Hair loss can happen for many reasons. Stress, hormonal changes, nutritional deficiencies, aging, and genetics can all affect the health of your hair. While no supplement can guarantee thicker hair or completely stop hair loss, some formulas have earned a loyal following thanks to their ingredient profiles, clinical research, and consistently positive customer feedback.

Browse Amazon's best-selling hair growth supplements, and you'll find hundreds of options claiming to deliver stronger, fuller hair. But only a handful have built a solid reputation among consumers while also featuring ingredients backed by scientific research.

To help narrow the field, we looked at some of the most popular hair supplements available today. These products consistently receive strong ratings from Amazon shoppers and, in several cases, have been evaluated in clinical studies or reviewed by healthcare professionals.

Whether you're experiencing seasonal shedding, postpartum hair loss, thinning hair, or simply want to support healthier hair growth, this guide compares 10 of the most trusted supplements on the market.

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Best Hair Growth Supplements at a Glance

Individual results vary depending on the cause of hair loss, age, diet, and overall health.

1. Nutrafol Women

Best Overall Hair Growth Supplement

If there's one supplement that consistently appears at the top of hair wellness recommendations, it's Nutrafol. Unlike many competitors that focus primarily on biotin, Nutrafol takes a broader approach by targeting several common factors associated with hair thinning, including stress, inflammation, and hormonal imbalance.

Its formula combines marine collagen, saw palmetto, tocotrienols, curcumin, and Ashwagandha—an adaptogenic herb commonly used to help manage stress. Rather than relying on a single ingredient, Nutrafol delivers a multi-targeted blend designed to support healthier hair from within.

One reason Nutrafol stands out is its growing body of clinical research. Several company-sponsored studies have reported improvements in hair density, thickness, and overall appearance after consistent use for three to six months. While independent research remains limited, dermatologists frequently mention Nutrafol among the better-formulated nutritional supplements available today.

Amazon reviewers often report seeing less shedding first, followed by gradual improvements in volume and thickness after several months of daily use. Because of its premium ingredient list, Nutrafol is also one of the more expensive options on the market.

Pros

• Comprehensive ingredient profile
• Includes clinically studied botanical ingredients
• Targets stress-related hair thinning
• Frequently recommended by dermatologists

Cons

• Premium price
• Requires consistent daily use for several months

Best for: Women experiencing gradual thinning, stress-related hair loss, or age-related changes in hair density.

2. Viviscal Extra Strength

Best Clinically Researched Marine Supplement

Viviscal has been one of the biggest names in hair supplements for decades, and much of its reputation comes from its proprietary AminoMar Marine Complex. This marine-derived protein blend is combined with biotin, vitamin C, zinc, and several amino acids that support normal hair growth.

Unlike many supplements that rely mainly on marketing claims, Viviscal has been evaluated in multiple clinical studies. Although most of the available research is relatively small, findings have generally shown improvements in hair thickness, reduced shedding, and increased hair count after several months of consistent supplementation.

Its marine-based formula is often recommended for people with diffuse hair thinning rather than severe hereditary hair loss. Many users report healthier-looking hair, improved texture, and stronger strands before noticing significant new growth.

Because the formula contains marine ingredients, Viviscal may not be suitable for people with fish or shellfish allergies.

Pros

• Proprietary marine complex
• Multiple published clinical studies
• Helps improve hair thickness and density
• Trusted global reputation

Cons

• Contains fish-derived ingredients
• Daily consistency is essential

Best for: Adults with fine, thinning hair who want a supplement supported by clinical research.

3. Priorin

A Trusted European Favorite for Hair Thinning

Priorin has been recommended by pharmacists and dermatologists across Europe for years. Manufactured by Bayer in many international markets, the supplement has become especially popular among women dealing with temporary or seasonal hair shedding.

Its formula combines millet extract, L-cystine, biotin, and pantothenic acid. Millet extract provides plant-based nutrients, while L-cystine is an amino acid involved in keratin production—the primary structural protein found in hair.

Rather than promising rapid regrowth, Priorin focuses on nourishing the hair follicle and supporting normal hair growth over time. Many users notice reduced hair fall before they see improvements in volume or thickness.

Compared with newer supplements packed with dozens of ingredients, Priorin takes a simpler approach, which many consumers appreciate. It remains one of the most recognizable hair supplements throughout Europe and continues to receive positive reviews from users looking for a reliable daily formula.

Pros

• Well-established European reputation
• Simple, focused ingredient blend
• Easy daily routine
• Suitable for long-term use

Cons

• Clinical evidence is more limited than some competitors
• Results may take several months

Best for: Seasonal hair shedding, mild thinning, and people looking for a trusted European supplement. 

4. PHYTO Phytophanère

Best Premium French Hair Supplement

PHYTO Phytophanère has been one of France's most trusted hair supplements for decades. Instead of relying only on biotin, it combines biotin, zinc, B vitamins, vitamin C, vitamin E, and essential fatty acids to help nourish hair follicles and support stronger, healthier hair.

Many Amazon shoppers say they notice less breakage, improved shine, and healthier-looking hair after several months of consistent use. Because the formula also supports nail health, it's a popular choice for people looking for an all-in-one beauty supplement.

