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Top Rated

Densifying Hair Serum

Regular price  $55.00
Sale price  $55.00 Regular price 

Clinically-proven to support visibly thicker, denser-looking hair*, this lightweight, water-based serum targets areas prone to thinning. Powered by CO2-extracted botanicals, it absorbs quickly without residue while helping balance the scalp for fuller-looking hair over time.

Size: 30ml
Benefits
  • Clinically-proven to support fuller, healthier-looking hair*
  • Clinically-proven to be safe for sensitive skin
  • Helps improve overall scalp health with daily use
  • Lightweight, residue-free formula
  • Safe for all hair types and color-treated hair

*In a 4 month clinical study, 30 female participants with early to moderate thinning hair used Zenagen Densifying Hair Serum twice-daily. 

How to Use

Fill dropper and apply directly to the scalp, focusing on areas of concern and the hair part. Massage into the scalp. Use on dry or towel-dried hair once per day, morning or night. Do not rinse. Apply daily for visible results. Apply twice daily for enhanced results.

Best For
  • Visible shedding across the scalp 
  • Noticeable reduction in hair density 
  • Targeting areas of concern (temples and crown)
  • Fostering an optimal scalp environment 
Ingredients

Water (Aqua), Aloe Barbadensis Leaf Juice, Glycerin, Cucurbita Pepo (Pumpkin) Seed Oil, Caffeine, Serenoa Serrulata Fruit Extract, Trifolium Pratense Flower Extract, Camellia Sinensis Leaf Extract, Chondrus Crispus (Carrageenan) Extract, Pisum Sativum (Pea) Sprout Extract, Vitis Vinifera Seed Extract, Hedychium Coronarium Root Extract, Euterpe Oleracea Fruit Extract, Vitis Vinifera Extract, Salvia Officinalis Leaf Extract, Equisetum Arvense Extract, Dracaena Marginata Leaf/Stem Extract, Polysorbate 20, Isomalt, Xanthan Gum, Fragrance, Gluconolactone, Sodium Benzoate, Potassium Sorbate.

Best used with
Densifying Hair Serum

Densifying Hair Serum

Regular price  From $55.00
Sale price  From $55.00 Regular price 
30ml

Formulated with Powerful Natural Ingredients

Clean, plant-powered formulas designed to strengthen, protect, and transform the look and feel of your hair.

Green Tea Leaves

A source of natural antioxidants that help soothe the scalp and support a balanced environment for healthy-looking hair.

Saw Palmetto

A plant-derived extract known for its role in supporting hair density. Commonly used to maintain a healthy hair growth cycle.

Pumpkin Seed Extract

A nutrient-rich botanical known to support a balanced scalp and help hair appear stronger, fuller, and more resilient.

Frequently Asked Questions

When will I see results?

Hair and scalp improvements happen gradually. Many users notice a healthier look and improved feel within 4–8 weeks, with fuller-looking density developing with consistent daily use. Individual results may vary.

Will the serum make my hair greasy or weigh it down?

No. This is a lightweight, leave-in serum that absorbs quickly without leaving a heavy residue when used as directed.

Is it safe for colour-treated, keratin-treated, or chemically processed hair?

Yes. This serum is gentle on treated hair and won’t strip colour or interfere with professional treatments.

  • 5 stars: 451 (73%)
  • 4 stars: 115 (19%)
  • 3 stars: 53 (9%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
M
Michael McCormick

Very nice product. I have male pattern baldness so I use this serum twice daily. It would be cheaper for me if the 100ml bottle was sold in NZ.

L
Lori K.
I love the smell! I

I love the smell! I haven’t seen drastic changes yet but it’s only been a month.

J
Julie G.
I love the smell and

I love the smell and lightness of the serum.
I believe that it is filling in my thinned areas because there is regrowth!
I use it once or twice a day and it makes my hair fluffy and manageable.

T
Tara M.
Too soon to tell if

Too soon to tell if I am seeing any differences, but I am really enjoying the conditioner. I just ordered the volume foam, so hoping I will have more to report in terms of progress, in a few months.

D
Denise M.
Seems good. Just started a

Seems good. Just started a month ago. Has helped with my scalping too

C
Christi R.
So much new growth!!!

