The 10 Best Hair Growth Serums for a Fuller Mane

• Derm-approved

• Some may not prefer the smell

“Saw palmetto is a botanical extract that has been used by Native Americans as medicine for hundreds of years,” says Dr. Green. “It features antiandrogenic properties that have been shown to improve hair growth in those experiencing androgenetic alopecia and telogen effluvium (or temporary hair loss caused by stress).” Although commonly found in hair growth serums and supplements, Dr. Green says it’s still important to note that “extensive clinical studies are needed to prove its efficacy and safety in long-term use.”

This top-rated formula features saw palmetto and a range of other natural oils, like moringa oil for hydration and rosemary oil to help stimulate hair growth further. Since this product is oil-based, it should be washed out of hair following application.

Key ingredients: Saw palmetto, rosemary oil, moringa oil

Hair Type: Dry, brittle, thinning

Size: 1 fl. oz.

How to use: Apply two to three drops to the scalp in affected areas and gently massage in. Leave on overnight or a minimum of 30 minutes before showering. Apply two to four times per week.

Amazon rating: 4.2/5 stars

An Amazon reviewer says: “I’ve tried so many things for hair thinning and shedding throughout the years, but had no significant results after months of use. This is the first product I’ve used that gives me hope. I just started using this product a few days ago, and I already notice at least a 75 percent reduction in shedding. The hairs at the crown of my head are already feeling thicker, and I had a long-standing sore sensation at the crown of my head that is starting to subside. This stuff is magic! I’m excited about the progress I’ll see in a few weeks/months.”