Re: Cheated on a water fast how long to get back into ketosis?

I can also attest to this effect because often I can go most of the year without catching a cold, but when I do, 9 times out of 10 it happens on exactly the morning of day 3 entering ketosis. I consider it a trade-off, because once you are into ketosis your immune system is about 50% more functional than before. Probably more-so if you are fasting.