There are various information regarding Vitamin D provided in this book; some you may have known before and others you will be surprised to hear for the first time. Basically, vitamin D is known as steroid vitamin, which is a set of prohormones that are fat-soluble. This motivates the metabolism as well as absorption of phosphorous and calcium. Persons who regularly receive normal levels of sunlight have no need for supplements of vitamin D as this sunlight enhances adequate synthesis of vitamin D in the human skin.

But why does the body require vitamin D? Research shows that this component is vital for the metabolism and absorption of the previously mentioned phosphorous and calcium which are known to have several different functions, particularly the growth and development of strong and healthy bones. In addition, various researches carried out in the area of diet and how it affects health and wellness found that the level of vitamin D that is in a person’s body when he or she starts a diet of low-calorie, will predict success in weight loss. This shows the significant role that vitamin D plays in weight loss.

Humans receive vitamin D from supplements, food and naturally from exposure to the sun. It is described as being biologically inert which has to go through two types of hydroxylation reactions before it performs any activity in the human body.