In my opinion, parents' most expensive nutrition is not necessarily good, so we must consider the actual situation. For example: what is the physical condition of parents? It is best to buy nutrients according to your physical needs.
If they have osteoporosis, they can buy some nutritional supplements to supplement calcium and zinc. If your hands and feet are numb, you can buy nutrients such as gastrodia elata. If it is ischemic, you can buy blood-enriching nutrients. People who are weak can buy ginseng to nourish them.
It's best to take your parents to the hospital for a comprehensive examination before consulting a doctor. It will be better to buy nutrition for parents according to the doctor's instructions.