Vitamin A toxicity (also called Hypervitaminosis A) might be one of the reasons eating "too healthily" might actually make you sick. Vitamin A is considered by nutrition science as one of the fat-soluble vitamins along with vitamin D (actually a hormone), vitamin E, and vitamin K. Excess fat soluble vitamins like vitamin A are shuttled to tissue for storage, whereas excess water-soluble vitamins get excreted in urine. Certain groups of people should be extra cautious about getting too much vitam