the most popular one is the 16 & 8 methods where you fast for 16 hours and eat within 8 hours and as I said there's no real difference between doing this sort of 16 and 8 type of fasting versus one meal a day and the only difference is probably that you might experience let's say slightly more otology if you eat only once a day but I think the difference is quite small and it's not like not like that important either