Best 13 Hair Thickening Serum Of 2024: We've Reviewed All Of Them

Medically reviewedby Dr. Amy Revene M.B.B.S.
WrittenbyLuat Duong
Last updated

In 2024, the quest for luscious, voluminous hair remains a top beauty priority for many. 

Understanding this, we have meticulously compiled a list of the 13 best hair thickening serums that promise to transform your hair game. 

These serums are not just any random picks; they are the cream of the crop, each uniquely formulated to breathe life into thinning hair. 

Whether you're battling with hair that's naturally fine or experiencing thinning due to age or environmental factors, these serums are designed to target your specific needs. 

Packed with nourishing ingredients, they tirelessly fortify your strands, promote hair growth, and add that much-coveted thickness and volume. 

13 best hair thickening serums

Here are the top 13 hair thickening serums of 2024, according to our test:

  1. Bio-Pilixin Activation Serum by Scandinavian Biolabs
  2. Hydrating Argan Oil Daily Hair Serum by Forte Series
  3. PURA D'OR Hair Thinning Therapy Energizing Scalp Serum
  4. The Ordinary Multi-Peptide Serum for Hair Density
  5. Pureauty Naturals Biotin Hair Serum
  6. Sephora Strengthening Hair Serum
  7. Camille Rose Ultimate Growth Serum
  8. Votala Hair Growth Serum
  9. SheaMoisture Jamaican Black Castor Oil Hair Serum
  10. Boldify Hair Boost Serum
  11. Vegamour GRO Hair Serum
  12. Blu Atlas Hair & Body Oil
  13. Kiehl's Smoothing Oil-Infused Leave-in Concentrate

1. Bio-Pilixin Activation Serum

Best Hair Thickening Serum

The Bio-Pilixin® Serum from Scandinavian Biolabs is designed to help combat hair thinning and promote growth, using advanced stem cell technology and plant growth factors.

Clinically tested, it improves blood circulation to the scalp, delivering essential nutrients. Notably, 93% of users in a clinical study reported satisfaction with its results within 45 days.

This vegan serum is made with high-quality ingredients, including Capilia Longa®, which significantly reduces hair loss and increases hair density.

Niacinamide strengthens hair by boosting keratin, and Vanillyl Butyl Ether enhances nutrient delivery with a warming scalp sensation.

The Bio-Pilixin® Serum also comes with a 150-day money-back guarantee, ensuring customer satisfaction and confidence in its effectiveness.

Bio-Pilixin® Activation Serum | For Women
Bio-Pilixin® Activation Serum | For Women
Drug-free & clinically tested

2. Hydrating Argan Oil Daily Hair Serum by Forte Series

Hydrating Argan Oil Daily Hair Serum by Forte Series

The Hydrating Argan Oil Hair Serum by Forte Series, tailored for men, is a remarkable choice for those looking to thicken and strengthen their hair daily. 

This serum, which is free from sulfates and parabens, leverages the benefits of argan oil to not only hydrate but also enhance hair volume and fullness.

It's an excellent option for men who frequently style their hair with heat or have sun-damaged hair, acting as a protective pre-styler and a rejuvenating serum. Reducing dryness and controlling frizz makes hair more manageable and appear thicker.

The serum's appealing fragrance and hassle-free rinse-off formula make it a convenient addition to any hair care routine.

For best results in hair thickening, apply a small amount to damp hair before using heat styling tools, followed by your regular styling products.

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3. PURA D'OR Hair Thinning Therapy Energizing Scalp Serum

PURA D'OR Hair Thinning Therapy Energizing Scalp Serum

With its clinically validated formulation, the PURA D'OR Hair Thinning Therapy Energizing Scalp Serum targets reducing hair thinning due to breakage and aims to boost hair volume. 

This potent serum blends 16 key active components, including niacin, biotin, argan oil, and various antioxidants. 

These ingredients work in synergy to cleanse the scalp and support the growth of hair that is robust, healthy, and resilient. It's designed for daily use and is gentle enough for all hair types, even color-treated.

