These Are The 11 Best Hair Thickening Serums To Try In 2024

Enjoy a head full of thick, voluminous hair as you channel your inner Disney princess

Reviewed by Vanessa Thomas, Cosmetic Chemist Vanessa Thomas Vanessa ThomasCosmetic Chemist linkedin_iconinsta_icon
Written by , MA, Certified Skin Care Coach Oyendrila Kanjilal MA, Certified Skin Care Coach linkedin_icon Experience: 2 years
Edited by , MA (English Literature), Certified Skin Care Coach Shiboli Chakraborti MA (English Literature), Certified Skin Care Coach linkedin_icon Experience: 4 years
Fact-checked by , BA, MSc Eshna Das BA, MSc linkedin_icon Experience: 3 years
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Not everyone is blessed with thick, dense, and healthy-looking hair. There are many reasons you may have fine, sparse and flat hair, but do not worry. Hair thickening serums can help you. These serums work in two ways – some of them penetrate and plump the hair strands to make fine hair appear thick and full, and some promote hair growth. You can choose either one, depending on your needs. This article lists the 11 best hair thickening serums that can volumize your hair. Scroll down to check them out.

Top PicksCheck Price
Best Sulfate-Free: Best Overall:divi Scalp SerumPrice on Amazon
Best Gluten-Free: Best For Flake Prevention:Eufora Thickening SerumPrice on Amazon
Best For All Hair Types: Best For All Hair Types:Hair Restoration Laboratories Maximum Hair Thickening SerumPrice on Amazon
Best Vegan:Lanmeri Hair Growth SerumPrice on Amazon
Best Non-Greasy:iRestore Anti-Hair Loss SerumPrice on Amazon
Best Drug-Free: Best Drug-Free Option:Good Lab Blooming & Thickening SerumPrice on Amazon
Best Handcrafted: Best For Strength And Elasticity:AG Hair Care Root Thikkening SerumPrice on Amazon
Best Paraben-Free: Best Color-safe Formula:Tela Beauty Organics Hair Thickening serumPrice on Amazon
Best For Hair Growth:Nutrafol Hair Growth ActivatorPrice on Amazon
Best Sulfate-Free: BOLDIFY Hair Thickening SerumPrice on Amazon

11 Best Hair Thickening Serums – Reviews

1. Best Overall: divi Scalp Serum

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4.2

The Divi Scalp Serum is the perfect solution for thinning hair! This powerful blend of multiple amino acids and peptides is designed to detoxify follicle buildup, support thicker hair growth, and encourage overall scalp health. Natural ingredients in it such as rosemary leaf extract increase circulation in the scalp to provide fuller locks. It also contains copper tripeptide-1 that has hair-lengthening properties. All in all, you can trust this scientifically proven formula to help improve your hair’s overall appearance. Additionally, the brand also does not support any form of efficacy test involving animals, which makes this dryer an ideal option for ethically conscious hair care enthusiasts.

Product Dimensions: 3 x 1.5 x 5 inches | Weight: 5.93 Ounces.

Key Ingredients: Copper Tripeptide-1, Rosemary leaf extract, and Caffeine.

Pros
  • Lightweight
  • Value for money
  • Non-sticky
  • Absorbs quickly
  • Instant results
  • Cruelty-free

Cons

None

protip_icon Pro Tip
Pair this product with Toppik Hair Building Fibers for added thickness. While you can apply the fattener to wet or dry hair, the building fiber is a finishing product, and hence, make sure your hair is completely dry before using it.

2. Best Gluten-Free: Best For Flake Prevention:Eufora Thickening Serum

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4.3

The Eufora Thickening Serum promotes hair growth. It is formulated with a ProAmino Cell Complex that includes butyl avocadate, an antioxidant that regulates 5-alpha reductase and sebum production. It also contains neem seed oil to reduce scalp dryness and irritation. Other than that, the complex has peppermint and citrus oil that promote oxygen flow to the scalp and licorice root extract to prevent flakiness and give you an improved hair texture. If you still need a tad bit more convincing, check out the product on Amazon and witness numerous positive reviews and customer testimonials.

