Eating one lemon will supply roughly half of the RDI of vitamin C. While many people don't jump at the opportunity to eat a lemon solo, this citrus fruit can be a great addition to a salad dressing, marinade, or even water for a refreshing drink. And eating lemons can offer more health benefits beyond the vitamin C boost. For example, if you suffer from kidney stones, drinking lemonade (made with real lemons) may offer some relief!