Dr Casey Means is the co-founder and Chief Medical Officer of Levels Health, a med tech company that provides closed-loop continuous glucose monitoring to help people optimize their diets and so much more. As Dr Means points out, eating the right food isn't sufficient. Whether a particular whole, plant food – say, a banana, a sweet potato, or bunch of grapes – will spike your glucose to a dangerously high level depends also on the time of day, what you're paring it with, your level of stress at that moment, how active you are physically, any environmental toxins that might be disrupting your metabolism, and the state of your microbiome. Levels Health's monitor is the size of a stack of two quarters, attaches to the back of your upper arm, and tells your smartphone about your glucose level and heart rate every 15 minutes. With this information, you can literally see how different foods and activities affect your blood sugar levels. And blood sugar levels are highly predictive of lo...