I follow Robert Lustig's lectures; he talked about this stuff since 2009 and it's public - https://www.youtube.com/watch?v=dBnniua6-oM . The way I interpret the advice is as follows: Eat as much whole fruit as you want (but you'll get tired of it quickly). Limit refined sugars to about 30 grams per day (soda, candy, yogurt, jam, cake, etc.; this means reading labels carefully). In theory you can go out and eat as much glucose (a.k.a. dextrose) as you want, but this sounds dumb so don't do it. Embrace eating fat; it is not the enemy. Eat fiber like vegetables. Let your body tell you when you're full (which fructose disrupts).