With a lack of this vitamin, children develop rickets, sleep disturbances, unreasonable anxiety, and decreased muscle tone. Later, deformations of the bones of the skull and chest appear. In adults, bone tissue becomes thinner, osteoporosis and periodontal disease develop, premature aging and other troubles begin. Have you found these symptoms in yourself? Don't rush to take pharmacy vitamins! Those that we get from natural products are best absorbed. Where is the most vitamin D found? And how to eat foods correctly so that this vitamin is absorbed? Our book is dedicated to the answers to these questions. And to make it easier for readers, not only a list of products is given, but also recipes for ready-made dishes.