A Trip Back in Time: How People Talked About keto net carb 20 Years Ago

https://www.bariatricstation.com/keto-diet/keto-net-carbs-or-total-carbs/

One thing to worry about when going on the ketogenic diet is something called "keto flu." Not everyone experiences this, but for this that do it can be tough. You will feel lethargic and you may have a headache.