Latest studies do confirm that aged men and women (specifically senior citizens) containing levels of vitamin D in their blood have a greater tendency to get depressed in the end. You may disagree but eminent researchers are confident of the study.
There have been several views regarding depression and the most popular is that it is a mental state characterized by a pessimistic sense of inadequacy and a despondent lack of activity. But this is not our focus at the moment.
Vitamin D is basically a fat-soluble vitamin that prevents rickets and generated by the body when on earth skin is exposed to sunlight. Well, it is found in foods like oily fish as well and does assist cells absorb calcium and is important for bone health. Low vitamin D levels, it is essential to mention, have been connected to heart disease, stroke, high blood pressure, and severe asthma to a greater degree or extent.