When lacking nutrients, it is recommended to increase the intake of foods rich in high-quality protein, vitamins, minerals, and other nutrients in moderation, mainly including eggs, milk, lean meat, dark vegetables, whole grains, etc. Long term malnutrition may lead to weakened immunity, anemia, and other problems, and dietary structure needs to be adjusted according to individual circumstances.

1. Eggs
Eggs are a typical source of high-quality protein, containing all the essential amino acids needed by the human body, with high bioavailability. Egg yolks are rich in lecithin, vitamin A, vitamin D, and B vitamins, making them suitable for consumption by children during their growth and development period, pregnant women, and the weak. It is recommended to consume 1-2 eggs per day, boiled or steamed eggs are more conducive to nutrient retention. People who are allergic to eggs should avoid consumption.
2. Milk
Milk provides rich calcium and whey protein, which helps with bone health and muscle repair. Every 100 milliliters of milk contains about 3 grams of protein, as well as trace nutrients such as vitamin B2 and vitamin B12. People with lactose intolerance can choose yogurt or low lactose milk, and it is recommended to drink 300-500 milliliters per day to avoid gastrointestinal discomfort caused by drinking on an empty stomach.
III. Lean Meat
Lean meat such as beef and chicken breast are rich in heme iron and zinc elements, which can improve iron deficiency anemia and enhance immune function. The protein digestion and absorption rate in meat exceeds 90%. It is recommended to use low-temperature cooking methods such as steaming and stewing, and consume 300-500 grams per week. Gout patients need to control visceral intake from animals with high purine levels.

4. Dark Vegetables
Dark vegetables such as spinach and broccoli contain a large amount of folate, vitamin K, and dietary fiber. Spinach has a particularly prominent folate content, which helps prevent megaloblastic anemia. It is recommended to consume 300-500 grams of vegetables per day, and stir frying or cold mixing over high heat can reduce the loss of water-soluble vitamins. Individuals with renal insufficiency should pay attention to controlling their intake of high potassium vegetables.
Fifth, Whole Grains
Whole grains such as oats and brown rice retain the germ and bran, and are rich in B vitamins and magnesium elements. Its dietary fiber content is 3-4 times that of refined grains, which helps improve the balance of gut microbiota. One third of the daily staple food can be replaced with whole grains, soaked and then cooked to improve digestion and absorption rate. People with weak gastrointestinal function should gradually increase their intake.

Nutritional supplementation should follow the principle of gradual progress, as sudden large intake of a single food may increase digestive burden. It is recommended to adopt a small quantity and multiple meals approach, dispersing high nutrient density foods into each meal. At the same time, pay attention to dietary diversification, consume more than 12 types of food per day, and reach more than 25 types per week. Reduce frying during cooking and use steaming to retain nutrients. For individuals with obvious symptoms of malnutrition or special diseases, they should supplement with nutritional supplements under the guidance of a doctor, and regularly monitor indicators such as serum albumin and hemoglobin. Maintaining moderate exercise can help improve nutrient utilization, and it is recommended to engage in 150 minutes of moderate intensity aerobic activity per week.
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