CAIE Checkpoint Science – Biology: Diet, Drugs and Disease — covers effects of malnutrition, marasmus, kwashiorkor, and obesity, dietary impacts on foetal development, treatments for starvation and obesity, drug effects including alcohol, tobacco, and non-medicinal drugs, addiction prevention and rehabilitation, major diseases like STDs, malaria, AIDS, and tuberculosis, their transmission, effects on reproductive health, and methods of prevention and treatment.