Calcium is an essential mineral that your body craves for a plethora of reasons: firstly, calcium contributes to normal muscle function and neurotransmission as it is required during the contraction and relaxation process. Moreover, it is the most abundant mineral in the human body meaning calcium contributes to the maintenance of normal bones and teeth. Lastly, calcium contributes to normal energy yielding metabolism (fat, carbohydrates and proteins) as well as playing a role in the process of cell division and specialisation.
Vitamin D3 is produced in your body underneath your skin as a reaction to sunlight exposure. Therefore, during winter months, or in countries of large cloud cover, the body can become deficient in this essential vitamin. Seeing as Vitamin D contributes to the normal absorption and utilisation of Calcium, you certainly want enough of this in your habitual diet.