In summer heat, think “cool as a cucumber.” Really.

The phrase comes from this plant’s ancient history of medicinal applications and its perceived ability to cool the blood and reduce inflammation. As it happens, the cucumber does have both soothing and anti-inflammatory properties among many other attributes.

First, it’s technically a fruit, not a vegetable. While most of us recognize the elongated dark green tube, there are hundreds of varieties in which you’ll find orange, yellow or white cucumbers in various shapes and sizes—even round. For all of the varieties, there are, for the most part, only two types grown commercially: “slicing” and “pickling,” both green.

It is believed to have originated in the wilds of India at least 5,000 years ago, then moved to the Mediterranean (where it probably got its name.) The Romans loved them as both food and medicine. Emperor Tiberius insisted on eating one per day, so greenhouses were built to accommodate his request in the winter. Christopher Columbus brought them to Haiti for Spanish settlers, and, by that time cukes had reached the UK, and English settlers brought them over here. The French, from Canada, introduced cucumbers to Native American tribes in the Great Plains and Rockies of what is now the US.

At more than 90% water, it’s hard to believe that cucumbers are so full of health benefits, but here are a few that will have you slicing and dicing right away. And make sure you eat the seeds and skin—the nutrients are concentrated here.

Compounds called lignans have been found in cukes. In a nutshell, they reduce the risk of heart disease and cancer and have been found to inhibit the growth of some cancer cells.
Not only can snacking on cucumbers curb hunger, but they also fight bad breath. Try holding a slice on the roof of your mouth for 30 seconds to freshen up.
Cucumbers are a traditional hangover cure, too. Munch on a few slices after a night out for the B vitamins and electrolytes plus the hydration, and you’ll wake up without the headache.

Have a bumper crop of cukes to get through? Start eating healthier tonight with this easy, tasty recipe for Cucumber and Grilled Pineapple Salad with Fresh Basil from Martha Stewart. (Click here for more of her awesome cucumber recipes—you’ll want to buy more plants next year!)