10 Best Hair Thickening Serums 2025 in the US

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1 Our Pick
Men’s Rogaine 5% Minoxidil Foam – Hair Regrowth Treatment, 3-Month Supply
  • Tricho-Prime Technology: Promotes a healthy environment for hair regrowth.
  • Early Stage Use: Best for addressing early-stage hair thinning effectively.
  • Anti-Hair Loss Foam: Specifically designed to combat hair loss issues.
  • Topical Treatment: Easy-to-use foam application for convenience.
  • 3-Month Supply: Comes with three 2.11-ounce containers for extended use.
  • Highly Rated: Top rated product chosen by many users for effectiveness.
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2
Divi Scalp Serum for Thinning Hair, 30ml – Nourishing & Clinically Tested
  • Clinically tested; 90% report improved hair fullness and 87% density increase.
  • Targets thinning hair with amino acids, caffeine, peptides, and rosemary oil.
  • Effectively reduces product buildup, ensuring a clean and balanced scalp.
  • Easy daily application to wet or dry hair; no rinse required for convenience.
  • Suitable for all hair types including extensions; great for shedding and dry scalps.
  • Comes in two sizes for versatile use according to personal preference.
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3
Nioxin Scalp + Hair Thickening System 2 for Thinning Natural Hair – Full Size
  • Increases hair thickness and fullness for a healthier appearance.
  • Strengthens hair to protect against damage and breakage.
  • Cleanses scalp by removing sebum and product residues effectively.
  • Maintains moisture balance for better control of natural hair.
  • Recognized with 16 awards from Behind the Chair Stylist Choice.
  • Available in four distinctive styles to meet different hair needs.
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4
Rogaine Women’s 5% Minoxidil Foam for Thicker Hair Regrowth, Unscented, 4-Month Supply
  • 5% Minoxidil formula proven to regrow 48% thicker hair.
  • Tricho-Prime Technology enhances scalp absorption.
  • Easy to use: Apply half a cap of foam once daily.
  • Dermatologist recommended as the top brand for hair regrowth.
  • Targets hereditary hair loss specifically for women.
  • Includes two 2.11 oz containers for a 4-month supply.
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5
Bali Secret Hussell Hair Serum 80 Capsules – No Rinse with Essential Oils & Vitamins
  • Salon Finish: Keeps hair silky smooth and soft with a shiny appearance.
  • Easy to Use: Apply serum after washing; no rinsing required for convenience.
  • Safe for All Hair Types: Works well on straight, wavy, curly, frizzy, and dyed hair.
  • Nourishing Ingredients: Contains avocado, macadamia, argan oil, and vitamins for hair health.
  • Great Gift Idea: Perfect present for friends and hair care enthusiasts.
  • Pack of 2: Provides twice the value with 80 capsules for continuous use.
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6
Nutrafol Women’s Hair Serum for Thicker, Stronger Hair – 1 Fl Oz, Vegan & Fast-Absorbing
  • Clinically tested serum for visibly thicker and stronger hair.
  • Lightweight, non-greasy formula with fast absorption properties.
  • Promotes visible results in as little as 90 days with daily use.
  • Contains science-backed ingredients like Ashwagandha Exosomes.
  • Physician-formulated to enhance hair thickness and reduce breakage.
  • Includes beneficial elements like Irish Moss Peptides and Pea Sprout Extract.
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7
VEGAMOUR GRO Hair Serum for Thinning Hair, Non-Oily Scalp Serum, 30-Day Supply
  • Plant-based phyto-actives soothe scalp and reduce shedding.
  • Visible results in 90 days for thicker, fuller hair.
  • 95% of users saw less hair fallout, 100% healthier-looking hair.
  • Non-greasy, water-based formula for easy daily application.
  • Clean, vegan, and cruelty-free; no silicones or hormones.
  • Clinically tested ingredients for effective hair support.
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8
VEGAMOUR GRO+ Advanced Hair Serum for Hair Density and Scalp Health
  • Dermatologist co-developed to target severe shedding and scalp issues.
  • Clinically proven: 93% improvement in hair density in 120 days.
  • 98% reported less shedding, 95% noted less hair in the shower.
  • Powered by GROACTIVE+ Complex, rich in plant actives for protection.
  • Lightweight, fast-absorbing formula; vegan and cruelty-free.
  • Free from silicones and fragrance for a clean application.
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9
Babe Original Locks Densifying Hair Serum for Thinning Hair & Hair Loss
  • Contains 3 peptide blends to promote overall hair health and density.
  • Nourishing ingredients include biotin, keratin, and argan oil for hair vitality.
  • Aloe vera and ceramides support a balanced and healthy scalp ecosystem.
  • Comes with a pipette for accurate and easy application of the serum.
  • Encourages blood circulation during application for added scalp benefits.
  • Suitable for both men and women experiencing hair thinning issues.
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10
Nioxin Hair Fall Defense Leave-In Treatment with Caffeine & Niacinamide, 2.3 Fl oz
  • 93% of users reported less hair fall while using the treatment regularly.
  • 91% experienced improved hair anchorage and better resistance to shedding.
  • 93% felt their hair appeared thicker and fuller after using the product.
  • 90% noticed a significant reduction in hair breakage with consistent use.
  • Formulated without parabens, sulfates, or colorants for healthier hair.
  • Includes beneficial ingredients like caffeine, lauric acid, and niacinamide.
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