Vitamin D mainly exists in marine fish, animal liver, egg yolk and lean meat. In addition, fortified foods such as skimmed milk, cod liver oil, cheese, nuts and seafood, and vitamin D are also rich in vitamin D. Plant foods contain almost no vitamin D, and vitamin D mainly comes from animal foods. The source of vitamin D is slightly different from other nutrients. In addition to food sources, it can also come from its own synthesis and manufacture, but it needs more sunlight and more ultraviolet radiation.

Often bask in the sun, ensure enough ultraviolet radiation, and prevent vitamin D deficiency. Often bask in the sun, ensure enough ultraviolet radiation, and prevent vitamin D deficiency.

But remember that sunbathing is not at noon, but before 10 in the morning and after 3 pm, because there are too many harmful rays at noon.

However, it is worth noting that vitamin D should not be supplemented excessively. If the intake of vitamin D is excessive, it will accumulate too much in the body, causing symptoms of poisoning, such as loss of appetite, nausea and emaciation.