Vitamin D is a critical nutrient for human body in particular for stronger bones, muscle movements, nerve function and immune system well – being. Human skin evolved to create vitamin D when it's exposed to the sun's ultraviolet (UV) rays.
Vitamin D deficiency results from inadequate dietary intake of preformed vitamin D, malabsorption of vitamin D, or too little exposure to sunlight.
More recently, justifiable concerns about sunburns and skin cancer have prompted increasing shares of people—even at high latitudes—to do sun-blocking clothing. Unfortunately, what's good for skin protection is bad for natural vitamin D production.
Another main reason is human modern life style, which minimizes exposure to the sun, Technological revolution has dramatically changed lifestyles around the globe where most people work indoors. Even at lunch, most people drive to a restaurant or stay inside to eat.
Because of vitamin D is fat soluble vitamin, nutritional osteomalacia usually is associated with a deficient intake of food products containing fatty substances.
More studies are linking the symptom associated with many disease of civilization with vitamin D deficiency.
-Muscular weakness
-Feeling of heaviness in the legs
-Chronic musculoskeletal pain
-Fatigue or easy tiring
-Frequent infections
-Depression
The deficiency results in rickets in infants and young children and osteomalacia in adults. Adults, ages 19 to 70, require 600 IU (International Units) of Vitamin D per day. Adults ages 71 and above, require 800 IU per day.
Vitamin D Deficiency
