Important food ingredients Vitamin D deficiency can lead to many physical problems. People with acute or osteoporosis, diabetes, heart-stroke, reproductive problems, polycystic ovary syndrome and physical obesity may have a deficiency of vitamins. The temperate countries have more risk of having vitamin D deficiency in their body. And due to lack of vitamin D deficiency in the temperate regions of Bangladesh, largely due to lack of awareness.80 percent of the body's total vitamin D needs to come from sunlight. We can get less than 20 percent of food items, such as pona, magur, salmon, milk and eggs. In order to get Vitamin D basically depends on sunlight.How long will the sun rise, depending on where you are staying in the world. There is no research in Bangladesh about this. However, compared to other countries' research, it can be assumed that daily sunlight is required for about 30 minutes. At least 18 percent of the body's body will have to take sunshine. The time around noon, that is, from 10am to 3pm, it may be appropriate to go to the sun. The best time to get vitamin D from sunlight during the year is that of April-September month.The sun's ultraviolet rays are most suitable for the preparation of vitamin D, when the sun is at the top near the noon. On the other hand, if the sun is tilted in the east-west sky, it can not produce adequate vitamin D which contains ultraviolet rays. It is possible to increase the risk of skin cancer, in low moist and foggy days of winter or in the temperate country, that ultraviolet rays remain in sunlight.The color of the skin affects the radiation of Vitamin D from sunlight. As dark as the color of the skin (if there is more melanin on the skin), the more barrier to accessing ultraviolet rays from sunlight. That is, the darker the color of the color, the more time it has to stay in the sun.