With a lack of this vitamin, children develop rickets, sleep disorders, unreasonable anxiety, muscle tone decreases. Later there are deformities of the bones of the skull and chest. In adults, bone thinning, osteoporosis and periodontosis develop, premature aging and other troubles begin. Have you found these symptoms? Do not rush to take pharmacy vitamins! The best absorbed are those that we get from natural products. Where is the most vitamin D? And how to eat foods so that this vitamin is absorbed? The answers to these questions are devoted to our book. And to make it easier for readers, given not only a list of products, but also recipes of ready meals.