Personally, I find it’s easier to fast if I do low carb as well during my eating periods. Low carb is good because it minimizes your insulin response and so it makes transitioning into and out of fasting easier on your body.
My favorite is carb cycling. I paired it with weight training.
On my training days, I would eat a substantial amount of carbs after lifting. On my off days, 30-50g of carbs, max, and all of those were from fibrous vegetables and no starches.
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If you’re not going to do any weight training, then disregard.