like that let's take a look 1st at vitamin d. it's a supplement which doctors usually prescribe over here in germany it's good against osteoporosis it's good for the moon system but some skepticism is appropriate. we've come to dr doris wine hearts practice in recent years more and more of the g.p.'s patients have been asking her about vitamin d. . this is evidence that make patients suspect that they have a vitamin d. deficiency our tiredness and fatigue are feeling a bit low that makes things a little difficult because these nonspecific complaints could be symptoms of many illnesses. including. the body makes women deal itself with the help of sunlight which triggers the formation of the vitamin in the skin liver and kidneys the vitamin promotes the uptake of calcium which helps the growth and maintenance of strong bones and muscle growth back in 1900 doctors discovered that corny