The 10 Best Herbs For Hair Growth

When you start researching hair loss or hair thinning, you’ll find everything from prescription pills, topical treatments, and plant-based ingredients, all of which claim to help. You may be wondering what the science says about herbs for alopecia (an umbrella term for hair loss). What are the best herbs for hair growth? And can botanical ingredients really help with male pattern baldness?

We’ll dive into what research says about 10 herbs for hair growth, plus other plant-based treatments that may help.

Male pattern baldness is the most common type of hair loss in men, affecting as many as 50 percent of men by age 50. It’s caused by a combination of factors, including age, genes, and a sensitivity to the male hormone dihydrotestosterone (DHT).

DHT is a byproduct of testosterone, which means the body turns testosterone into DHT. DHT has an important role at certain times in your life (during fetal development, it creates male genitalia, and in puberty, it's responsible for male characteristics like facial features and a deeper voice). Still, later, it can bind to receptors in the hair follicles, causing them to miniaturize. That means they shrink in diameter, eventually leading to hair loss.

You’ll notice that a few of the herbs on this list are thought to inhibit the conversion of testosterone to DHT, which is how prescription hair loss medications, like finasteride work.

Male pattern baldness isn’t the only type of hair loss, however. You could also be experiencing telogen effluvium (that’s hair loss a few months after illness, injury, or a stressful event), certain autoimmune disorders like alopecia areata, or traction alopecia (hair loss typically caused by tight hairstyles that pull at the root).

Consider this a cliff-notes, but you can learn much more about hair loss and its causes in our guide to the causes of thinning hair.

We’ll start with the so-so news: while some herbs potentially aid hair loss, they won’t compete with known hair loss treatment options like finasteride and minoxidil.

Instead, herbs for hair growth tend to work best when paired with other treatment options.

Below, we’ll get into what the science says about the best herbs for hair loss. Spoiler — while more research is needed, some herbs show promise in slowing hair loss.

1. Lavender

Some research indicates that lavender oil used topically may potentially help with hair growth.

A 2016 study found that mice treated with 3 and 5% lavender oil saw an increase in the number of hair follicles and a large hair follicle depth (deeper hair follicles may lead to less hair loss). However, the group treated with minoxidil (the active ingredient in Rogaine and its generic counterpart) saw the most pronounced growth.

2. Peppermint

Peppermint isn’t just for fresh breath. A 2014 study found that 3% peppermint oil applied to the scalp seemed to jumpstart the anagen, or growth, phase of the hair growth cycle. It also seemed to encourage growth by facilitating blood flow to the hair follicle.

But before you douse your scalp in peppermint oil, know that this study was done on mice and has not been replicated in humans.

3. Rosemary

Rosemary is sometimes found in shampoo and other hair care products. It’s known for its antifungal, antioxidant, and antibacterial properties, but that doesn’t necessarily transfer to hair growth (though a healthy scalp is the foundation of healthy hair).

One study found that rosemary oil seemed to produce a similar increase in hair count when compared to minoxidil after three and six months of use. It also was slightly better tolerated (specifically, less itching was reported in the rosemary group).

Rosemary oil is also thought to partially inhibit the conversion of testosterone to DHT (so it’s a 5α-reductase inhibitor). This can help manage hair loss associated with male pattern baldness.

You can learn more about how rosemary oil compares to minoxidil (the active ingredient in Rogaine®).

4. Aloe

Aloe vera gel could theoretically help with hair growth, but there’s not enough evidence to prove that it definitively does. One study examined the effects of aloe ferox gel, oregano oil, and finasteride (a medication approved by the U.S. Food & Drug Administration for treating male pattern baldness) and found that the combo helped treat alopecia. However, that’s probably most likely because of the finasteride.

However, aloe is known to have antibacterial properties that could help manage certain skin conditions like seborrheic dermatitis.

5. Horsetail

Horsetail is sometimes thought to support hair growth because of its high silica content. One 2016 review found that silicon — especially a form of silica called orthosilicic acid — may improve collagen production in the skin, reduce hair fall, and strengthen nails.

However, scientific evidence directly linking horsetail to significant hair growth improvement is limited.

6. Red Clover

Red clover is rich in isoflavones (compounds structurally related to estrogen). These can help prevent the conversion of testosterone to DHT. Some older research suggests that isoflavones promote insulin-like growth factor-I production in mice and humans with alopecia.

