The A, D, E, K of vitamin deficiencies

Vitamins A, D, E and K are fat-soluble vitamins. Knowledge of their physiological function provides a better understanding of the effects and risk factors for deficiency when considering which vitamin supplements are appropriate for a particular patient, writes Chrysa Giannellis. Chrysa Giannellis is a consultant pharmacist and managing director of Hummingbird Pharmaceutical Consulting. Learning Objectives