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hårvekst Hair Density Serum | 30ml

with PROVITAMIN B5 & CAFFEINE
£13.00 — available on subscription from £11.00 every month
4.5 Rated 4.5 out of 5 230 Reviews
Lightweight, leave-in serum. Enriched with targeted ingredients formulated to support the scalp, leaving you with thicker, denser, fuller, and healthier-looking hair.  

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Good to know:

Made in the UK
All hair types
Prevents hair loss
Alcohol free
Vegan friendly
Cruelty free
Phthalate free
Planet friendly
Travel friendly
Recyclable
  • 5% Provitamin B5. Penetrates the hair cuticle, then draws moisture into the hair shaft, causing each strand to swell. This results in thicker looking hair. But it’s not just aesthetic – hair follicles are strengthened overall, preventing breakage and split ends in the long term.
  • Caffeine. Helps to sustain healthy growth by naturally targeting and reducing the effects of a hormone known as ‘DHT’ which can lead to hair loss by inhibiting the uptake of vitamins, minerals and proteins that help the hair follicles to grow.
  • Rosemary Oil. Anti-inflammatory properties, blood circulation stimulation, and nerve cell growth promotion all contribute to encouraging healthy follicle growth, while itchy scalps are soothed, and premature greying may even be delayed.
  • Peppermint Oil. A natural cooling agent, peppermint oil works to reduce scalp inflammation and relieve irritation, all while acting as a natural moisturiser. It also improves blood circulation, which in turn encourages healthy follicle growth.
  • Avocado Oil. Rich in nourishing fatty acids, minerals and vitamins A, C, D and E that stimulate healthy cell production, replenish lost lipids and restore elasticity. Antimicrobial, antioxidant and anti-inflammatory, it’s also the perfect antidote to irritated, sensitive scalps.
  • Green Tea. Thanks to high levels of catechins, this strong antioxidant is thought to reduce UV-induced oxidative stress, encouraging cell regeneration, elasticity and healthy growth.
  • Sunflower Seed Oil. Vitamins A, D and E make this an excellent repairing agent with calming, nourishing and antibacterial properties. Provides a velvety texture.
  1. To either damp or dry hair, add a few drops onto the scalp and hairline.
  2. Massage into the skin using your fingertips.
  3. Do not wash hair for at least six hours.
  4. A tingling sensation will gradually develop where applied.
  5. For best results use daily.

Aqua , Glycerin , Panthenol, Sodium Benzoate, Mentha Arvensis (Peppermint) Leaf Oil, Sodium Hyaluronate, Betaine, Citric Acid, Rosmarinus Officinalis (Rosemary) Leaf Oil , Xanthan Gum, Polysorbate 20, Tocopherol, Helianthus Annuus (Sunflower) Seed Oil, Caffeine , Persea Gratissima (Avocado) Oil, Aloe Barbadensis Leaf Juice , Camellia Sinensis (Green Tea) Leaf Extract.

I love this product. My hair was thinning at the sides when I tied it back. It looks so much thicker now. I use this product every day! I love Gruum products in general too.
16th October 2026
Just ordered my second bottle. Hair growth wise I don’t think I’ve been using it long enough to tell because I only had a 30ml bottle that I went through quickly but I have mild scalp psoriasis and really struggle with an itchy sore scalp this stuff is incredible it helps soothe and stop the itching I got my first bottle in a beauty box off TikTok shop and now I’ve just gone for the 100ml it’s light weight doesn’t make my hair greasy at all and I can use it daily without issues 10/10 product I highly recommend I also have bleached and coloured hair and using this does not disrupt my colour
29th September 2026
Very impressed with this product,have used a couple of bottles now and noticed an improvement with my hair . I use it mostly around the hairline . Also love the minty fragrance .
16th September 2026

Superstar ingredients

Our products make the most of natural ingredients, including…

Provitamin B5

Close-up of oil and water bubbles.

Penetrates the hair cuticle, drawing moisture into the shaft, making hair look thicker while strengthening follicles and preventing breakage.

Caffeine

Close-up of coffee beans.

Targets and reduces DHT, a hormone linked to hair loss, by inhibiting nutrient uptake that helps hair follicles grow.

Rosemary Oil

Close-up of rosemary plant

Stimulates blood circulation and nerve cell growth, promoting healthy follicles, soothing itchy scalps, and potentially delaying premature greying.

Peppermint Oil

Close-up of green leaves

Reduces scalp inflammation, relieves irritation, and boosts circulation, encouraging healthy follicle growth while moisturising.

Avocado Oil

Sliced avocado among whole avocados

Rich in fatty acids, vitamins A, C, D, and E, it stimulates cell production, replenishes lipids, and soothes sensitive scalps with its antimicrobial, antioxidant, and anti-inflammatory properties.

Green Tea

Green leaves with water droplets

Packed with catechins, it reduces UV stress, boosts cell regeneration, and supports healthy hair growth.

Sunflower Seed Oil

Pile of sunflower seeds

Rich in vitamins A, D, and E, it repairs, nourishes, and provides a velvety texture with calming and antibacterial benefits.

Don’t just take our word for it…

4.5 Rated 4.5 out of 5 Based on 230 reviews Write Review
Hair density serum bottle with dropper.

hårvekst Hair Density Serum | 30ml

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