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4. The Ordinary Multi-Peptide Serum

The Ordinary Multi-Peptide Serum

Peptides, vital amino acids for hair growth and strength, are crucial in hair thickening serums, such as the Ordinary Multi-Peptide Serum for Hair Density. 

This serum incorporates powerful peptides like CAPIXYL and Procapil, which not only promote hair growth but also aid in reducing hair loss. Additionally, it strengthens the scalp and nails.

The advantages of this serum include its quick absorption and light fragrance, making it user-friendly. 

To use, apply a few drops to a clean, damp scalp daily, ideally before bedtime. Massage gently until it's fully absorbed; there's no need to rinse it off. 

Key ingredients in this serum include Peptides, Biotin, Caffeine, and Hyaluronic Acid, all contributing to its hair-thickening properties.

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5. Pureauty Naturals Biotin Hair Serum

Pureauty Naturals Biotin Hair Serum

The Pureauty Naturals Biotin Hair Serum is a potent, naturally formulated hair-thickening solution. It works on damp and dry hair, boosting shine and minimizing frizz. 

Key ingredients like biotin, pea sprout extract, pisum, and pro-vitamin B5 nourish hair follicles, reinforcing the roots and leaving hair soft and healthy.

This serum is versatile and practical for all hair types. For optimal results in hair thickening, use just a tiny amount (2–3 drops) and apply it directly to the scalp. 

Gently massaging it in allows for better absorption and maximizes its strengthening effects. Incorporate this serum into your routine for noticeably fuller, stronger hair.

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6. Sephora Strengthening Hair Serum

Sephora Strengthening Hair Serum

The Sephora Strengthening Hair Serum is a unique, nutrient-packed formula available exclusively at Sephora. 

Infused with biotin and plant proteins, it's especially effective for fine hair and suitable for various hair types, including straight, wavy, curly, and coily.

This vegan and cruelty-free serum is also gluten-free, comes in recyclable packaging, and is ideal for addressing hair thinning, damage, and straightening. 

A study revealed that 95% of users noticed more resilient hair, with 85% experiencing a stronger scalp.

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7. Camille Rose Ultimate Growth Serum

Camille Rose Ultimate Growth Serum

This hair-thickening serum for women leverages the revitalizing properties of amla oil and Brahmi herbs to unclog hair follicles and invigorate the scalp. 

It combines sesame and coconut oils with golden jojoba and olive fruit extracts, providing deep hydration and reducing hair breakage. 

The serum's delightful chocolate and honey scent complements its non-oily feel, while its nutrient-rich formula promotes thicker, healthier hair growth and improved blood circulation in the scalp.

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8. Votala Hair Growth Serum

Votala Hair Growth Serum

The Votala Hair Growth Serum is a practical, organic option for both men and women, focused on stimulating hair growth. 

This formula contains vitamin E, fleece flower root, angelica, ginger, niacinamide, and danshen salvia sclarea extract. 

These components work together to rejuvenate inactive hair follicles, making it a powerful ally against alopecia. It nourish the scalp and fosters the development of fuller, more robust hair.

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9. SheaMoisture Jamaican Black Castor Oil Hair Serum

SheaMoisture Jamaican Black Castor Oil Hair Serum

SheaMoisture's Jamaican Black Castor Oil is an exceptional hair-thickening serum, especially beneficial for curly and wavy hair types. It's adept at controlling frizz and is suitable for all hair textures

Ideal for those who frequently use heat styling tools or have chemically treated hair, this serum deeply moisturizes, enriching the scalp and hair with essential nutrients. 

It promotes thicker, stronger hair and leverages peppermint's stimulating effects on the scalp.

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10. Boldify Hair Boost Serum

Boldify Hair Boost Serum

The Boldify Hair Boost Serum, enriched with biotin, is expertly crafted to enhance hair density and health while sidestepping the side effects often linked to hair loss treatments. 

