Martha Rotter struggled with stress-induced acne after moving to a new country and taking on a new job. Her first dermatologist prescribed antibiotics that cost $600 per month without success. A food allergist diagnosed allergies to soy and chicken but removing those from her diet had no effect. Through self-experimentation by carefully tracking her food intake, she discovered that cutting out dairy from her diet in December 2010 cleared up her acne by New Year's Eve. She encourages others to experiment to find their own personal triggers rather than spending money on ineffective treatments.