There are three basic components of lifestyle modifications: diet, exercise, and behavior therapy. Diet plays a major role in lifestyle modifications. By adopting a proper diet you can reduce your insulin resistance, fat mass, responsible for most of the diseases. A healthy diet also helps reduce the symptoms of some hormonal disorders, including PCOS/PCOD, hyperthyroidism, and hypothyroidism, childhood obesity, snoring, obstructive sleep apnea, metabolic syndrome, etc.