This robust formula blends 30 natural botanicals with four clinically proven peptides to improve scalp health, nourish follicles, increase strand resilience, and stimulate growth. 

Ideal for all hair types, it provides an effortless application and noticeable outcomes. Its unique blend ensures a lightweight, non-greasy texture for softer, fuller hair.

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11. Vegamour GRO Hair Serum

Vegamour GRO Hair Serum

This hair thickening product aims to diminish hair loss and increase hair volume, utilizing natural components like nutrient-dense mung bean, curcumin derived from turmeric, and red clover's antioxidant qualities.

The brand indicates that users may notice more voluminous hair within three to four months with daily use. 

The serum is presented in an eco-friendly glass bottle, showcasing the brand's commitment to sustainability.

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12. Blu Atlas Hair & Body Oil

Blu Atlas Hair & Body Oil

Blu Atlas distinguishes itself in hair and skincare with its premium products featuring clean, vegan ingredients like saw palmetto, argan, and sweet almond oil. 

Saw palmetto oil, known for its anti-inflammatory benefits, fights hair loss while adding hydration and volume. 

Argan oil, packed with vitamin E, fatty acids, and antioxidants, rejuvenates damaged hair and reduces frizz. Sweet almond oil protects hair from UV damage. Regular use of Blu Atlas products yields transformative results.

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13. Kiehl's Smoothing Oil-Infused Leave-in Concentrate

Kiehl's Smoothing Oil-Infused Leave-in Concentrate

This hair-thickening serum, enriched with argan oil, is an excellent solution for combating frizzy, dry hair. It's specifically formulated to not only manage unruly hair but also to enhance its thickness and shine. 

The serum is versatile – apply it to damp hair as a styling aid for shaping and volumizing as it dries, or use it on dry hair to add a quick burst of shine and fullness. 

It's the perfect tool for achieving smooth, thick, and glossy hair whenever needed.

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How to choose the best hair-thickening serum?

Choosing the best hair thickening serum can be transformative for your hair care routine, helping to add volume and vitality to your locks. Here are key factors to consider:

Identify your hair type

Understanding whether your hair is fine, curly, thick, or color-treated will guide you in selecting a serum that caters to your specific hair needs.

Check for key ingredients

Look for ingredients known to promote hair thickness, such as biotin, keratin, peptides, and natural oils like argan and castor oil.

Consider the formula's texture

Opt for a serum that suits your preference in terms of weight and greasiness. Lightweight, non-greasy formulas are usually preferred for everyday use.

Read reviews and testimonials

Gain insights from others' experiences with the product, focusing on results, ease of use, and any potential side effects.


This article explored the world of hair-thickening serums, highlighting their importance in enhancing hair volume and strength. 

When choosing a serum, key considerations include recognizing your hair type, looking for essential ingredients like biotin and keratin, preferring a formula that aligns with your texture preferences, and consulting user reviews for real-world insights. 

From understanding how these serums work to examining specific products, we provide a comprehensive guide to help you make an informed decision in selecting the best hair-thickening serum for your unique hair needs.


What are the main benefits of using a hair-thickening serum?

Hair-thickening serums primarily benefit by increasing the volume and density of hair, making it appear fuller and healthier. They can also nourish the scalp and hair follicles, promoting overall hair strength and reducing breakage.

Can hair-thickening serums be used on all hair types?

Yes, most hair-thickening serums are formulated to be effective on various hair types, including fine, curly, and color-treated hair. However, choosing a serum that specifically suits your hair type is important for the best results.

How often should I use a hair-thickening serum for effective results?

The frequency of use depends on the specific product's instructions. Generally, daily use is recommended for most serums to achieve noticeable results, but it's important to follow the guidelines provided by the manufacturer.



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Luat Duong

Luat Duong is a Copenhagen-based writer and content strategist specializing in hair loss and health. His work has been featured in MyHealthGuide, The Right Hairstyles, and Woman's Era. He is a graduate of Vaasa University. You can connect with him on LinkedIn.