10 Best Hair Growth Shampoos 2025 in the United States

The Routine Wellness Anti-Thinning Shampoo and Conditioner Set targets thinning hair by combining biotin, pea peptides, and black seed oil, which are known to support hair strength and reduce breakage. Its clinical testing adds confidence that it might help improve hair thickness and volume over time. A big plus is its gentle formula, free from sulfates, parabens, silicones, and gluten, making it suitable for sensitive scalps and those wanting a cleaner, more natural hair care routine.

It is designed for all hair types, including color-treated and damaged hair, which means it’s versatile and can fit easily into most people’s routines without fear of fading hair color or causing extra dryness. The shampoo and conditioner also promise to boost volume and reduce frizz, leaving hair looking shinier and healthier with regular use. Users who prefer vegan and cruelty-free products will also appreciate the ethical aspect of this set.

While clinically tested for thinning hair, individual results can vary, and it may take consistent use over a period to notice visible improvements. It’s not specifically formulated for scalp conditions like dandruff or severe dryness, so those issues might require additional treatments. The scent is described as fresh and pleasant, but fragrance sensitivity could be a concern for some. This set represents a strong option for anyone looking to gently strengthen thinning or fine hair, add volume, and maintain color-treated strands without harsh chemicals.

Nutrafol Shampoo is designed primarily for adults with dry, brittle, and thinning hair. It's a sulfate-free, color-safe formula that gently cleanses without stripping oils, making it suitable for those struggling with dry scalp and hair fragility. The inclusion of antioxidant-rich Australian Wild Berries, vegan proteins, and prebiotics supports scalp health and hair strength, which is important if your scalp tends to be flaky or oily. The shampoo’s microbiome-friendly certification means it’s less likely to disrupt the natural balance of your scalp, a plus for sensitive or troubled scalps.

Users can expect improved scalp hydration and reduced flakiness, with noticeable results reported within two weeks in clinical studies. The rosemary and mint scent offers a refreshing wash experience. Its large 1-liter bottle with a pump ensures long-lasting use, ideal if you prefer a product that lasts several months.

It is tailored for dry and thinning hair, so those with oily or normal hair types might not find it as effective. Also, since it’s formulated for daily use, people with very sensitive scalps should monitor how their skin responds. If you want a shampoo focused on scalp health and strengthening thin hair without harsh chemicals, Nutrafol offers a thoughtful, science-backed option worth considering.

Redken Extreme Length Shampoo is designed to support hair growth by strengthening damaged and fragile hair, making it a good choice if you struggle with breakage and want longer hair. The shampoo includes biotin, a popular ingredient known to help fortify hair and reduce breakage by up to 81%, which can encourage healthier, stronger strands. It also reduces the appearance of split ends significantly, helping your hair look smoother from root to tip. This shampoo works well for all hair types but is especially beneficial if your hair is damaged or prone to breaking, rather than for people with perfectly healthy hair or specific scalp issues like dandruff.

The floral scent is pleasant, and the shampoo comes in a large 33.8 oz bottle, suitable for regular use. Many users appreciate its strengthening benefits, with the shampoo focusing mainly on hair damage repair and length support. Those looking for quick hair growth or scalp treatment might want to look for additional products.

This shampoo serves as a solid option for anyone with damaged hair aiming to prevent breakage and grow longer hair, but it may be less suitable if your hair or scalp needs specific care beyond strengthening.