Ordinary point: Yangshengtang, supermarkets sell higher-grade products: Tomson Bianjian and Nutrilite. In fact, natural vitamin C drugs are almost the same, and there is not much difference, mainly depending on whether individuals like domestic or imported. From a medical point of view, it is best to get vitamin C from fruits and vegetables, because long-term use of health care products, once stopped, is not good for your health.