Recommended For: Fine, Thin or thinning hair | Product Dimensions: 4 x 4 x 6 inches | Weight: 5 Ounces

Key Ingredients: ProAmino Cell Complex

Pros
  • Gluten-free
  • Mineral oil-free
  • Paraben-free
  • Petrolatum-free
  • Vegan

Cons

None

3. Best For All Hair Types:Hair Restoration Laboratories Maximum Hair Thickening Serum

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3.7
Maximum Hair Thickening Serum Image: Maximum Hair

The Maximum Hair Thickening Serum by Hair Restoration Laboratories is clinically tested by trichologists and promotes hair growth. It is developed with DHT Halting Technology, a blend of proprietary extracts, and contains a high percentage of DHT blockers to prevent pattern baldness and a receding hairline. This serum supports healthy hair growth, giving you shiny, thicker, and manageable hair. Before buying, have a look at this video featuring a tester’s experience of using the product for more details.

Product Dimensions: 6 x 4 x 4 inches | Weight: 2 Ounces.

Key Ingredients: DHT Halting Technology (Pumpkin seed and Green tea extracts, Keratin, Saw palmetto, Biotin, Caffeine, Coconut, and Argan oils)

Pros
  • No animal testing
  • Paraben-free
  • Sulfate-free
  • Phthalate-free
  • Silicone-free
  • Suitable for all hair types

Cons
  • Strong chalky odor

4. Best Vegan: Lanmeri Hair Growth Serum

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4.5
Lanmeri Hair Growth Serum Image: Lanmeri

If you’re looking for the perfect way to nourish and strengthen your hair while promoting healthier, fuller-looking locks, then look no further than the Lanmeri Hair Growth Serum. This amazing hair growth serum is perfect for fragile hair as it is designed with keratin protein to help reduce excess sebum and DHT on the scalp. Its Keratin Amino Complex helps to repair split ends, reinforce thinning hair strands, and fortify the outer protective layer of each strand. Reviews on Amazon indicate that the formula reduces breakage and damage, all resulting in healthier-looking tresses.

Package Dimensions ‏: ‎ 3.82 x 1.65 x 1.54 inches | Weight: 3.84 Ounces

Key Ingredients: Keratin Amino Complex, Caffeine, and Mung bean.

Pros
  • Lightweight
  • Reduces bald spots
  • Non-greasy
  • Dye-free
  • Gluten-free
  • Alcohol-free
  • Chemical-free
  • Paraben-free
  • Sulfate-free
  • Phthalate-free
  • Silicone-free
  • Suitable for all hair types
  • Formaldehyde-free

Cons

None

protip_icon Pro Tip
To ensure overall hair health, lead with Mountain Top Biotin Herbal Thickening Shampoo and Conditioner. Follow up with the serum on dry or damp hair.

5. Best Non-Greasy: iRestore Anti-Hair Loss Serum

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3.8
iRestore Anti-Hair Loss Serum Image: Irestore

The IRestore Anti-Hair Loss Serum is a revolutionary product that helps fight hair loss and achieve full, voluminous hair. It contains Redensyl that offers clinically proven results to improve hair growth in 3 months. It also nourishes your scalp and reactivates dormant stem cells for maximum regrowth. This serum also contains nourishing ingredients like vitamin E, collagen, vitamin C, biotin, and aloe vera, which boost hair thickness and volume.

Hair Type: All | Product Dimensions: 1.25 x 1.25 x 4.75 inches | Weight: 4.48 Ounces

Key Ingredients: Vitamin E, Vitamin C, and Biotin

Pros
  • Volumizing
  • Drug-free
  • Sulfate-free
  • Gluten-free
  • Paraben-free

Cons
  • None

6. Best Drug-Free: Best Drug-Free Option:Good Lab Blooming & Thickening Serum

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3.9
Good Lab Blooming & Thickening Serum Image: Good Lab

The Good Lab Blooming & Thickening Serum contains a proprietary blend of hair specific vitamins and DHT blockers to promote hair growth. It contains biotin, nettle leaf extract, and saw palmetto that nourishes the hair roots to encourage growth. The guava leaf extract promotes hair growth and controls dandruff, peptides block DHT, and naturally-derived caffeine stimulates the hair follicles. It contains Phytantriol, which improves water retention, strengthens damaged hair and visibly prevents color-wash- out. It also contains rice, wheat proteins and active peptides that promote growth and thickening. This serum fortifies hair shaft elongation and expands the hair growth cycle to give you a thicker and fuller mane. Also, ensure to conduct a patch test on a small part of your tresses before topical application.

