Keto then puts more restrictions in place, further increasing the likelihood of being deficient in some of these. "That's because you need to make sure your body is fat adapted so that it can get back into ketosis easily." In her practice, Devine has noticed that if the body is used to being in ketosis, it’ll snap back more quickly after eating a carb-heavy meal than if a person is new to keto, though there’s not enough research to confirm that this is always the case. Devine says not to jump right into keto cycling. She doesn’t encourage keto cycling unless the individual has been following a clean keto diet, which calls for sourcing the healthiest version of keto-approved foods, such as grass-fed meat and whole foods, for at least three months and has a regular and rigorous exercise plan. "I would definitely not try keto cycling until you’re about two to three months into your keto diet," she says. Others will do keto for 10 to 12 days followed by three to four days off.