Baldness/ hair loss/ balding/ the missing hair problem/ grow back lost hair/ alopecia/ hair leaves our heads/ shed hairs/ phase out old hair

hereditary: pass down from generation to generation

affect up to: influence

Doctors estimate this condition may affect up to 80% of white men by their 70th birthday. 

come into play: have influence on sth

There are some environmental factors that come into play, too. 

steroid 类固醇，激素

coronary heart attack 冠心病发作

prostate problem 前列腺

hormonal imbalances 荷尔蒙失衡

temple 太阳穴

Often in men, it’ll start at the temples or in the back of the head, at the top. 

scalp line 发际线

In women, it can show up first near the front of the head, or in a widening of the scalp line, where hair becomes thinner.

chemical relaxers 化学软发剂

irritate/destroy hair follicle: 刺激/损坏毛囊

hair transplant 毛发移植

jumpstart: to make sth. work successfully, esp. after a period of failure

It can take up to eight to 12 months to really jumpstart hair growth.

be a result of: be caused by, attribute to, result from