A small study (on just 30 men treated with 5% red clover extract applied to the scalp for 4 months) found a 13 percent increase in the anagen phase of the hair growth cycle (where hair actively grows) and a 29 percent decrease in the telogen (resting phase) compared with the placebo group. This is a promising find, but more research is needed.

7. Stinging Nettle

Stinging nettle has antibacterial and anti-inflammatory properties that make it useful for hair health, but there’s not much evidence linking it specifically to hair growth. 

One study that looked at enlarged prostates found that nettle root extract blocked 5α 5–reductase enzyme activity and prevented the conversion of testosterone to DHT, which could theoretically help with male pattern baldness, though that’s now what the study looked at.

It’s found in certain shampoos and hair care products, but note that you should not experiment with using the actual plant on your skin, as it stings (hence the name).

8. Hibiscus

Hibiscus is a flowering plant that is considered an herb. Some animal studies show that ethanol extracts in the hibiscus plant (used at a 10% formulation) can increase hair growth, but more research is needed on humans.

9. Tea Tree Oil

Research suggests that tea tree oil may help reduce seborrheic dermatitis, a type of eczema associated with dandruff.  It’s often touted for its anti-fungal and antibacterial properties, but there’s just not enough evidence to support that these properties enhance hair growth. However, it’s not going to detract from your hair health either.

10. Sage

Sage is often used in cooking as a flavoring agent, but some research suggests it may also help with hair growth. A 2020 study found that sage  has the ability to activate human dermal papilla cells (hDPCs) which are cells at the base of the hair follicles. This study was done on mice and more research is needed on humans.

One thing to keep in mind is that natural doesn’t always mean safer. Some people have contact reactions to essential oils (you should always dilute them in a carrier oil, like olive oil, before applying them to your body). This helps to reduce the potential for side effects, like contact irritation or redness.

Beyond herbs, there are other botanical ingredients that may help support hair growth. We’ll dive into these below.

Saw Palmetto

Saw palmetto is a plant extract derived from the berries of the Serenoa repens tree. It’s commonly used as a natural remedy for hair loss (and it’s found in our tk).

Saw palmetto can partially block DHT from getting into the hair follicles, which is also how the prescription medication finasteride works. In a 2012 study involving 100 men with mild to moderate androgenetic alopecia, 38 percent of those treated with saw palmetto experienced increased hair growth, compared to 68 percent of participants who saw improvements with finasteride.

Pumpkin Seed Oil

Pumpkin seed oil is another natural ingredient that’s thought to act as a 5-alpha-reductase inhibitor (to recap, that means it slows or stops the conversion of testosterone to DHT).

One 2014 study had 76 men with androgenetic alopecia use either 400mg of pumpkin seed oil per day or a placebo for 24 weeks. At the end of the study, the group using pumpkin seed oil had a 40 percent increase in average hair count. The placebo group had an increase of 10 percent.

Learn more in our guide to pumpkin seed oil for hair growth.

Onion Juice

Quercetin, a flavonoid found in onions, is believed to boost blood circulation, which is essential for maintaining a healthy scalp. Interestingly, one of the most widely used hair loss treatments, minoxidil, is also thought to work by dilating blood vessels and increasing blood flow to the scalp.

However, onion juice does not have any effect on DHT levels, so it’s unlikely to have much of an effect at slowing male pattern baldness.

You can learn more about onion juice and hair growth in our guide.

Wondering if herbs or herbal supplements for hair growth really do anything? Here’s what to remember:

• While certain herbs, such as saw palmetto, rosemary, and red clover, show potential for promoting hair growth, the scientific evidence is still limited, and more research is needed to confirm their effectiveness in treating male pattern baldness.

• Herbs may work best as part of a broader hair care routine alongside other proven treatments like minoxidil or finasteride which are approved by the U.S. Food & Drug Administration for treating male pattern baldness.

• Natural remedies like herbs can offer additional benefits for scalp health and hair strength, but it’s important to consult a healthcare professional before starting any new treatment.

To learn more, check out our guide to the best oils for hair growth or herbal remedies, like ashwagandha and hair loss. And if you’re interested in learning more about treatment options for hair loss (beyond herbs), start an online consultation for hair loss to connect you with a healthcare provider who can help find the right hair treatment for you.