The main point of Chiang's nutritional theory is that a food's acidity is determined by the kinds and proportions of minerals it contains. Fish, meat, eggs, milk, sweet foods and fatty foods are all acidic and should be given up. Vegetables, fruits, legumes and seaweeds contain minerals such as calcium, potassium, sodium, magnesium and iron and should be eaten in abundance.
姜淑惠的營養論重點是，食物的酸鹼性取決於所含礦物質的種類與比例，含磷、氯、硫的魚肉蛋奶、甜食、油脂等都是酸性食物，應該捨棄；而含鈣、鉀、鈉、鎂、鐵等礦物質的蔬菜、水果、豆類、海藻等屬於鹼性食物，應該多多攝取。