Why Does My Facial Hair Grow So Fast (Any Way To Slow it Down?)

You shaved this morning but by lunch hour your beard is already visible. Why is it growing so fast? Is there anything you can do to slow down the pace? Let’s look at some beard science to find the answers.

The speed of facial hair growth is largely determined by your genetics, but can also be affected by your ethnic background and hormone levels. Facial hair growth is driven by androgens, with testosterone being the main androgen responsible for facial hair growth. The way your hair follicles respond to testosterone can affect the rate of growth.

If you want to find out the science behind facial hair growth and learn some tips to slow it down, read on!

Reasons why your beard or facial hair grows so fast (according to science)

The color of your hair, eyes, and even your ease or difficulty growing facial hair can be traced back to your genes. Your genetic makeup affects the sensitivity of your hair follicles to hormones. 

There are several reasons why your beard grows fast. Your genetics, ethnic background, and hormone levels can affect the rate of facial hair growth.

Testosterone and dihydrotestosterone are the specific hormones responsible for beard growth. Testosterone is responsible for the priming of hair follicles, while dihydrotestosterone promotes the linear growth of the hair.

There are two main types of hair: vellus and terminal. Vellus hairs are short, thin, and wispy. Terminal hairs are androgenic – these are the hairs that are found on your face. This type of hair grows thicker, faster, and longer than vellus hair.

Fun Fact: The Guinness World record holder for the longest beard was Hans Langseth. His beard measured in at 17 feet, 6 inches. He was of Norwegian-American descent.


We’re all born with a certain number of hair follicles. Each follicle is independent and the hairs must go through the four stages of hair growth: anagen, catagen, telogen, and exogen. Your genes affect how quickly each hair progresses through this process.

An individual’s genetics is the primary determiner of facial hair growth. A man’s father and both maternal and paternal grandfathers predict patterns of beard growth.

A specific gene, Lxh2, has been discovered to regulate hair growth. New findings like these have the potential to lead to intervention strategies where hair growth could be turned on and off.

Ethnic background

A 2017 study showed that 35% of white/Caucasian males, 35% of black/African American males, 26% of Hispanic American/Latino males, and 10% of Asian males always wear a beard. These trends are affected by the ease of beard growth.

A man’s ethnic background can affect how fast and how thick his beard grows. 

Surprisingly, the ethnicity with the densest hair is Caucasians, more specifically those of Semitic or Mediterannean descent. In contrast, Asians have the least hair density. These findings fall right in line with the above study about men who sport full-time beards.

Even among women, race has been clinically proven to be a larger predictor of facial hair growth than skin pigmentation.

Fun Fact: The hairiest man alive is Larry Gomez, nicknamed “Wolf Man” from California. 98% of his body is covered in hair. He is one of only 100 people living with the rare genetic condition, hypertrichosis, which causes excess hair to grow. 

Hormones (Testosterone)

The majority of men have testosterone within normal limits. The rule of thumb is if you can make it through puberty and grow secondary hair in other places, you have acceptable hormone levels. 

Testosterone is the main androgen hormone responsible for facial hair growth. The ability of the hair follicles to convert testosterone into dihydrotestosterone affects the rate of growth.

While testosterone is a necessary factor, studies show that beard length is not an adequate predictor of this hormone’s level of dominance. However, if you are seeing full, fast beard growth, chances are your testosterone levels are at a healthy level.

Factors that affect testosterone

Facial hair follicles are fed by blood vessels. A healthy lifestyle keeps blood vessels in tip-top shape. Your diet and lifestyle choices not only affect your body’s health, but they directly affect facial hair health.

There are lifestyle factors that can affect levels of testosterone. Diet, exercise, stress, and rest are important for hormone maintenance. 

If you are looking to slow down your beard growth, don’t try to sabotage these areas. Remember, testosterone is only one factor responsible for your beard journey. If your desire is faster-growing facial hair, these tips can keep your hormone levels in check.

Let’s look at some specific changes you can make to keep your testosterone at peak efficiency:

Does shaving make facial hair grow faster?

We’ve all heard the myth that shaving can make the hair grow back thicker or faster. However, this isn’t true. The hair follicles are already genetically programmed with your hair growth speed.

Shaving does not make facial hair grow faster. When hair begins to grow, the coarse tip of the hair makes it appear darker and more noticeable. Many people mistake this appearance as thicker or faster hair growth.

Hair growth depends on the amount of time it takes for each hair to grow through the growth stages. 90% of hairs are in the anagen growth phase at any given time.

Fun Fact: While shaving doesn’t make your facial hair grow faster, the seasons can! Studies show that the slowest facial growth is seen in January and February while the fastest growth rate is seen in July.

Can you stop facial hair from growing so fast?

Beard lovers embrace a thick, quickly grown beard, while the clean-shaven camp looks for ways to slow down the growth and reduce shaving time. Facial hair grows an average of .27mm per day or one half-inch per month. Of course, that’s just an average so some men can experience a faster or slower rate.

While you can’t alter the genetics you were born with, there are ways to slow down facial hair growth. Ruling out any underlying medical concerns or using topical hair-slowing products may stop facial hair from growing at a fast rate.

Maybe your rapid-fire beard growth is a sign from the universe to grow and keep a beard full time. However, if you are intent on slowing the stubble, there are some things you can try.

Rule out any medical concerns

If your hair is suddenly growing faster than normal, there could be an underlying medical issue.

If you suddenly find your facial hair growing at warp speed, visit your doctor. Hormone imbalances, autoimmune issues, and even cancer can cause hair growth changes. 

Use topical hair slowing products

There are hair-slowing products on the market specifically targeted at men and facial hair.

Magic Shaving Powder has gone viral on TikTok lately. It’s a depilatory that removes hair from under the skin causing it to take longer to grow back. Calcium thioglycolate and hydroxide are used to remove the hair. These chemicals can irritate sensitive skin, so do a patch test first.

Want to learn more about Magic Shaving Powder? Check out this article!