Extra Burn Keto – Foods containing carbohydrates are often also high in fibre, which is important for a healthy gut microbiome and keeping you fuller for longer. Medlin advises anyone on a low-carb diet to ensure they eat enough fibre-rich foods from leafy greens, broccoli, cauliflower, flax seeds, nuts, coconut and avocado. Some experts believe that the best way to retain cognitive capacity into old age is through periodic ketogenesis—but not necessarily triggered by the keto diet. Instead, evidence supports intermittent fasting, especially that which confines food consumption to an 8- to 12-hour window during the day and restricts intake, especially of carbohydrates, for 12+ hours overnight. The keto diet generally consists of low-carb vegetables, meat and seafood, dairy, eggs, oils, nuts and seeds, and certain high-fat, low-carb fruits such as avocados or berries.