Experts have criticized french fries for being very unhealthy. According to Jonathan Bonnet, MD, in a "TIME" magazine article, "fries are nutritionally unrecognizable from a spud" because they "involve frying, salting, and removing one of the healthiest parts of the potato: the skin, where many of the nutrients and fiber are found." Kristin Kirkpatrick, RD, calls french fries "... an extremely starchy vegetable dipped in a fryer that then loads on the unhealthy fat, and what you have left is a food that has no nutritional redeeming value in it at all." David Katz, MD states that "French fries are often the super-fatty side dish to a burger—and both are often used as vehicles for things like sugar-laced ketchup and fatty mayo."