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Susan Lark is a medical doctor. She obtained her education from Northwestern Medical School and has served as one of the clinical faculty members at Stanford University.^[1] At Stanford University, she taught in the department of family and community medicine.^[2]

Lark is the founder and director of the Menopause Self Help Center located in Los Altos, California.^{[citation needed]} She believes that maintaining a slightly alkaline body pH will lead to the prevention of diseases such as osteoporosis. Susan Lark is developing nutritional supplements^[3] for women's health.^[1] Her most recent book is Hormone Revolution; it was written with Kimberly S. Day.

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