Package Dimensions ‏: ‎4.7 x 1.6 x 1.5 inches | Weight: 5.61 Ounces

Key Ingredients: Biotin, Caffeine, Nettle leaf, and Saw palmetto

Pros
  • Contains organic ingredients
  • Safe for colored hair
  • Drug-free
  • Sulfate-free

Cons
  • Expensive

7. Best Handcrafted: Best For Strength And Elasticity:AG Hair Care Root Thikkening Serum

The AG Hair Care Root Thikkening Serum stimulates the roots to promote healthy hair growth. It is fortified with a Regenerative Complex that includes pea sprout extract, ginseng, and ginger to maintain a healthy scalp environment and facilitate hair growth.  The serum also contains panthenol to thicken the hair shaft and make your hair appear fuller and silk proteins to add moisture, elasticity, and strength.

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Key Ingredients: Pea sprout, Ginger, and Ginseng extracts

Pros
  • Handcrafted
  • Contains natural ingredients

Cons
  • Contains alcohol denat and urea

8. Best Paraben-Free: Best Color-safe Formula:Tela Beauty Organics Hair Thickening serum

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Tela Beauty Organics Hair Thickening Serum, 5.0 Fl Oz Image: Tela Beauty

The Tela Beauty Organics Hair Thickening Serum amplifies each hair strand from root to tip to make it appear thicker. This lightweight serum is best for color-treated hair as it contains certified organic baobab oil and a patent-pending Hydro Pelusi Ceramide Complex that aids in plumping the hair strands without making them frizzy. The blend of nourishing ingredients like sugar cane, sugar maple, orange, and lemon extracts soothes your hair and scalp.

Hair Type: Fine | Product Dimensions: 5.5 x 1.75 x 5.5 inches | Weight: 0.8 Ounces

Key Ingredients: Baobab Oil and Hydro Pelusi Ceramide Complex

Pros
  • Vegan
  • Boosts hair density
  • Gluten-free
  • Paraben-free
  • Color-safe

Cons
  • Maay weigh the hair down

9. Best For Hair Growth: Nutrafol Hair Growth Activator

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4.1
Nutrafol Hair Growth Activator Image: Nutrafol

Say goodbye to thinning hair with Nutrafol’s revolutionary Hair Growth Activator! This hair thickness enhancer is fast-absorbing and has a lightweight formula that is 100% natural, vegan, and drug-free. It contains clinically tested ingredients in an advanced delivery system that nourishes your locks for visibly thicker, stronger strands. This hair growth booster is powered by the revolutionary plant exosome technology of upcycled Ashwagandha seeds to boost cell renewal at the scalp, so you can have fuller-looking hair without any hassle. It is also not tested on innocent animals, which makes it an ideal cruelty-free option.

Hair Type: Thinning, Brittle, Sensitive | Package Dimensions : ‎ 4.84 x 1.54 x 1.46 inches | Weight: 4.97 Ounces

Key Ingredients: Ashwagandha

Pros
  • Fortifying
  • Cruelty-free
  • Alcohol-free
  • Paraben-free
  • Sulfate-free
  • Phthalate-free
  • Silicone-free

Cons

None

10. Best Sulfate-Free:BOLDIFY Hair Thickening Serum

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4.1
BOLDIFY Hair Thickening Serum Image: Boldify

The BOLDIFY Hair Thickening Serum is a 3-in-1 formula that conditions, thickens, and promotes hair growth. It is a great fine hair solution that is non-sticky and gets absorbed deep into the hair shaft, seals in moisture, and nourishes the hair strands while protecting them all day long. It is rich in biotin, which reduces hair fall and promotes growth. It is non-flaky and instantly adds volume and shines with the right amount of application. The hair serum contains ingredients that nourish, plump, and strengthen the hair and gives you thicker, longer, stronger, and shinier locks. This hair-strengthening serum also leaves your hair smelling great. You can use it on both dry and damp hair. Additionally, the product is also free from animal testing, which makes it the perfect cruelty-free option for customers seeking ethically conscious formulas.

Hair Type: Fine | Package Dimensions ‏: ‎6.22 x 1.73 x 1.69 inches | Weight: 4 Ounces

Pros
  • Non-sticky
  • Absorbs quickly
  • Instant results
  • Cruelty-free
  • Biotin-enriched
  • 3-in-1 formula
  • Smells good
  • Residue-free formula
  • All-day protection

Cons

None

11. Best Color-Safe: Luseta Biotin Hair Growth Serum

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4.4

Say goodbye to dry, brittle hair and hello to healthy, hydrated locks with the Luseta Biotin Hair Growth Serum. It is infused with biotin and collagen oil that stimulates the scalp to encourage hair growth while nourishing and thickening your strands for a healthier look. It adds a protective seal to every strand for advanced UV protection as well as chemical protection, perfect for helping defrizz, strengthen, and moisturize your hair. Multiple reviewers online love this lightweight serum as it does not weigh the hair down and comes with a pleasing scent.

