What is the fine-grained topic of the following text: My passion and main speciality is Chronic fatigue and gastrointestinal problems, but i also specialise in the following areas: Functional diagnostic testing, Functional medicine, Sports performance nutrition, heart disease, chronic illness, fertility and infertility support, pregnancy / antenatal care, young athletes, nutritional cosmetics, weight loss and body composition optimisation (using world renowned Biosignature Modulation programme developed by Charles Poliquin). Only return the topic.
Specializations in Chronic Fatigue and Gastrointestinal Problems and Other Areas of Health and Nutrition