Start the (optional) bone broth fast at some point during your 21-day pathogen purge. Ideal would be to do it the first week of the pathogen purge, but it will be effective at any point within the 3 weeks (or even during transition week before reseeding). The intention of the broth fast is to starve the bacteria and other pathogens in your system without “taking you down”, so choose a time you feel ready to fast. Starting on a day off or over the weekend is very helpful as you want to build in time to rest and relax without pressure.