Hair Types: All | Product Dimensions: 1.8 x 1.8 x 5.3 inches | Weight: 7.68 Ounces

Key Ingredients: Biotin and Collagen

Pros
  • Gluten-free
  • Mineral oil-free
  • Paraben-free
  • Contains organic ingredients

Cons

None

It is very important to select a hair-thickening serum with the right ingredients to get the best results. You should select hair growth serums according to your hair type and hair needs. Using the wrong product can cause long-term damage to your hair health. Given below are some factors to consider while choosing the best hair thickening serums.

How To Select The Right Hair Thickening Serum For Your Hair Type

  • Ingredients

Always prefer naturally nourishing ingredients such as coconut oil and aloe vera over harsh chemicals. The good ingredients to look for in hair-thickening serums are vitamin E, keratin, caffeine, argan oil, green tea extracts, DHT blockers, raspberry ketone, ginger, and ginseng extracts. You should avoid the ingredients that you are allergic to. Also, avoid using hair serums that include sulfate, paraben, gluten, artificial fragrances and colors, ammonia, and other harmful chemicals.

  • Formula

There are two types of hair growth serums, oil and foam. A topical oil may make thin or fine hair appear greasy, but foam offers a lighter, mousse-like solution that is easier to absorb into your hair. Dry hair needs more moisturizing, which is why oil-based hair serums are recommended for dry hair. While some topical treatments must be used once or twice a day, others can be used occasionally or only on wash days. Look out for hair serums that suit your lifestyle and hair care regimen.

  • Price

Pick a serum according to your budget. Look for products from both high-end and drugstore brands. You can also select the best hair-thickening serum based on other users’ experiences but look out for the factors that work for you.

Infographic: Key Ingredients To Look For In Hair Thickening Serums

Environmental aggressors, coupled with unhealthy lifestyle choices, can weaken your hair and reduce its volume. You will need hair serums that restore luster, length, and thickness to your tresses. However, certain ingredients are more beneficial for the purpose than others. We have listed the key ingredients and their impact on hair health in the infographic below. Take a look!

Key Ingredients To Look For In Hair Thickening Serums (infographic)

Illustration: StyleCraze Design Team

The Bottom Line

Thick and dense hair appears healthy, but not everyone has such hair. Fret not! People with thin hair can now turn their hair thicker with the help of the right serum. Some of the serums on our list lift the hair strands, making them appear fuller, while some boost the hair growth and strengthen the hair strands making them thicker. Some others prevent hair fall and strengthen the weaker hair follicles. The Divi Scalp Serum offers scalp nourishment for optimal hair growth. The Lanmeri Hair Growth Serum contains caffeine and keratin to stimulate hair follicles for noticeable hair growth, while the Luseta Biotin Hair Growth Serum is a trusted choice with biotin, a potent ingredient renowned for reducing hair breakage. Investing in the best hair thickening serums would help you get volume in your thin hair. However, try and avoid serums that are loaded with harmful chemicals as they are not safe for your hair.

Frequently Asked Questions

Do hair-thickening serums really work?

Yes, hair-thickening serums containing potent ingredients like biotin, DTH blockers, and caffeine work effectively. Such formulas moisturize and nourish the scalp and increase blood circulation to stimulate the hair follicles and improve the appearance of the hairline.

How do you use hair thickening serum?

Here’s how you can use hair thickening serums:
• Wash your hair before applying the serum.
• Pick the best serum that is made for your specific hair type and concern.
• Fill the dropper and apply the serum directly onto the scalp where you experience hair loss
• Gently massage the serum into the scalp using your fingertips.

Does a hair thickening serum cause hair to thin?

No, hair thickening serums aid hair growth and protect your strands from further damage.

Can we use hair thickening serum daily?

Yes, you can use the hair-thickening serum every day on damp hair. Use it after a hair wash for the best results.

Does hair thickening serum have side effects?

Hair thickening serum alone has no side effects. However, do check out the ingredients list before choosing a product to make sure you are using only gentle, potent, and non-toxic formulas.


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Vanessa Thomas

Vanessa ThomasCosmetic Chemist

Vanessa has over 20 years of experience formulating various types of cosmetics, such as color cosmetics, fragrance, skin care, hair care, over-the-counter/sunscreen, cleaning products, and more. She has a master's degree in cosmetic science and is on the board of the Society of Cosmetic Chemists FL Chapter
Read full bio of Vanessa Thomas