Although it's more expensive than basic biotin products, its premium botanical formula has helped it build a loyal following worldwide.

Pros

• Premium French formula
• Supports hair and nail health
• Balanced blend of vitamins and botanical ingredients
• Trusted beauty brand

Cons

• Higher price than many competitors

Best for: People looking for stronger hair and healthier nails with a premium European formula.

5. Perfectil Hair

Best Value for Everyday Hair Support

Perfectil Hair is one of the most affordable and widely recommended hair supplements on the market. Developed by Vitabiotics, the formula combines biotin, zinc, selenium, iron, vitamin D, and B vitamins to help support healthy hair growth and address common nutritional deficiencies.

Rather than targeting severe hair loss, Perfectil focuses on improving overall hair health. Many Amazon reviewers report stronger hair, reduced shedding, and healthier nails after a few months of daily use.

Its combination of quality ingredients and reasonable price makes it one of the best value-for-money options available.

Pros

• Excellent value
• Complete vitamin and mineral formula
• Supports hair, skin, and nails
• Widely available

Cons

• Not designed specifically for advanced hair loss

Best for: Anyone looking for an affordable daily supplement to support healthier hair.

6. Nature's Bounty Hair, Skin & Nails

Best Budget-Friendly Beauty Supplement

Nature's Bounty Hair, Skin & Nails remains one of Amazon's best-selling beauty supplements thanks to its affordable price and simple formula. It combines high-potency biotin, collagen, hyaluronic acid, and antioxidant vitamins to support healthy hair, skin, and nails.

While it isn't marketed as a medical hair-loss treatment, many users report stronger nails, shinier hair, and less breakage after regular use. It's especially popular among shoppers who want a reliable daily beauty supplement without spending premium prices.

Pros

• Budget-friendly
• Includes collagen and hyaluronic acid
• High-potency biotin
• Trusted supplement brand

Cons

• May not be enough for significant hair thinning

Best for: Anyone looking for an affordable supplement that supports hair, skin, and nail health.

7. Sports Research Biotin

Best High-Potency Biotin Supplement

Sports Research Biotin is designed for people who want a simple, high-quality biotin supplement. The formula delivers high-potency biotin in a clean, non-GMO, gluten-free softgel without unnecessary ingredients.

Biotin plays an important role in keratin production, but it's worth remembering that supplementation is most beneficial for people who are actually deficient in biotin. Many Amazon reviewers praise this product for healthier-looking hair, stronger nails, and excellent overall quality.

Its clean formula and third-party testing have made it one of Amazon's most popular standalone biotin supplements.

Pros

• High-potency biotin
• Third-party tested
• Non-GMO and gluten-free
• Excellent value

Cons

• Best suited for people with biotin deficiency

Best for: Anyone looking for a straightforward, high-quality biotin supplement.

8. Solgar Skin, Hair & Nails

Best Trusted Legacy Brand

With more than 75 years in the supplement industry, Solgar has built a reputation for high-quality formulas. Its Skin, Hair & Nails supplement combines MSM, vitamin C, zinc, copper, silica, and amino acids to support collagen production and healthy hair growth.  

Unlike products that rely mostly on biotin, Solgar focuses on providing the nutrients needed to maintain stronger hair while also supporting healthy skin and nails. Many Amazon shoppers appreciate its clean formula, vegan-friendly ingredients, and consistent quality.

Pros

• Premium ingredients
• Supports collagen production
• Vegan and gluten-free
• Trusted supplement brand

Cons

• More expensive than basic vitamin supplements

Best for: People looking for a premium daily supplement from a well-established brand.

9. Codeage Hair Vitamins

Best Complete Hair Formula

If you prefer an all-in-one formula, Codeage Hair Vitamins offers one of the most comprehensive ingredient lists available. The supplement combines 10,000 mcg of biotin, marine collagen, keratin, hyaluronic acid, omega-3, probiotics, saw palmetto, vitamins, minerals, and botanical extracts in a single formula.

Rather than focusing on one nutrient, Codeage is designed to support hair health from multiple angles. Its premium formula has made it increasingly popular among Amazon shoppers who want a comprehensive beauty supplement.

Pros

• More than 40 active ingredients
• Includes collagen and keratin
• Contains probiotics and botanical extracts
• Non-GMO and gluten-free

Cons

• Premium price
• Requires taking multiple capsules daily

Best for: Users looking for one of the most complete hair supplements available.

10. Hairfluence

Best Amazon Favorite

Hairfluence has become one of Amazon's most popular hair supplements thanks to its combination of biotin, collagen, hydrolyzed keratin, horsetail extract, bamboo silica, and essential vitamins. Its formula is designed to strengthen hair, reduce breakage, and improve shine.

Many users report noticing healthier-looking hair and stronger nails after several months of regular use. While it isn't intended to treat medical hair loss, its balanced ingredient profile and affordable price have made it a favorite among shoppers looking for everyday hair support.

Pros

• Popular among Amazon customers
• Includes collagen and botanical ingredients
• Helps support stronger hair and nails
• Good value for the price

Cons

• Results vary by individual
• Less clinical research than some leading brands

Best for: People looking for a balanced hair supplement with strong customer reviews.