<p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Calibri;mso-fareast-font-family:宋体;
color:rgb(0,0,0);font-size:16.0000pt;mso-font-kerning:1.0000pt;">Hair loss can be caused by genetics, hormonal imbalance, stress, illness, or nutrient deficiency. Male and female pattern baldness are the most common types.</span></p>