Vitamin E is best taken in the process of eating, while vitamin C is generally recommended to be taken after meals. Vitamin E is a fat-soluble vitamin, which can be dissolved in fat. In the process of eating, it will contain some fatty nutrients, and vitamin E will be dissolved in it to accelerate the absorption of vitamin E, which is beneficial to the body. Vitamin C is a water-soluble vitamin, which is relatively easy to metabolize. Taking it before a meal will speed up gastric emptying and prompt its excretion from urine, reducing absorption efficiency. Post-meal will delay gastric emptying, which can increase the time of utilization by the body. In addition, vitamin E is generally recommended once a day because fat-soluble vitamins are not metabolized out of the urine. However, vitamin C is generally recommended to be taken orally several times a day. Normal people can maintain adequate vitamin intake if they ensure a balanced diet, and there is no need to add extra. Some vegetables, fruits and nuts, including some vegetable oils, are rich in vitamin C and vitamin E. If needed, it is best to take them orally under the guidance of a doctor.