Are you exhausted, tired, tense or unable to sleep through? Then it is likely that you have too little vitamin D. In this book, we consciously focus on vitamin D, how it is formed and needed, and what you can do if it is deficient. If you have little vitamin D, it is obvious to go to the sun from time to time after taking a short break from the office. Instead of a power nap, you can also take a walk in the sunshine to get vitamin D. Other or additional possibilities are, to go to the solarium with the newest quality standard, nutritional change or in our latitudes, the intake of a supplement with vitamin D can also be useful. Do you want more quality of life? Then you are at right way...