Do Biotin Shampoos Actually Improve Hair Growth? Here's What Experts Say

Biotin, long popular as a supplement for hair, skin, and nail health, is now making waves in shampoo form with claims of thicker, stronger locks. But does biotin shampoo truly live up to the hype? Dermatologists suggest it may fall short when it comes to delivering noticeable changes for hair growth.  

“The theory behind biotin shampoos is that it can add strength to existing hair follicles and possibly enhance hair volume,” says Susan Massick, MD, a dermatologist at The Ohio State University Wexner Medical Center. However, she stresses that there is little clinical evidence to support the effectiveness of topical biotin for hair growth.  

Because shampoo is rinsed off shortly after application, there isn’t sufficient time for biotin to penetrate and offer significant benefits, Massick explains. “Biotin shampoos are going to overpromise and underdeliver when it comes to hair growth and strength,” she adds.  

If you’re considering biotin shampoos or alternatives for better hair health, here’s what you need to know.  

Biotin’s Role in Hair and Skin Health  

Biotin, also known as vitamin B7, is essential for maintaining strong hair, skin, and nails. It aids the body in producing keratin, the protein that forms the structure of these tissues.  

Biotin deficiencies, though rare, can lead to effects such as hair loss, brittle nails, and skin rashes. The daily recommended intake for adults is 30 mcg, which can typically be obtained through biotin-rich foods like liver, spinach, egg yolks, salmon, nuts, seeds, and oats. In cases of deficiency, oral biotin supplements are effective for improving symptoms like hair loss by replenishing levels and boosting keratin production.  

Biotin Shampoo vs. Biotin Supplements for Hair Growth  

For those with normal biotin levels, experts say neither biotin shampoos nor supplements will have a significant impact on hair growth or health.  

Massick emphasizes that oral supplements are the best option for addressing biotin deficiencies. They help stabilize biotin levels and stimulate keratin production, which can prevent hair loss and improve hair strength. Biotin shampoos, however, are unlikely to produce a noticeable effect regardless of biotin levels. “Save your money and don’t be fooled by the advertised promises of miracle growth with biotin shampoos,” advises Massick.  

Effective Alternatives for Hair Growth  

If hair growth is your primary goal, there are more effective solutions worth considering, especially for conditions like androgenetic alopecia (common male- and female-pattern baldness).  

- Saw Palmetto: A plant extract that helps block dihydrotestosterone (DHT), a hormone linked to hair loss. Research has shown that saw palmetto, applied topically or taken as a supplement, can improve hair quality and density in individuals with androgenetic alopecia.  

- Minoxidil: A topical medication proven to treat hair loss from androgenetic alopecia. It enhances hair growth and density when used consistently.  

- Finasteride: A prescription oral medication that slows hair loss and may promote hair regrowth, primarily for men.  

- Hormonal Medications: Drugs like spironolactone can reduce androgen levels in the body, preventing hair loss and potentially stimulating regrowth. These treatments are often prescribed for women experiencing hair loss due to hormonal factors.  

“It’s essential to consider other factors like overall nutrition, stress management, and proper hair-care practices to truly optimize hair growth and minimize hair loss,” says Christina Han, MD, FRCPC, a dermatologist based in Vancouver.  

Conclusion  

While biotin shampoos may sound promising, experts warn they are unlikely to deliver major hair growth benefits. Oral biotin supplements are better suited for addressing deficiencies, whereas conditions like pattern baldness may benefit more from proven treatments such as topical minoxidil, prescription medications, or saw palmetto.  

For comprehensive care, factors like diet, stress management, and hair-care habits should also be addressed. If concerns persist, consulting a dermatologist or trichologist can provide tailored advice for healthier, stronger hair.