i stopped having sugar in tea and coffee decades ago, but i do have sugar in coffee in a cafe because i find the taste too strong.
I also stopped having butter or margarine on bread years ago, after i read an article by a famous heart surgeon in S Africa, what it does to your arteries.
Good points, i need to rein in tucking into cake & biscuits during the daytime, before my beer belly turns into a keg.
I find a 30 min exercise or a brisk 1hr wslk clears the brain.