The True Purpose of Nutrition, a talk by Dr. Robert Lustig 

I agree!... quitting meat is much easier than quitting sugar!!

@@daytime12 I'm not sure I follow you. There are many good reasons to quit sugar, but I don't see any good reasons to quit meat?

@@aivkara pardons! I'll clarify. I agree with your comment about Lustig being a fount of knowledge. Me, cutting out sugar for 3 weeks caused my waist to decrease an inch or more and possibly other health benefits, I'll have to see. I found that quitting sugar was much more difficult than quitting meat ( to my surprise) I quit meat to see if it would give me a competitive edge in cycling. I quit meet for 7 years while cycling 125 miles a week and in the weight room doing 3 10 or 15 reps of 650 lbs on the leg press, also managed a 45.6 mph cycling sprint, on a Los Angeles highway all while not eating meat... None! Today I sparingly eat meat and fish... But when I did not eat meat I noticed 3 things. 1. No big difference in athletic output. 2. My bowel movement smell was much more mild. 3. My food bill for the month decreased.

I'm nowhere near as active as you are, granted, but think about the mechanisms involved here. If quitting a substance is difficult, that probably means it is addictive, at least that's how I view it. Are you in ketosis?, at least partially, while doing this level of exercise?

Check out an interview with Dr. Anthony Chafeee and a guy who did five marathons on five consecutive days, while in a fasting state. I will find the name shortly and post it, but consider what he is saying