Most food reactions will occur within a few hours of eating what you add back, although it can occasionally take up to two to three days for reactive symptoms to appear. (bewell.com)
That means that we have balanced 12 hours of eating with 12 hours of fasting. (idmprogram.com)
Plus, we now know that the foods we eat are so important that they can alter your gut bacteria within just hours of eating. (mindbodygreen.com)