full of zest.
the zest is the outermost skin of the lemon. it has a zingy citrus flavor without being bitter. (breaking into the white pith just below will bring out the bitterness.) citrus peels contain d-limonene, a naturally occurring chemical that provides the characteristic flavor and fragrance. taking limonene as a supplement has been shown to reduce heartburn. everydayhealth.com
in the lab, compounds from this zingy root can shut down parts of the inflammation process and bring down the swelling from arthritis -- in test tubes and rats. in the real world, cooking with fresh or dried ginger can liven up your meals. there's little evidence that it would limber up your stiff, aching joints. medicinenet.com