Who doesn't like lemonade, and the bright, fresh flavor lemons add to so many dishes? As for the vitamins and minerals, lemons come with infection-fighting vitamin C, as well as thiamin, riboflavin, pantothenic acid, iron, and magnesium, fiber, lots of B vitamins, calcium, potassium, copper, folate, and potassium.Whew!ho doesn't like lemonade, and the bright, fresh flavor lemons add to so many dishes? As for the vitamins and minerals, lemons come with infection-fighting vitamin C, as well as thiamin, riboflavin, pantothenic acid, iron, and magnesium, fiber, lots of B vitamins, calcium, potassium, copper, folate, and potassium.