Most of us are confused about the ideal combination of proteins, carbohydrates and fats in the diet for promoting muscle mass and minimizing fat. It seems as though every week we see a new study that provides contradictory information. Just when you thought you were totally confused about the ideal muscle-building diet, scientists from Tufts University muddied the water even more. They found that high acid diets might cause muscle wasting. Protein and cereal grains produce acid such as sulfuric acid, while fruit and vegetables generate alkaline chemicals such as potassium and bicarbonate. Older adults who consumed more grains and meat and fewer fruits and vegetables had lower levels of potassium less muscle mass. Those eating more fruits and vegetables had had the highest levels of lean body mass (fat-free weight). We don’t know if these results apply to young, healthy weight trainers, but eating plenty of fruits and vegetables is an important part of a healthy lifestyle. (American Journal Clinical Nutrition, 87: 662-665, 2008)