AFTER learning he was overweight during a visit to his doctor, John-David Malta embarked on a 10-month battle to trim down. Eight months later, after not losing weight, John-David asked to be referred to a dietitian at his doctor’s clinic. Together, they discussed a range of food-related health issues, including how John-David could make healthier food choices and limit portion sizes. Gaining valuable health information: Two months after speaking with registered dietitian Kari Derbyshire, …