My husband used to suffer from recurrent stress fractures in his shins. This turned out to be a nutritional deficiency in zinc, vitamin D and certain amino acids (also causing low hormones) due to his undiagnosed gluten intolerance. He was as stunned as I was at our reactions to the challenges following the elimination diet and now actively avoids additives and gluten as he has experienced how they affect his well-being. If not for the diet, he would still be an incredibly frustrated sportsman sitting out the remainder of the season after his shins flared up yet again. – by email, Qld