The purpose of this study is to evaluate the efficacy of Low Level Laser and Light Therapy system configured in a novel product called the TopHat 655 system, for promoting hair growth in males and females diagnosed with androgenetic alopecia of the head.

Inclusion Criteria:

• Diagnosis of androgenetic alopecia
• Fitzpatrick Skin Phototypes I-IV
• Norwood-Hamilton IIa to V for males and Ludwig I or II for females
• Active hair loss within the last 12 months
• Willingness to refrain from using all other hair growth products or treatments
• In overall general good health as determined by the physician investigator

Exclusion Criteria:

• Photosensitivity to laser light and non-laser LED light operating at 655nms.
• Malignancy in the target treatment area
• Other forms of alopecia of the head
• Past medical history of a collagen-vascular disease, thyroid disease or other cutaneous or systemic disease that seriously effects the scalp
• Unwillingness to remove hair replacement products during the therapy sessions
• Using any medications deemed to inhibit hair growth as determined by the physician investigator