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Protein, Sugar, and the Fasting-Mimicking Diet

Daniel Chille
Renee Fitton
Renee Fitton, MS, RD

Director of Education & Healthcare Sales at Prolon

1 day ago
  • Renee draws the line between intermittent and prolonged fasting at about 48 hours. Shorter fasts mostly help metabolism by shifting the body toward burning fat, while longer fasts trigger deep cellular cleanup, called autophagy, usually around day three.
  • In Renee’s framing, sugar and protein are the two nutrients that pull you out of a fast, because they signal growth pathways like mTOR. That is why the fasting-mimicking diet she works with is plant-based, low in protein, and about 45% fat.
  • Renee generally keeps prolonged fasts to five days and sees no reason to go past ten, since fasting is still a stress on the body. If you carry a heavy toxic load, have active gut issues like SIBO or IBS, or are already depleted, she recommends working with a practitioner and building up to it instead of starting with five days.

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