Wikipedia writes that turmeric is a plant of the ginger family, which is grown for its rhizomes. "It is native to southern Asia, requiring temperatures between 20 and 30 °C (68 and 86 °F) and a considerable amount of annual rainfall to thrive." You can use the rhizomes fresh, like you would use ginger; or you can use them boiled and dried.
I plan to use a juicer to juice some turmeric just for general health purposes (not for a sick person).
Some recipes, like this one, recommend to process it unpeeled.
I'm just curious whether there is any nutritional value or beneficial substances (antioxidants, etc) in the skin part that could be good for human health?