Does Hair Grow Faster In The Summer: Myth or Fact? The sun and heat do enhance hair growth. Human hair indeed grows faster during the summer by about 10% compared to hair growth during the colder weather.
Even the time of year can affect how fast or slow hair grows. “Hair tends to grow a little faster in summer and slower in winter,” said Dr. Alan Parks, board-certified dermatologist and founder of DermWarehouse. “An underactive thyroid can also slow down hair growth.”
How Fast Does Hair Grow? We'll cut straight to it: On average, hair grows at a rate of about half an inch per month, or six inches per year. Each hair on your head grows from an individual follicle. At the base of the follicle is the bulb from which new hair grows.
"The scalp hair grows at about 1/3 to 1/2 inch per month on average, so about four to six inches per year for the hair on your head," says Vasiloudes.
Scalp hair was reported to grow between 0.6 cm and 3.36 cm per month. The growth rate of scalp hair somewhat depends on age (hair tends to grow more slowly with age), sex, and ethnicity. Thicker hair (>60 µm) grows generally faster (11.4 mm per month) than thinner (20-30 µm) hair (7.6 mm per month).
The hair growth rate per day is about 0.3 to 0.4 mm. This means that the growth of hair per week would be about 2.1 mm. So, 'How long does hair grow in 2 weeks, if you ask, the answer would be 4.2 mm.
According to Web MD, most hair strands grow at an average rate of about 0.3 to 0.4 mm a day. Therefore hair will grow: Around 2.5 mm, or a tenth of an inch, in a week. Around half an inch in a month.
On average, hair tends to grow between 0.5 and 1.7 centimeters per month. This is equivalent to around 0.2 to 0.7 inches. This estimate comes from The Trichological Society. However, lots of different factors affect the speed of hair growth.
Hair growth is regulated by male hormones (androgens, such as testosterone and dihydrotestosterone), which are present in both men and women but in different amounts.
Consider the Weather
“The first is in July and August and the second—and more significant—is November and December into half of January.” The hair is thickest in the summer to serve as protection from the sun.
Your body produces melatonin, a hormone that helps regulate your sleep cycle and has also been shown to increase hair growth.
Styling tools and products dry up the natural essential oils of the hair, thus killing all the moisture on the scalp. A dry and unhealthy scalp causes the hair to grow slower than usual.
When to wash. Rossi generally tells his patients they should wash their hair once or twice per week. But if you've had chemical treatments that can make your hair drier — such as bleach, perms or relaxers — you might want to wash it less than once weekly to avoid breaking or brittle hair or split ends, he said.
Wax Regularly
Waxing removes the hair right from the root, as opposed to cutting it off at the surface like with shaving. This means your hair grows back slower and stays smoother longer without the irritation of stubble or abrasions. For the best results, you should keep your wax schedule consistent.
“Other than age, hair can grow slower due to health conditions, vitamin or nutrient deficiencies caused by a poor diet, stress, hormonal imbalances, certain medications and even excessive heat damage from everyday styling,” explains Pierre.
Many hair follicles stop producing new hairs. Men may start showing signs of baldness by the time they are 30 years old. Many men are nearly bald by age 60.
Essentially, the idea behind increasing hair growth is to extend the hair growth phase, or rather stop it from prematurely moving into the resting phase before falling. Your hair's maximum length depends on the length of this growth cycle and that can be anywhere between 12-42 inches.