Most of the time, malnutrition may be the body lack of vitamins, or high-quality protein and so on, but our body needs the seven nutrients: minerals, lipids, proteins, vitamins, carbohydrates, water and dietary fiber, these should be balanced in order to be the body does not lack of nutrients. You have to figure out which of these seven nutrients are mainly at fault first, and then target them for supplementation. If there are still any questions, you can continue to ask. You can give you a more detailed account.