I do 20:4 5 days a week on a vegan plant-based, complex carb diet where the average carbs is around 240 grams and the average calories is 2100. But on 2 days a week, I do a vegan Keto diet (just 800 calories) where the net carbs is only 10 grams, so that the subsequent fasting periods for those two days kicks in the ketosis much sooner because of the low carbs digested. I also do one 48 hour fast every month. That 48 hour fast has the 2 Keto days on each side of it. I put all my meals into cronometer.com. It is clear to me from cronometer, comparing the high complex carb diet to the Keto diet that the former has much more nutrition. But I do use Keto on those 2 days to boost ketosis. People who do Keto 7 days a week get their ketosis from Keto, but I get mine from intermittent fasting boosted by Keto — there’s a significant difference there. Personally, I don’t think the Keto diet is a very healthy one.