The science bit...
It's pretty common to lose hair
when dieting. Here's why...
on your head grows for 4-5 years, then falls out. So your hair
is always renewing itself. The long growth stage is called anagen
and the short stopping phase that follows is called catagen
. Then the hair
falls out, which is telogen
. The hair
follicle then goes back into anagen
and makes a long hair
for the next 4-5 yaers.
What happens during weight loss
is Telogen effluvium
. It also happens after any stress to the body. Some of your hair
follicles go into catagen
to conserve body resources. So the hairs stop growing and "rest". Once your body feels safe again, those hairs go back into anagen
- but because there was the pause in the middle, the brand new growing hair
pushes the old hair
out of the follicle. So in reality you have just as much hair
as you did before - and it's probably far healthier hair
. But the new hairs are short :)
Normally around 10% of your head of hair
is in the catagen
phase, in essence resetting itself to prepare for new hair
to grow in. Because you have so much hair
on your head, you don't even notice. During weight loss
that percentage gets higher, but this is only temporary. Your body starts creating new hair
in its normal cycle
once it settles into a healthy weight and those hairs start growing again. Remember that hair
doesn't reach a long state overnight! So all those new, healthy hairs need time to grow out to whatever length of hair
you have chosen.
Usually it takes 6 months for your head of hair
to have grown back out to typical fullness. Hair
grows around 1/2" per month, so at the 6 month mark, the hair
is around 3" long which is enough to seem thick on most heads. Again, it's not that the hair
is MISSING during this intermediate time. It's just that it is brand new and growing from scratch.
Copied from here Weight Loss, HairLoss and Low Carb - Low Carb
if you want to read the whole article!