Animal food is the main source of natural vitamin D, such as high-fat marine fish and fish eggs, animal liver, egg yolk, shrimp, cream and cheese. Skim milk, cod liver oil, cheese, nuts and seafood are all rich in vitamin D? Vitamin D is a nutrient element to maintain the growth and development of human bones. Especially children, usually eat more foods rich in vitamin D.

Extended data:

The role of vitamin d:

1. Slow down the decline of vision. People's vision begins to decline gradually after the age of 50, which is due to macular degeneration in aging eyes with age. Macular degeneration develops slowly, spreading from the center of the eye to the periphery, and you will see that the object is getting blurred. But the good news is that taking enough vitamin D can effectively delay the progress of macular degeneration.

2. Prevent muscle cramps (cramps). If you often cramp, you may have heard that it is caused by calcium deficiency. However, simply supplementing calcium can't effectively prevent cramps, because your body can't fully absorb these calcium.

3. Slow down weight gain. When you reach a certain age, your weight will increase year by year. As the old saying goes, money is hard to buy old and thin, but we still have ways to slow down the weight gain. Studies have proved that women over 65 who don't take enough vitamin D weigh twice as much as women over 65 who take enough vitamin D, so if you want to get old and thin, you must take enough vitamin D.

4. Relieve chronic muscle pain. Many people suffer from chronic muscle pain and chronic joint pain, and hospitals can't make a definite diagnosis and implement effective treatment. However, recent research by American researchers has proved that adequate vitamin D supplementation is beneficial to relieve these unexplained chronic pains.

References:

Baidu encyclopedia vitamin d