In my experience, it's the residual sugar (in everything that comes in a box/wrapper/bag) that keeps this "sweetness sensitivity" high.
I've done strict keto off and on for 10+ years and drank Diet Coke like it was going off the market. When I cut out carbs (we're talking < 30g per day), it becomes obvious that it's real sugar that triggers the cravings for me. Never did a diet soda make me crave a candy bar. Instead, it was generally something like a bite of a real hamburger bun, or a couple french fries.
It's really hard to isolate the effects of things like artificial sweeteners when "real" sugar is absolutely everywhere.
I've done strict keto off and on for 10+ years and drank Diet Coke like it was going off the market. When I cut out carbs (we're talking < 30g per day), it becomes obvious that it's real sugar that triggers the cravings for me. Never did a diet soda make me crave a candy bar. Instead, it was generally something like a bite of a real hamburger bun, or a couple french fries.
It's really hard to isolate the effects of things like artificial sweeteners when "real" sugar is absolutely everywhere.