biotin
It is because You are being hygienic and active which makes your hair healthy and makes it grow.
Yes broccoli makes your hair grow
no i don't think braiding your hair makes it grow faster i know mine grows the same no matter what
No
Eating lots of protein makes hair grow faster and makes it healthier and stronger. The reason for this is that hair is made of protein.
The Hair Cells :P
calcium
NO
no
Because hot air makes heat and makes you hair darker , so cool and cold air makes your hair cooler and grow fast to get you warm for next winter
fish oil helps it grow faster, but it also makes your hair everywhere else grow
Plant oils in general help increase hair growth. How much it makes hair grow varies from person to person.