Vitamin A is absorbed along with fat in the diet. Take it with food. Studies often use high doses of vitamin A. However, such high doses can be toxic. A doctor should monitor any high-dose therapy (any dose approaching the level of 10,000 IU for an adult, or above the recommended daily allowance for a child).
Paneth Cell Metaplasia Paneth cell metaplasia is a form of intestinal metaplasia where paneth cells are located outside the small bowel such as seen in colonic paneth cell metaplasia. This is usually seen in the setting of chronic inflammation associated with ulcerative colitis, Crohn's Colitis, diverticulitis, or radiation colitis.
Pheochromocytoma is a rare and mostly benign tumor which arises from chromaffin cells with excessive catecholamine production and secretion. Paraganglioma is a rare chromaffin cell tumour from extraadrenal symphatetic tissue and is mostly located in the abdomen. Tympanic paragangliomas are neuroendocrine neoplasms located in the middle ear and arising from chromaffin cells of the parasympathetic paraganglia.