Ive done a 2 day fast, 5 day fast, a 7 day fast and an 8 day fast. I’m currently doing a 40 day fast just because I really feel in my faith that I have to. Which is seriously the only thing thats keeping me going.
For me with my 7 and 8 day fasts. I stop eating alot of food like a week prior to the actual fast. So I go from eating 3 times a day with snacks at night, to eating once a day, and I would eat only at night. I did that for a week and then would take the dive to do a along fast. I feel by doing that you adjust your body to get used to not eating, and the hunger pains aren’t as intense because you gave yourself time to pretty much like shrink your stomach and get used to not eating. That’s what helped me get to a week of fasting.
I did that for this forty, I’m on day 7 right now, and experiencing some hunger pains. I didnt get hunger pains till about day 5.
I will say the more fasts you do the easier they get in my experience, and by easy I mean you don’t obsess over it that much, hunger isnt that bad, like the first time hunger and temptations were so bad i just gave in. Also time seems to pass by too. As for vitamins, I never take vitamins. Some people do though.