The Very Best Natural & Clean Hair Growth Products For Men + What To Look For

This plant-based hair growth serum is a dream for those who want to encourage regrowth without irritating the scalp. The dropper is small but filled with a mighty formula (I mean, just look at the before and after photos in the review section). This is why it's perfect for the hairline—it's powerful enough to encourage regrowth and being used on a smaller section will make it last.

What users say:

This serum has a serious following from people of all genders because it's highly effective. (And no matter how you identify, we all want effective products, no?) Here's what one reviewer said: "I have had a fair amount of hair loss, I lost about half of my hair due to vitamin deficiencies, anemia, stress, and overall lack of protein in my diet. I lost around half of my hair in the span of like a month or two. And I promise this stuff is the one product I found that actually works. I didn’t want to use minoxidil, that was kind of going to be my last resort. But once I started using this product my hair stopped falling out, and started to grow back, and honestly grows faster than before."

This hair growth system is just that—a system. More than just a serum, this product duo tackles hair loss from the inside and the outside for all-around support. The serum stimulates the scalp via lactic acid, tea tree, and caffeine while simultaneously nourishing the barrier with sea buckthorn extract, panthenol, seaweed extract, and more naturally-derived additions. The supplement blend is packed with saw palmetto extract, marine collagen, and ashwagandha to encourage hair growth and skin health from within.

What users say:

Not only do men rave about this product ("My hair was making me feel older than I was before Nutrafol," says one 46-year-old), but clinical studies back it up: 85% of users saw improved hair health using the serum after 30 days, and 84% of users saw improved hair growth with using the supplement after 6 months.

This highly concentrated solution contains a blend of unique and science-backed ingredients. First up: A blend of 7 different peptides to target growth factors and skin proteins to encourage a healthy scalp and thicker strands. Nanofluorosomes, a potent anti-inflammatory and anti-androgenic compound give the blend a fluorescent hue, which can be additionally activated via laser or light source—so if you're using a light device, pair it with this blend to supercharge the growth potential.

What users say:

This high-tech formula has caught the eye of many. Here's what one user said: "I have been using Kerafactor Scalp Stimulating spray and shampoo for three months and have noticed increased hair fullness in the balding section of my scalp and an associated thickening of my hair generally. It is a remarkable new product that is simple to use and shows incredible immediate results."

This Stem Cell Serum has sold out again and again—for good reason. The ultra-nourishing blend of plant-derived stem cells joins bamboo extract and aloe vera in a superior hydrating INCI list. The blend is clean as can be—free of synthetic fragrance, silicones and parabens. If you're starting to see minor hair loss or just want to prevent thinning in the first place, add this serum to your routine to show your scalp some T.L.C.

What users say:

Not only do people use this to calm irritated scalps, but users notice healthy hair growth with continued use: "My hair seems to be growing out thicker and darker at the roots with the first bottle. I will continue using!"

If you can't be bothered to add another step to your routine (no shame, hair care can be intensive), then consider opting for thickening shampoo. This formula is a low-lift way to incorporate healthy scalp practices into your routine. Saw palmetto encourages hair growth while eucalyptus provides stimulation and a spa-like scent. If you want to add a leave-in product to your routine (which is highly encouraged) Hims has a plethora of options to check that box too.

What users say:

This shampoo may be a wash-off product, but the innovative ingredients still put in the work. One reviewer says: "After a few days my hair looked noticeably thicker. It even worked on my beard, which is nice because my beard does not grow in as thick and full as I'd want it to."

If you're looking for a good launching point to ease you into the world of leave-on hair products, this serum is a great start. Packed with peptides, caffeine, and plant extracts, you'll be nourishing your scalp, sans extra spending. Massage the serum into your scalp during the day or at night to encourage growth. Reviews mention a greasy residue post-application, so an evening ritual may be best.

What users say:

While it may leave a noticeable residue for some, most folks rave about how full their hair grows in: "There is visible growth with just one bottle. There are new hairs coming in," says one. Another notes: "Within a month of using this serum I have noticed so many new hairs. It's worth every penny."

This one was recommended by certified trichologist and hair expert Shab Reslan—she even swears by it herself for thicker locks. "It uses low-level red light that's safe (FDA cleared) and doesn't get warm. This encourages healthier hair growth and stimulates the cells in the follicle by photobiomodulation, which is the same technology that plants use from the sun to grow," Reslan once told mbg. Use for 11 minutes 3 times a week—perhaps in combination with a hair serum for double the growing power.

What users say:

While using LED light for hair growth is still a new concept for people, there's good research to support it's use (which can justify the price tag). As one person wrote: "I've been using the HairMax Ultima 9 for 2 weeks and I've already noticed changes! Significantly less hair falling out in my brush, my clothes and my shower."

As mentioned in the next section, rosemary oil is A+ for science-backed hair growth, sans irritation. This rosemary oil blend is pure and organic, meaning you don't have to worry about irritating additives or fillers. Put a dropperful of oil on any area you want to increase growth before falling asleep and wash it out the next morning to avoid sporting a greasy look—unless that's what you're going for.

What users say:

This simple formula brings the results—as hundreds of reviewers have noted. One says the regrowth is noticeable: "I'm not usually one to write a review but i was truly surprised by the results of this mighty bottle. I looked in the mirror yesterday and realized i have new hair growth and significantly less shedding. I’d recommend this to anyone who wants less shedding, more growth, and overall healthier hair!"