We Answer It Once And For All: How Fast Does Hair Really Grow?

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How Much Does Hair Grow In A Month According To Experts?
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Contributing writer By Andrea Jordan
Contributing writer
Andrea Jordan is a beauty and lifestyle freelance writer covering topics from hair and skincare to family and home. She received her bachelor's in Magazine Journalism from Temple University and you can find her work at top publications like InStyle, PopSugar, StyleCaster, Business Insider, PureWow and OprahMag.
April 17, 2021 — 11:04 AM
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How Much Does Hair Grow In A Month According To Experts?
Hey Google, how much does hair grow in a month? Chances are at some point in your lifetime you’ve scoured the internet with this search topic in hopes of growing longer, stronger hair faster. Because, to be honest, for some reason when we have a hawk eye on our hair growth, it’s nearly impossible to see. Cue the impatience. Perhaps you’re hoping to quickly grow out an impromptu haircut gone awry or you’re in the mood to change your ‘do. Whatever your reason, we’re here to answer the age-old question and get to the bottom of monthly hair growth once and for all. Keep reading to learn more.  
In This Article
5 Ways to support healthy hair
How much does hair grow in a month? 
The quick answer is, on average, hair grows about ¼ inch to ½ inch a month, according to Bridgette Hill , certified trichologist and founder of Root Cause Scalp Analysis . Of course, this may vary from person to person, but if your hair (and scalp) are healthy, your hair should and will grow each month . 
To better understand hair growth, professional hairstylist, Sophia Porter breaks down the four main stages: Anagen, catagen, telogen, and exogen. Anagen is the growth stage, “where your hair grows and the maximum length is determined,” Porter says. This can last 2 to 7 years, depending on the person and is the longest stage in the hair growth process. Next up is catagen or the regression and transition stage. In this phase that lasts about 7 to 10 days, hair growth slows and the follicles shrink.  
According to Porter, 10-15% of hair on the scalp are going through the telogen stage at a time. During this chapter of growth, old hair is resting and new hairs are growing. And finally, exogen is when the hair is shed from the follicle. “On average, a person loses about 50 to 150 hairs a day,” Porter says. So, don’t be alarmed if you see a few strands in your hair brush. 
Don’t worry if this seems overwhelming to understand. The most important thing to note is that hair growth, like all things in life, is a process and you should, in fact, see growth if your hair and body are healthy (more on this below).  
Summary
Hair grows about ¼ inch to ½ inch a month.
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Factors that impact hair growth 
Even though we know that hair should grow consistently each month, there are a variety of reasons that your growth may be stunted. “Hair loss is polygenic, meaning there are many genes involved that result in hair loss, yet it could be triggered by something as simple as an allergic reaction to hair products,” Hill says. 
Hill says genetics and hormones have the most significant impact on hair growth, but there are other factors to keep in mind. Hormone change can be due to health, pregnancy, or stress. And if we’re being honest, some people just have fast-growing hair in their genes (#blessed).
Of course, the overall health of your body can make a difference. Chronic illnesses, fevers and medications can affect how the hair grows. Then, there are lifestyle factors like stress, diet and vitamin deficiency play a role in hair growth, too. “It’s very important to have a balanced diet and maintain a healthy lifestyle to keep hair growth at its optimum level,” Porter says. 
5 ways to support your hair growth this month 
“The most basic step is to be great to your body,” Hill says. “Invest in your health and wellness to give your scalp and hair a fighting chance.” And while there’s no miraculous pill or practice that will magically make your hair grow faster or longer instantly, here are some expert tips to improve your chances for better results . 
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1. Try a scalp treatment and massage
A healthy scalp is essential to growing healthy locks. Hill recommends using a scalp mask of oil that addresses the current need of your scalp and help with cellular turnover. “I suggest that my clients sleep in their pre-scalp treatment for optimal results,” Hill says. You can also activate the scalp muscles and improve circulation by massaging the scalp . In fact, in a 2016 study, a small number of men received a daily four-minute scalp massage. At the conclusion of the study, the investigators  found an increase in hair thickness . A more recent 2019 study found that of the 300 or so participants who followed a specific massage regimen, nearly 70% reported  improved hair thickness at the end .  
2. Check your cleansing routine 
Let’s make it clear: Cleansing the scalp is non-negotiable. And no, dry shampoo doesn’t cut it here. “Implementing a proper shampooing regimen is a game changer for scalp and hair loss,” Hill says. But cleansing the scalp and hair doesn’t always have to be done with a detergent. “Simple rinsing under a shower head can be considered a gentle cleanse and apple cider-based rinses and co-washes are a great alternative.” 
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3. Visit a trichologist 
If you’re concerned about hair loss or just want to inquire about the overall health of your hair and scalp, consider booking a consultation with a local trichologist. Hill says you can have your blood panel reviewed by a trichologist that specializes in scalp and hair to review your file through a “trichological” lens. This can help identify any underlying root causes that may impact your hair growth.
4. Experiment with hair growth products
You may be wondering if haircare products that promise longer, stronger, faster-growing hair actually do work and the short answer is, yes. “Hair growth products are mainly androgen blockers with active ingredients that trick the body into extending the growing phase of the hair cycle,” Hill says. “There are clinical and scientific studies that show these topicals and internal dietary supplements to work.” Even though they are not technically growing your hair, they are preserving the integrity of the hair follicle and encouraging it to mimic the growing phase for longer. 
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Hair is made of the protein keratin , which has an amino acid profile including cysteine, serine, glutamic acid, glycine, and proline. Both  collagen  and  biotin  supplements have high amounts of many of these amino acids, meaning the supplements provide the body with the building blocks of hair.* Research backs this up, too, as  studies show taking these supplements supported hair growth .*
The bottom line 
If your body, hair and scalp are healthy, you can expect to have ¼ inch to ½ inch of hair growth per month. There is an array of factors that can impact the amount of hair growth you see, but a quick visit to a trichologist can help identify any underlying issues that may be blocking you from reaching your hair goals. 
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