Optimizing Parameters for Long-pulsed Nd:YAG Laser for Reducing Hair Shaft Diameter

Inclusion Criteria: * Men and women, aged 25-60 years with AGA or healthy * Completed informed consent form Exclusion Criteria: * Pregnancy or breastfeeding * Acute infection on the scalp or any systemic infection * Immunocompromised host * Chronic wasting diseases * Use of any medications which may affect hair loss such as anticoagulants, anti-hypertensive, hormones, anticonvulsants, retinoid, mood stabilizers and antidepressants * Unstable medical problems which may affect hair loss such as thyroid diseases, autoimmune diseases, myocardial infarction, coronary bypass surgery, unstable angina, cardiac arrhythmias, congestive heart failure, cerebrovascular accident and psychiatric problems * Hair thinning at the occipital area