Do middle-aged and elderly people need to supplement vitamin D at the same time when supplementing calcium?

Whether to take vitamin D is an important issue in calcium supplementation. Vitamin D is a vitamin that promotes calcium absorption and calcium deposition to bones. How much vitamin d does the human body need? Are calcium-deficient people also short of vitamin D? Experts believe that before 18 years old, you need to take in D400 units of vitamin D every day. Except pregnant women and nursing mothers, the average adult needs D200 units of vitamin D every day. Usually, there are two ways for us to obtain vitamin D: one is to synthesize vitamin D by ourselves, and the skin can synthesize vitamin D by itself after being irradiated by sunlight and ultraviolet rays. Generally speaking, vitamin D synthesized by skin can meet the needs of human body after outdoor activities in the sun for 2 hours. Second, through food intake, fish, shrimp, milk, egg yolk and animal liver are all foods rich in vitamin D. You can check the "Table of Nutritional Components of Foods" at the back of this book in detail. Nutritionists believe that, generally speaking, vitamin D is not easy to be deficient except for people who are partial to food or have too little outdoor activities. In addition, vitamin D is often added to many calcium preparations and dairy products. Therefore, middle-aged and elderly people do not need to supplement vitamin D regularly while supplementing calcium. For those vegetarians and people who have little outdoor activities and are likely to lack vitamin D, you can take cod liver oil appropriately, and it is best to supplement it in small doses under the guidance of a doctor to avoid poisoning caused by excessive vitamin D. What does natural wild Ganoderma look like? What does wild ganoderma lucidum eat? How to preserve and take orally wild Ganoderma lucidum after discovery? Why is it recommended to drink water to cultivate Ganoderma lucidum? The rapid growth of wild Ganoderma lucidum in Tai sui is misleading by TV stations.