On average, African hair seems to grow about 4 inches per year, while Asian hair grows about 5.8 inches per year. Caucasian hair seems to grow at a rate between these two. Keep in mind that black hair will probably grow anywhere between 4 to 6 inches per year.
The study's authors describe their results: “…we found that lighter hair (blond and brown) compared to darker hair (black) is generally associated with perceptions of youth, health and attractiveness, and generally leads to more positive perceptions of relationship and parenting potential.”
Mythbusting: Braids & Hair Growth
But unfortunately, braiding hair does not speed up growth rate. Your hair grows at a rate determined by genetics, while lifestyle factors like your diet and stress levels can cause thinning and breakage.
Natural red hair is the rarest hair color in the world, only occurring in 1 to 2% of the global population. Since red hair is a recessive genetic trait, it is necessary for both parents to carry the gene, whether or not they themselves are redheaded.
Of those four, green is the rarest. It shows up in about 9% of Americans but only 2% of the world's population. Hazel/amber is the next rarest of these. Blue is the second most common and brown tops the list with 45% of the U.S. population and possibly almost 80% worldwide.
According to the study, men and women both viewed people with brunette hair color as more attractive than those with any other hue.
Blonde Hair
But this isn't the case because blonde hair is the 2nd rarest natural hair color. Only 3% of the total global population is blonde.
Hair grows slower while you are asleep then when you are awake because your heart rate slows and most of your body almost goes into a shutdown mode so the more you're awake the faster your hair is going to grow. In the morning hair grows fastest of all.
So what does a cornrow growth regimen look like? Like any protective style, you'll only reap the growth benefits of cornrows if they are properly put in, maintained and taken out. Having a proper growth routine in place will encourage thick, long luscious locks that retain the growth your hair naturally produces.
05. A Tukey test was applied to this data showing that all three hair colors differed significantly from each other. Brunette was clearly the hair color perceived as most attractive, with blonde as the second most attractive, and red as the least attractive.
Other findings from the survey
While blonde was the preferred hair color of 29.5 percent of men surveyed, 28.6 preferred black hair and fully one-third went for brown as their fave.
Too-dark hair
Severe dark hair can cast shadows on your face emphasizing lines and wrinkles. Not to mention that dark hair against a light scalp makes thinning hair more visible, further adding years to your overall look.
How often should I wash? A rule of thumb is that afro hair should be washed every 7 – 10 days, or more often if you have an active lifestyle. It is important to cleanse the scalp and hair of flakes and product build up to ensure optimum health and hair growth.
Hair grows approximately ½ inch per month, for a total of six inches in one year. This rate is an average across races. Asian hair grows slightly faster than this average, Caucasian hair grows near the average,and black hair trends to grow at or just below this average each month.
A 2005 study in the journal International Journal of Dermatology also found a difference among races in the rate of hair growth. For example, Asian hair grows the fastest, while African hair grows the slowest.
How fast does hair grow depends largely on genetics, hormones, and nutrition, however, the average hair growth cycle is a rate of 0.3 to 0.4 mm a day. Most hair strands grow at an average rate of about 0.3 to 0.4 mm a day. So, this means it may grow up to one-tenth of an inch or a little more in a week.
Black is the most common hair color worldwide.
This may come as a surprise to anyone living in the U.S., where only around 7.5% of women have black hair. But among high-population continents like Asia (4.6 billion people) and Africa (1.2 billion people), black hair color is the most common.
Being that hair contains varying levels of both pheomelanin and eumelanin, no one has 100% black hair pigments. What seems like black hair is really dark brown hair. You can test this theory by looking at naturally “black” hair in the sunlight. When you do so, you'll notice brown or reddish undertones shining through.