Well, over a year ago when I started my program I replaced my coffee with tea on weekdays and only had coffee on weekends mornings. I did not do it based on scientific data, I did it 'cause my body told me so. Now I still prefer tea over coffee, but sometimes I have a latte (espresso in it) to replace my lunch and I love it. I cut my weight from 154# to 145#. So final conclusion for me is-Follow your Bliss.
It has an edge over logic.
Paradoxically we also need scientific data and research and Lotus is very good at it.