![]() ![]() (3) The inactive forms of vitamin D are transported to the liver, where (4) they are converted to 25-hydroxyvitamin D3. (2) Vitamins D 2 and D 3 are also obtained through diet.Figure 1 - Vitamin D synthesis: (1) UV light from the sun converts pro-vitamin D in the skin to pre-vitamin D 3.Now, vitamins D 3 and D 2 are not the active forms of vitamin D, and they undergo chemical changes in the liver and kidneys ( Figure 1) to create the active form of vitamin D. ![]() In contrast, foods from plant sources, like mushrooms, contain vitamin D 2 2. Foods from animal sources, such as the flesh of fatty fish (trout, salmon, tuna, and mackerel), fish liver oils, beef liver, egg yolks, and cheese, usually contain vitamin D 3. This reaction is our main source of vitamin D-foods and dietary supplements are less important sources. The light from the sun converts pro-vitamin D into an intermediate substance called pre-vitamin D, which is then converted into vitamin D 3. The cells in the top layer of the skin, called epidermal cells, contain a compound called pro-vitamin D. Sunlight is the prime source of vitamin D. Vitamin D has two slightly different types, called vitamin D 2 and vitamin D 3. The most beneficial micronutrient, sometimes called the “sunshine vitamin,” is a fat-soluble vitamin: vitamin D. Why Is Vitamin D Called the “Sunshine Vitamin?” Therefore, it is necessary to eat a balanced diet, because one vitamin cannot make up for the shortage of another. Each vitamin performs a unique function in the body. On the other hand, the liver and fatty tissues store any excess fat-soluble vitamins for future use 1. Our bodies will not retain water-soluble vitamins, meaning that if we get more than we need, we will excrete the excess in urine so, it is necessary to get water-soluble vitamins regularly through our diets. Meanwhile, vitamins A, D, E, and K fall under fat-soluble vitamins. Water-soluble vitamins include vitamins B1, B2, B3, B5, B6, B7, B9, B12, and C. As their names suggest, water-soluble vitamins are those can dissolve in water, and fat-soluble vitamins are those that can dissolve in fat. Vitamins can be sorted into two types: water-soluble vitamins and fat-soluble vitamins. There are 13 essential vitamins that our bodies require. Usually, our bodies do not synthesize micronutrients, so we need to get them from our diets. Micronutrients are nutrients that are essential in small amounts for the normal functioning of the human body. ![]() In this article, we explain how our bodies make vitamin D, which is also called the “sunshine vitamin.” We will also explain the important roles vitamin D plays in humans, such as helping the immune system, regulating our hormones, and keeping the bones, heart, and brain healthy. Nature, particularly the sun, helps our bodies to make one of the vital nutrients, vitamin D, which keeps our bodies healthy. Two of these ways involve the sun and the healthy foods that we eat. Human health is connected to nature in many ways. ![]()
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