How can I grow my hair longer?

I was recently asked how do you get your hair grow longer?  Hmm…this is not a straightforward question as it largely depends on two factors   The length of your hair cycle: Your hair grows in a continuous growing/shedding phase which can be anywhere between 5 and 8 years…basically the longer your hair cycle the longer your hair! This is largely determined by genetics…if you haven’t got the ‘long hair gene’ you wont grow hair down to your waist! The other variable is…the speed that your hair grows, which can vary between 0.7mm and 12mm per month. One times by the other gives you the optimum length that your hair could potentially grow too of the growing phase of your hair cycle that determines the length of your hair.   E.g.: Person ‘a’ hair grows at 1cm per month and has a growth phase of 5 years = 60cm Person ‘b’ hair grows at 1.2 cm per month and has a growth phase of 7 years = 100.8 cm Certain genetic types have longer hair growth phases (Asian people have generally longer growth phases) But…health problems and the aging process could affect both of these factors in general. Lack of certain vitamins, minerals or amino acids may cause the hair cycle to shrink, and so not grow for as long.   The hair is the 2nd fastest growing cell in the body and so needs a lot of nutrition for it to function correctly, unfortunately the body classes hair as ‘non-essential’ and so will always be at the back of the queue when it comes to getting the essential...