Congrats on your hard work!
I drink A LOT of black coffee - I love it! When people ask how I take my coffee I usually joke “black as my heart!”
There are other ways of thinking but I don’t see black coffee as breaking my fast and it didn’t impede losing about 100 lbs in 18 months.
But! Mind your teeth! I thought I was fine just sipping all day long since there was no sugar or milk … but my dentist told me I should be drinking the coffee down, not sipping all day because I am just bathing my teeth in acid! I try never to let it get cold and take a drink of water afterwards. (It’s a good thing for ALL teeth but if you are unlucky like me and are prone to cavities no matter how well you brush and floss, save yourself pain and $$$ by drinking it down and following with a glass of water!)
I only have two cups in the morning of black coffee but after that it’s just water. I only drink it for the caffeine in the AM and then just drink water through the morning till 12pm. I can’t handle caffeine as much as i used to so just the two cups and that’s it, sometimes I don’t even finish it. 24 ounces.