RUTH CLARK, RD, MPH signing and discussing COOL THE FIRE: CURB INFLAMMATION AND BALANCE HORMONES: 28 Days To Renewed Vitality. Ruth Clark is a Registered Dietitian and Functional Nutritionist with a B.S. in Human Nutrition, a master’s degree in Public Health from Boston University and over 35+ years of experience in the health care field. For the past 25 years, Ruth has specialized in helping mid-life women who are struggling with weight, fatigue and mood to create more vitality in their lives. The book includes 10 High Impact Nutritional Strategies, over 150 delicious, healthy and healing recipes which integrate into 28 days of Mindful Menus.