Asian hair, usually smooth and brown to black in color, grows perpendicular to the scalp. It has the fastest growth rate with about 1.4 centimeters per month. Asian hair has a rather round and uniform shape.
Several factors, including age, genetics, and gender, can influence how fast hair grows: For example, studies show that male hair tends to grow faster than female hair, while natural, textured hair tends to grow slower than other hair types.
Of all the hair types, coily hair is seemingly the slowest to grow. That's because it has the densest structure of all and is prone to shrinkage, which can make even the fastest-growing of locks look like they haven't budged.
The fact of the matter is that curly hair takes a longer time to grow longer because it grows in a curl, rather than straight down. But curly hair, as well as straight hair, usually grows about 1/2” per month. So with patience, and with a coordinated plan with your hair stylist, you can have longer hair.
Hair length is longest in people with round follicles because round follicles seem to grip the hair better. So, people with straight hair have the potential to grow it longer. Shorter hair is associated with flat follicles.
Curly hair is a bit more delicate than straight hair, and the tighter the curl or coil, the more fragile the strand. Curls generally need a little extra love, and it's important to know how to do right by your hair so it can stay looking amazing.
How long does hair grow in 2 weeks? On average, hair grows about half an inch per month. So, in two weeks, you can expect your hair to grow about one-quarter of an inch or half a centimetre every two weeks.
Human hair comes with all sorts of colors, textures and shapes. Notably, African hair is more coiled and dry; Asian hair is straighter and thicker; and Caucasian hair is somewhere in between with around 45% having straight hair, 40% having wavy hair, and 15% having curly hair.
Less than 20% of people have naturally curly hair.
Like all type 2 hair, 2c hair is wavy, but that often feels like a technicality. Your S-bend hair is thick and the waves start at the roots. If you've ever been confused about whether your hair is wavy or curly, it's likely you have the 2c hair type.
Black hair follicles have an elliptical shape that grow in a spiral and results in the slowest growth rate, at only about a third of an inch per month.
Thick (Coarse)
Thick or coarse hair texture is the strongest hair texture and typically feels coarse or thick to the touch. Coarse hair contains all three hair layers – the cortex, cuticle and medulla.
Age: Hair grows fastest between the ages of 15 and 30, before slowing down. Some follicles stop working altogether as people get older. This is why some people get thinner hair or go bald.
Asian hair shows the fastest growth rate in comparison to the other two hair types. African hair has the lowest growth rate. Hair growth rate and hair diameter were reported to be associated with cuticle interscale distance.
Hair type 1A is super-straight. It doesn't even hold a curl! 1A is the rarest hair type. It is usually found on people of Asian descent.
Many Asians have naturally straight hair, but there is a significant group of us who do have naturally curly or wavy hair! However, because it's the norm to see straight and sleek hair, curly haired boys and girls tend to think that their hair is some kind of unruly straight hair that isn't behaving.
Individuals of African ancestry, for example, are more likely to have curly hair due to the oval shape of their hair follicles. Additionally, the Keratin Associated Protein (KAP) cluster genes, responsible for the structure of keratin fibers, have been found to have variations in many African populations.
TIL The rarest natural hair color in the world is red, with only 1-2% of the world population having natural red hair. Second is blond, with 3%, then brown/brunette, with 11%, and finally black with… You learn something new every day; what did you learn today?
The rarest natural hair colour is red, which makes up only one to two percent of the global population. You commonly see these hair colours in western and northern areas of Europe, especially Scotland and Ireland. However, natural redheads may not exist for much longer.
The African hair is generally curly or frizzy, and grows almost parallel to the scalp. It has the slowest growth rate of 0.9 centimeters per month due to its spiral structure which causes it to twist on itself as it grows. African hair has a flattened shape.
Your body produces melatonin, a hormone that helps regulate your sleep cycle and has also been shown to increase hair growth.
But since your metabolism slows down at night, so does your hair growth, explains Waldman. Goddard adds that the primetime hair growing hours are between 10-11 a.m. and 2-4 p.m.