A randomized double-blind placebo-controlled crossover trial is conducted. 200 subjects aged above 20 years with body mass index (BMI) more than 25 kg/m2 are randomly divided into 2 groups (Group 1 and Group 2). Group 1 receives laser acupuncture therapy first while Group 2 receives sham laser acupuncture therapy first. After 12 weeks of treatment and 14 days of washout, Group 1 switch to sham laser acupuncture therapy while Group 2 switch to laser acupuncture for 12 weeks. The subjects are treated with a gallium aluminum arsenide Handylaser Trion, which is used to apply at each of the acupuncture points for 10 seconds every time, 3 times per week. The measurements of outcomes are performed in the beginning, weekly during treatment, and monthly after treatment for 3 months.