Thread gives me pause to think about it all (looooong divorced 56 year-old internist here), on any given work day in recent years:
05.00: wake up, 20-ish ounces of cold water from fridge, banana
05.25: ~20 minute run on treadmill (addictive when you really get used to doing it), shower up
05.50: every day: 3 breakfast tacos (scrambled eggs, salsa, cheese, flour tortillas, guacamole) or bowl of hot cinnamon oatmeal, orange or apple
06.30: at hospital for pre-rounds
06.55: 20 ounces bottled water, orange or apple
10.00: 20 ounces bottle of berry juice, 2-4 ounces salted peanuts and cashews (if possible due to schedule)
13.00: 20 ounces bottled water or the berry juice; big sandwich (eaten at my desk, ingredients from my well stocked office refrigerator and small pantry: Whole Foods deli ham, chicken, or turkey, cheese, lettuce, tomato, mayo, and pickles) or a big bowl of gumbo/soup that I got at Whole Foods and some crackers (mmm... gumbo)
16.00: 16 ounces bottled iced tea, 2-4 ounces peanut butter crackers, another banana (if possible due to schedule)
18:00 back at hospital for evening rounds, hand-offs
19.45: never eat dinner at home; bowl of chili con carne or BBQ at nearby joint, or enchilada plate #5 at local Mexican food eatery, or at the nearby Whole Foods buffet/food counter: roasted chicken, salmon, or beef, some green vegetables, a starch, and bottled iced tea or bottled sparkling water
(I rarely eat any type of desert or candies. And without any exception, I never drink alcohol unless I KNOW that I will not have any official medical duties for at least 24 hours.)