drying her hair next to Hair Thickening Serum Bottle and message of Instantly Thickens and Adds Full, Healthy-Looking Volume
  • Boldify Hair Thickening Serum Bottle next to a happy woman showing thick and healthy-looking hair and message of Revolutionary 3 in 1 Formula
  • Boldify Hair Thickening Serum Bottle next to a happy man showing well-treated and healthy-looking hair.
  • Woman showing her healthy-looking hair next to Boldify Hair Thickening Serum Bottle and many stamps of made in the USA, 100% animal cruelty-free, no dangerous chemicals and safe for colored treated hair.
  • Boldify Hair Thickening Serum Bottle with Biotin and Pro Vitamins B5.
  • Senior Woman showing her healthy-looking hair next to Boldify Hair Thickening Serum Bottle and a stamp of satisfaction guarantee.
  • Boldify Hair Thickening Serum Bottle with 4oz or 118ml.
1 8

Hair Thickening Serum - Thicker Hair From First Application

4.8
Rated 4.8 stars
3,069 Reviews

$39.99 NZD
$39.99 NZD
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Get big, bouncy volume and healthy, glossy shine with the BEST Biotin hair serum for fine and thick hair! Our natural, non-greasy hair nourishment and volumizer complex is packed with Biotin for stronger, longer strands.

This natural hair thickener absorbs into and seals follicles, nourishing from the inside out for instant body and shine. Achieve the perfect blowout, fight hair fall, and banish breakage with Boldify Hair Thickening Serum for women & men!

Tired of hair loss, breakage, or snail-slow growth?
Our hair boost provides vital nutrients for a cleaner scalp & happier follicles, enhancing strand retention & inhibiting breakage. With each use Boldify nourishes, plumps, and strengthens hair, working to reverse existing damage and prevent future damage for thicker, longer, stronger, shinier locks. And with such a light feel and fresh scent, you'll look forward to using it after every wash!

Perfect salon-quality blowouts in just 3 easy steps!
1. Squeeze a dime-sized amount of serum into your palm (more for longer hair), and rub hands together;
2. Apply evenly through clean, towel-dried hair, starting at the ends and working toward roots, avoiding the scalp.
3. Style as usual by allowing hair to air dry for soft, natural fullness, or blow-dry for 3X more volume! Either way, our leave-in conditioner plumps and nourishes strands for a phenomenally full, beautifully silky finish.

Triple-action formula for a light, effortlessly voluminous finish: Unlike other hair retention oils/serums and multi-product hair care treatments, Boldify's Biotin Hair Serum weightlessly acts as 3 products in one - hair boost serum, leave-in conditioner, and plumping volumizer - to give you that "fresh from the salon" blowout look and feel - without damaging buildup and greasy, sticky residues that leave locks limp and lifeless. This perfect Biotin hair oil alternative works for all hair types and is safe for color-treated hair.

Premium results guaranteed: Over 250,000 happy, beautiful customers have already transformed their tresses with Boldify. We're so confident that you'll love our products too that we want you to try them out 100% risk-free!

We guarantee that Boldify Volumizing Hair Serum will promote gorgeous, lustrously shiny, thicker, longer, stronger hair - or we will refund you the purchase price upon request. No questions asked, no return required!

  • FREE SHIPPING NZ WIDE!

    We offer fast and free shipping (with NZ Post) to all New Zealand addresses in both the North and South Islands

  • NZ OWNED AND OPERATED

    BOLDIFY is proudly a New Zealand owned and operated company.  We sell in the United States, Canada, Europe, and right here at home.

  • 100% MONEY BACK GUARANTEE

     You have 30 full days to let us know if you aren't totally satisfied, and we will happily refund you in full. No questions asked.

  • 100% CRUELTY-FREE

    We are a cruelty-free company, and all of our products have NEVER been tested on Animals.
4.8
Rated 4.8 stars
Based on 3,069 reviews
Total 5 star reviews: 2.5k Total 4 star reviews: 542 Total 3 star reviews: 4 Total 2 star reviews: 1 Total 1 star reviews: 0
100%would recommend this product
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3,069 reviews
  • HH
    Hande H.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    Yesterday
    I liked it!

    Meets my expectations

    Was this helpful?
  • MB
    Margaret B.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    2 days ago
    It works!

    I love the extra texture that adds a thicker feel and look to my hair. It lasts till the next wash

    Was this helpful?
  • TH
    Tammy H.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    3 days ago
    AWESOME PRODUCT/ THE BEST

    I LOVE EVERYTHING ABOUT THIS PRODUCT! IT THICKENS MY HAIR SO MUCH, MAKES IT SILKY SOFT AND HELPS WITH HAIR GROWTH. IT IS EVERYTHING ALL IN ONE AWESOME PRODUCT! I AM A FOREVER CUSTOMER

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  • SC
    Sherry C.
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 5 stars
    1 week ago
    Boldify Thickening Serum

    Love all the Boldify products, especially when used together. I don't have to weigh my hair down with mouse to get thickness or body. I just use the Boldify thickening serum when wet, dry to dampness, then spray with the thickening spray. My hair is not only volumized for days, but shiny too! Can't wait to try the volumizing shampoo trial sample that will be sent soon. I've been impressed with their products so far - keeping me from getting a hair frying perm.

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  • FM
    Frances M.
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 5 stars
    1 week ago
    Thick hair

    I loved the quick drying & sheer volume it created

    Was this helpful?
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