High-fat keto diets are super trendy right now, but that doesn't mean they're easy. Or cheap.<br />Kinesiologist and cancer researcher David Harper has been on a high-fat ketogenic diet for six years, along with his wife Dale Drewery.<br />According to Business Insider, they like how it makes them feel, but they have to cook most of their meals at home.<br />They also grocery shop almost every day, since their diet relies heavily on fresh produce and animal products. <br />
