Vitamin D is a fat-soluble vitamin that plays an important role in the body. Vitamin D is mainly found in animal foods such as liver and egg yolk of fish (such as cod liver oil preparations) In 2015, vitamin D deficiency rates in adults aged 18 and over in China were 21.4%.
Vitamin D deficiency can affect bone calcification, resulting in mineral abnormalities in bones and teeth. Excessive vitamin D supplementation is not good for health. Spend 9-10 minutes in the sun every day.