So much new growth!!!

C
Carolyn K.
I love that the product

I love that the product isn’t oily and works!!

B
Brigitte Q.
Excellent

Excellent

E
Emily F.
The serum is awesome!! My

The serum is awesome!! My hair is really thickening up.

J
Janie B.
Good products

Good products

D
Debra H.
I have used for only

I have used for only a few weeks. I have not yet seen hair growth. I do like the serum. It is clean, not greasy or sticky. I hope to see new growth soon!

F
Frances U.
Makes my hair seem fuller

Makes my hair seem fuller

J
Jackie M.
I am seeing results!! It's

I am seeing results!! It's been a few months and my hair is growing back.

S
SUE W.
love love love

Love this product . Was recommended by my Hair Stylist. Not greasy. . Easy to use with the curved dropper . . My hair is thinning in spots so I have been using over a month and have new little hairs have been starting to fill in. . I use every night before bed and so easy . . .

M
Miranda F.
I use this every day!

I use this every day! Love it.

J
June T.
Works like a charm

Works like a charm

E
Emily P.
This product is amazing and

This product is amazing and so easy to use. Does not make your hair greasy either.

L
Linda M.
It helped me a little

It helped me a little bit. Have been using it on my husband lately but haven't seen much improvements.

E
Elizabeth R.
This product is very very

This product is very very helpful for thinning hair. It adds volume.

D
Doreen E.
New hair growth a lot!!

New hair growth a lot!!

D
Donna Z.
Although I need to use

Although I need to use it daily and best twice a day it does help but no miracles as far as thick hair griwth

M
Mary W.
Try it!

I love this serum! Really helped my hair grow within a month or two. I still use it every day.

J
Justin S.
I feel this serum definitely

I feel this serum definitely has started hair growth, especially at the peaks of my temple where my hair line is reseeding. It never causes irritation as well.

D
Donna K.
Adding this to the shampoo/conditioner

Adding this to the shampoo/conditioner routine really enhanced my area of thinning/split in hairline. I could see the difference in a very short time! Definitely adding this to my shampoo/condioner routine!!

J
Jessica O.
Awesome

Great product.

L
Linda c.
Your head is alive again

This is a amazing my daughter an I both use this an it makes your hair healthier an fuller an hair does come back in the ingredients get all the roots alive again an it keeps your head hydrated an breathable to grow

L
Lindsay L.
One wash and I already

One wash and I already saw regrowth. You have to be consistency with the product. The ingredients in them smell so good

J
Jonathan K.
Disappointed

I was a bit disappointed after purchasing the products. My hair is thick but just started shedding and did my research and asked my friends at the salon that the results aren’t permanent and as soon as you stop using the products it basically goes back to before. I’ve noticed my hair even shedding more since I’ve starting using the shampoos and Serum.

M
Marc S.
I have been using the

I have been using the products for about 6 months and seeing a very strong change for the positive in my hair thickness as well as growth .

C
CYNTHIA B.
Works great!

Works great!

I
Ivanka D.
Great product

Great product

D
Donna M.
Ah, I look like I have hair!

For the first time in my life, my hair is easy to manage! In addition to growing back some hair that I last summer due to illness, Zenegan shampoo & conditioner gives my hair volume, the Densifying Hair Serum ads more volume and styling control. I have had fine, thin, hair all my life. My gray is also very fine. I have never found any mouse, styling gel, etc that would do more than weigh my hair down…this DOES NOT. YAY!

S
Salvador
So glad I found this product

My scalp and hair feel the best it has in a long time. And my hair is growing back thicker with more volume. The Midwest winter can’t even bring it down.

K
Kim C.
My hair is actually REGROWING!

I love this product! I’ve tried other serums, but all have left residue or weird texture. This has the consistency of water, so I’m happy to use it daily around my face and down the center part where it’s been thinning the most. My stylist commented on the regrowth she’s noticed around my face! :heart:️:heart:️. I didn’t expect to see new growth. I was just hoping it would stop the shedding! It’s done both wonderfully. I highly recommend you use this product in conjunction with the regrowth shampoo!!!

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