In an age of extremes and absolutes, vitamin A serves as a potent example of the necessity of balance in diet and nutrition. This is an important vitamin that has a direct effect on vision, the endocrine system in many ways and gene expression modulation. A deficiency can lead to blindness, skin lesions, reproductive issues and pneumonia, while an excess may result in anorexia, diarrhea, bone deformities and cancer. So, a more-is-better approach is as detrimental as having none at all.
In other words, achieving just the right amount is all important, especially considering that vitamin A is derived solely from the diet. That puts the full responsibility for getting it right squarely on our shoulders.
