From what I gathered in ER4YT, Dr. D. wanted A's to do it every morning to break up mucus that we tend to accumulate quite easily (especially when consuming wrong dairy or too much dairy. Also, I came to learn that lemon juice helps thin A's thick blood. I think that also came from Dr. D., but can't be certain. I read so much.
I know Dr. D. brought out that O's have thin blood naturally. I can't imagine that a daily regimen of lemon water for them would be advised.
I have been taking lemon water every day for well over a year now. Hypertension, edema, enlarged heart and cirrhosis of the liver are my excuse as to why I need it - all from obesity. Getting rid of the mucus and clearing up my repeat sinus infections was just a bonus.
My weight loss goal: 220 lbs. A 6'4" dyslexic oddball: the size of a line-backer, the silhouette of Winnie-the-Pooh.