Nope. There will be no insulin release if you aren't ingesting at least 9 g of carbs IIRC, so coffee or tea, etc (and heavy cream) are fine.
Pretty simple, I did find one thread here with really no definite answer. I don't really understand the nature of fasting, for proper execution my understanding is drink water, zero calories in, no solid food as that sparks up digestion and you're defeating the purpose. A close Paleo friend of mine is trying to convince me that coffee, tea, and low-calorie drinks like them are fine while fasting.
To save you some time on google, an 8-oz cup of brewed coffee is roughly 2 calories, a combination of fat and protein, with ~95mg of caffeine, depending on your brewing technique and roast. I like to drink roughly 3-4 6-oz cups over the course of two hours.
Will drinking my day's worth of coffee (~6 calories worth) break my 24 hour IF?
Tell me what you think!
I drink black coffee all day during my IF"s.
Just have to be careful: Caffeine can simulate low blood sugar conditions... Especially on an empty stomach.
For many people, especially when they don't understand it, it can be a somewhat disturbing feeling.
You feel like your brain is signalling a hypoglycemic state, and the natural response is to break the fast. Reality is that you are just wired out of your skull from drinking too much coffee in a fasted state.
If you are going to drink coffee while fasting, I would add it in slowley to see how you tolerate it.
I wouldn't sweat having plain coffee or tea at all. What I don't like about coffee is the amount of caffeine in it. Caffeine also is a stimulant but it also constricts the blood vessels causing less blood to get to one's muscles. These days I drink green tea during the mornings when I'm at work and I have some yerba mate during the afternoon. (I've become a fan of mate)
I've always drank coffee while fasting. It's never really given me hypoglycemia. It *has* made me too wired, at times. But that's just too much coffee on an empty stomach, as the other poster mentioned upthread.
I also waive the calories for coffee, and I'm big on calorie-counting.
I think black coffee, tea, stevia etc are all fine while IFing.
Getting my Grok on in the Pacific Northwest.
"C is for cookie, that's good enough for me."
"Cookie is a sometimes food."
"Sometimes cookie monster eat APPLE instead of COOKIE. Sometimes eat CARROT."
-Cookie Monster, partially reformed sugarholic
Are you doing it to lose weight or get your BF % refined to the decimal point?
I think Paleo's "IF" policy should be do it if your system is working fine, and you feel like skipping meals once in a while. Planning out 24 hrs or more is just another form of eating disorder.
I drink 8 oz every morning with stevia and cream and it doesn't hinder a thing.