There are 249 calories in a 3.5 oz serving of Ground beef Ground Beef, crumbled, cooked, drained, rinsed. Calorie breakdown: 57% fat, 0% carbs, 43% protein.here are 249 calories in a 3.5 oz serving of Ground beef Ground Beef, crumbled, cooked, drained, rinsed. Calorie breakdown: 57% fat, 0% carbs, 43% protein.
Sunlight and Vitamin D Synthesis. Exposure to the sunâs ultraviolet (UV) rays is required for vitamin D3 (cholecalciferol) to be produced. Vitamin D3 is synthesized in the skin once your unprotected skin receives exposure to sunlights UV rays. The sun emits three different types of radiation, UVA, UVB and UVC. The ozone layer is good at blocking all of the UVC radiation and most of the UVB, however, none of the UVA radiation.
Overview. Vitamin D, a fat-soluble vitamin, helps the body absorb and metabolize calcium and phosphorus. It is also involved in neuromuscular function. Sunlight synthesizes vitamin D in the skin and is obtained through diet. Evidence indicates that a low vitamin D level in men poses adverse effects on overall health.itamin D, a fat-soluble vitamin, helps the body absorb and metabolize calcium and phosphorus. It is also involved in neuromuscular function. Sunlight synthesizes vitamin D in the skin and is obtained through diet.