This New Thickening Shampoo Makes It Look Like I’m Wearing Extensions—& I Have an Exclusive Discount Code
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Take one look at my long hair, and you'd probably be surprised to learn that it's actually quite fine—I just happen to have a lot of it. Because of the length and fine texture, my hair often lacks volume and is quickly weighed down shortly after styling. While dry shampoo and texture sprays can help add some oomph to my roots, the extra products always make my hair feel greasy after one day, which is not ideal when you have a longer hairstyle and don't want to wash your hair more than once or twice a week. Through a lot of trial and error, I've learned that, if I want to forgo the styling sprays, I need to choose a thickening and volumizing shampoo to achieve some lift.
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I've tried a ton of thickening shampoos , and I'm always surprised by how different they can be—choosing just any shampoo that can create that illusion of voluminous hair isn't it. Instead, I look specifically at the formulas for ingredients that optimize body, texture, and volume, and deliver the long-term results I want (because, let's be honest, I am not trying to add more wash days to my hair routine). Enter: Zenagen's ZENERGY Thickening + Volumizing Shampoo (now 20% off!) a new scalp-focused daily performance shampoo designed to give you the body that you can't achieve with a blow dryer and volumizing spray alone.
Zenagen ZENERGY Thickening + Volumizing Shampoo
On Sale 20% off
Zenagen Promo Code:STYLECASTER20 for 20% off site-wide
Developed by molecular biologist and biochemist Jared Reynolds, this thickening and volumizing shampoo is powered by Microfoam Technology—an advanced four-surfactant cleansing system engineered to create a finer, more controlled lather that helps lift buildup and excess oil without stripping the hair or scalp.
ZENERGY is also formulated with a Liposomal Encapsulated Caffeine + Biotin Complex designed to support scalp health and optimize ingredient delivery, helping caffeine and biotin perform at their full potential while promoting weightless body, healthy texture, and lightweight volume. The result is a deep, effective cleanse that respects the scalp's natural oils—especially important for those with dry skin—creating a more balanced environment where hair can thrive from roots to ends.
This thickening and volumizing shampoo is formulated with a Liposomal Encapsulated Caffeine + Biotin complex that supports scalp health and optimizes ingredient delivery so that the caffeine and biotin perform at their full potential, while supporting weightless body, healthy texture, and lightweight volume. It also provides the hair with a deep clean that doesn't strip the scalp of natural and vital oils—especially if, like me, you also have dry skin—for a more balanced environment that can help hair thrive, roots to ends.
In addition to the Liposomal Encapsulated Caffeine + Biotin, this shampoo also features a blend of potent botanicals through advanced CO2 extraction such as green tea, rosemary, pumpkin seed, and saw palmetto to support fuller-looking hair. It's also enriched with a a strengthening blend of amino acids that reinforce the hair fiber, improve softness and support healthier-looking strands that are easier to manage (phew—I need that!).
In third-party instrumental testing, ZENERGY was shown to increase volume by 121% after a single use and maintain 114% increase after just eight hours. It was also shown to reduce hair breakage by 70% and reduce combing friction on damaged hair by 48% while also helping control frizz for up to 24 hours in high humidity conditions – reinforcing ZENERGY's position as a true performance shampoo, not just a cleansing step.
If you want to try it out for yourself, StyleCaster readers get 20% off site-wide with promo code STYLECASTER20at checkout.
Size:12 oz.
Key Ingredients:Liposomal Encapsulated Caffeine + Biotin, green tea, rosemary, pumpkin seed, saw palmetto, amino acid complex
Scent:Bergamot, fresh citrus, green tea (top notes); rosemary, soft botanicals, clean herbal accord (middle notes); amber musk, woody violet, clean woods (bottom notes)
Zenagen ZENERGY Thickening + Volumizing Shampoo Review
Before trying the ZENERGY Thickening + Volumizing Shampoo
The ZENERGY Thickening + Volumizing Shampoo is unlike any other daily shampoo I've tried before. It feels as cleansing as a purifying shampoo, but without that dry scalp sensation and straw-like strands. When I first read the fragrance notes, I thought it'd have a stronger scent, but it's actually lighter and fresher-smelling, which my sensitive nose appreciates. After applying it to my strands and working it into my scalp, I noticed that my hair texture felt smoother and more hydrated, similar to when I've applied gloss treatments to my hair, so I was excited to see what it looked like once dried and styled. For an added dose of moisture, I followed up with the Revolve Conditioner .
After trying the ZENERGY Thickening + Volumizing Shampoo
When I got out of the shower and towel-dried my hair, I noticed it was much easier to brush through compared to when I used other shampoo formulas. I let my hair air-dry, and then once it was just barely damp, I ran my Dyson AirWrap through it per usual and was so impressed by the results. My hair had tons more volume, but wasn't frizzy or fluffy—something I've begun to struggle with since entering my mid-30s.
More Best Thickening Hair Products to Try
In addition to the ZENERGY Thickening + Volumizing Shampoo , the brand makes additional thickening hair products that make fine hair look more dense with a ton of extra body.
Zenagen REVOLVE Trio Kit
The Zenagen REVOLVE Trio Kit includes an entire haircare routine dedicated to fuller-looking hair, including shampoo and conditioner formulas that give fine an visibly thinning hair a thicker, more voluminous style. The trio also includes the brands' Densifying Hair Serum, which acts as a targeted scalp treatment for problem areas. This best-selling trio doesn't just make hair look thicker temporarily, it works overtime to promote growth. After six weeks of use, hair feels softer and more manageable, with hair looking thicker at around the three-month mark. In six months, the scalp is more balanced while density continues to improve, and you'll see optimized results within a year of regular use.
If you want to try it out for yourself, StyleCaster readers get 20% off site-wide with promo code STYLECASTER20at checkout.
What's Included:Revolve Shampoo, Revolve Conditioner, Densifying Hair Serum
Size:6.75 oz. (shampoo and conditioner), 1.7 oz. (hair serum)
The REVOLVE Shampoo and Conditioner duo and Densifying Hair Serum are also available for purchase separately. You can also purchase the shampoo and conditioner as a duo .
Zenagen EVOLVE Shampoo & Conditioner Duo
For dull, dry, or damaged hair types (or all of the above), consider adding the Zenagen EVOLVE Shampoo & Conditioner Duo into your routine. This duo focuses on delivering lightweight hydration—so it won't weight down fine or thinning hair—and improving the overall manageability of hair for your healthiest 'do yet. They're enriched with ingredients such as aloe vera for its moisture properties, green tea for its antioxidants, and alpine willow to strengthen strands and balance the scalp.
What's Included:EVOLVE Shampoo, EVOLVE Conditioner
Size:6.75 oz.
The EVOLVE Shampoo and Conditioner are also available for purchase separately.
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The StyleCaster shopping team is dedicated to finding the best products, brands, services, sales, and deals across fashion, beauty, lifestyle, and entertainment. We make sure to stay on top of the latest trends, too. From knowing a brand's offerings like the back of our hands to updating prices to hunting down discount codes and hacks to identifying alternatives, we do a thorough job at suggesting products that deserve your attention and money. Additionally, our commerce writers and editors have previously covered a vast array of fine hair products, including hacks for making fine hair look bouncy .
This story's author, StyleCaster contributing writer Jessie Quinn , has naturally fine hair and has spent years finding the best products that work for her 'do—she's even tried onion shampoo . For this story, Jessie tested the ZENERGY Thickening + Volumizing Shampoo IRL to see how well it worked with her long, fine locks. She didn't apply any additional styling products to her hair when blowing it out to get a good idea of how well it works. Upon testing, she shared her insights in this review.
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