Black Tea For Hair: Benefits, Side Effects, and More

Black tea has long been known for its energy-boosting effects (thank you, caffeine) and its health benefits. Produced from the leaves of the Camellia sinensis plant, black tea is a common natural ingredient in skincare and hair care products. The herbal tea is also a popular ingredient in DIY home remedies for dry, damaged, or thinning hair. But does black tea for hair really have benefits?

While the scientific research on black tea and hair loss is mixed, there is some evidence that black tea may offer benefits as part of a hair care routine. Below, we’ve looked into the potential benefits of black tea for hair, as well as the most recent studies on its effectiveness and possible side effects.

Hair loss can occur for many reasons, but for most men, the culprit is dihydrotestosterone (DHT), an androgen hormone that can damage hair follicles and cause male pattern hair loss.

Most evidence-based treatments for male pattern baldness work by lowering levels of DHT within your body, or by increasing blood flow to your hair follicles to promote reliable hair growth and a healthy scalp. For example, the oral hair loss medication finasteride works by reducing DHT production, while the topical medication minoxidil is used to stimulate hair growth by accelerating your hair growth cycle.

So, what does this have to do with black tea? Understanding how and why hair loss happens in men not only makes it easy to understand what’s going on internally, but it also makes it easier to work out if a product like black tea is likely to be an effective treatment for hair loss. 

When it comes to black tea, although there’s no evidence that it directly promotes hair growth or prevents hair loss, there is a small amount of evidence that some natural chemicals in black tea may help to inhibit the hair loss process.

For one, black tea is a great natural source of caffeine, the oh-so-popular stimulant that helps us wake up in the morning and stay alert throughout the day. 

In a 2007 study, a team of researchers looked at the effects of the hormone testosterone and the substance caffeine on hair growth. As expected, testosterone — a powerful androgen hormone converted in the body to DHT — suppressed hair growth. However, this suppression in hair growth was counteracted when the caffeine was applied to the hair follicles. 

When the caffeine was applied to the hair follicles by itself, the researchers observed “significant stimulation” of hair follicle growth. The researchers concluded that caffeine may play a functional role in treating androgenetic alopecia due to its effects on hair growth. 

While these findings are interesting, it’s important to note that this was an in vitro study, meaning it was carried out “in the glass” in a lab using extracted hair follicles, not on real humans. Still, as black tea is rich in caffeine (it has one of the highest caffeine content levels of any type of tea) it’s certainly a point in its favor.

Another laboratory study of caffeine on hair shaft health and growth produced similar findings. In this study, researchers found that caffeine enhanced hair elongation and stimulated the creation of keratinocytes, which are important cells that make up each strand of your hair.

In other words, research — or the research that’s available right now — tends to suggest that the caffeine in black tea might have positive effects on the growth of human hair follicles, at least in a lab setting. 

With this said, there are still lots of unknowns about the overall effects of caffeine in black tea on hair growth and hair loss prevention. There may even be the possibility of experiencing caffeine-related hair loss.

As of now, we don’t know how much caffeine is needed to stimulate hair growth or inhibit the effects of androgens like DHT that contribute to hair shedding. Additionally, we don’t know how caffeine compares to existing treatments for male pattern hair loss, such as FDA-approved hair loss medications. And lastly, since the existing scientific research is confined to lab studies, we don’t know what other effects applying a caffeine-rich substance like tea to your hair could have on a healthy scalp.

As such, it’s best to think of these findings as promising evidence in a positive direction — not as definitive proof that black tea treats male pattern baldness or has other benefits for stimulating hair growth. 

In addition to its potential benefits for thinning hair, research suggests that black tea could also have an effect on hair health and color.

Black Tea May Help to Darken Gray Hair

Black tea’s dark color comes from its high amount of theaflavins (TFs) and thearubigins (TRs), natural pigments that give tea its staining effect. Theaflavins and thearubigins are known to protect against oxidative stress and may play a role in promoting good cardiovascular health.

As pigments, they also act as natural dyes — including for human hair. If you have naturally dark hair and have started to spot a few grays developing in certain parts of your scalp, using a black tea rinse might help temporarily darken these hairs and improve your hair color. 

Just be aware that the effects of black tea rinses are temporary. For longer-lasting results, you’ll want to visit your local hair salon or pick up something more reliable from a drugstore rather than relying on these at-home hair treatments. 

The Antioxidant Properties of Black Tea Might Support Scalp Health

Black tea, green tea, and other popular types of tea are rich in antioxidants, including some that are linked to improvements in skin health. 

While there aren’t any studies on the exact effects of black tea on scalp health, some scientific research suggests that the strong antioxidant activity of certain tea extracts may help to protect the skin from UV radiation and delay the effects of aging.

There’s also some evidence that the compounds in tea extracts may improve microcirculation or local blood flow in the skin. 

These effects may contribute to a healthier scalp by improving your skin’s integrity and limiting the effects of sun exposure. 

Rinsing your hair with black tea is usually a simple process, although there is some preparation involved. Follow these steps to create and use a black tea rinse:

1. Brew strong black tea. Place three to four black tea bags in approximately two cups of boiling water. Steep the tea until it reaches a comfortable temperature, then transfer it to a spray bottle for application to your scalp and hair.

2. Wash your hair. Before applying the black tea rinse, wash your hair with shampoo. Concentrate shampoo on your scalp to wash away any sebum, dead skin cells, and other debris that can reduce the effects of the chemical compounds in black tea.

3. Apply tea to hair and scalp, then wait. Separate your hair into sections, then spray the tea onto your scalp and hair. Using your fingertips, massage the tea into your scalp and hair. Once you’ve fully applied the tea to your hair, wear a shower cap for 30 minutes to one hour to let the tea soak in.

4. Rinse and condition. Use lukewarm or cool water to rinse the tea out of your hair. You might need to rinse several times to remove all of the tea. After you finish rinsing, use a deep conditioner to hydrate and protect your hair before drying and styling.

As a natural hair care ingredient, black tea is generally considered safe, with few reported side effects. Allergies to caffeine or the natural chemicals in black tea are rare, making it unlikely for a black tea rinse to cause any type of allergic reaction.

If you have sensitive skin or dry hair that’s easily irritated, you may want to try a mild black tea rinse (half the normal strength, for example) to see how your scalp responds. You can also test a small amount of black tea on your skin (called a skin patch test) to see if it causes any irritation before applying a black tea hair rinse to your scalp. 

Although homemade black tea rinses are generally safe, some hair care products that contain black tea, green tea, or other tea extracts may have ingredients that can irritate your scalp and cause hair issues. Make sure to check the ingredients list of any shampoos, conditioners, or hair growth products before applying them to your scalp and hair. 

While research on the effects of black tea as a hair growth treatment is currently limited to in vitro studies, the results appear to be promising. Here are some things to keep in mind:

• Beyond potentially stimulating hair growth, black tea also offers several other potential benefits that may make it worth adding to your hair care routine, including improvements in scalp health and darker hair. 

• Depending on your hair type, the benefits offered by black tea may make it easier to maintain healthy hair and avoid common issues that can contribute to hair damage. 

• However, if you’re starting to notice signs of moderate or severe hair fall, you’ll likely get better results from evidence-based treatments, such as finasteride or minoxidil, than from products that solely contain black tea.

We offer these hair loss medications as part of our range of hair loss treatments for men, with finasteride available following an online hair loss consultation with a licensed healthcare provider.