I'd love to have one, and looked into it the Freestyle Libre a bit last year.
I've been low carb to keto to carnivore to ketovore/animal based for years. What I've noticed is just how much more stable my energy level is...especially as I got more an more animal based and zero carb. So really curious what that looks like with a CGM.
There's been some really interesting results among people like me that have used CGMs (non diabetics, very low carb).
1. Blood glucose levels can be really, really stable. Like basically a flat line outside of exercise, almost no rise after (non carb) meals, tiny bump when waking up.
2. Long term zero carb types still tend to have really stable blood glucose levels, but it can be a little higher (like maybe 90?).
3. Even among really fat adapted/non-diabetics, blood glucose level changes can be really different with the same foods in different people.
I'm not terribly concerned about blood glucose level changes, if for instance I take a big dollop of honey and fruit in my greek yogurt...what I really want to know is the area under the curve...how fast does my blood glucose level come down.
Anyway, I find all that stuff fascinating, and would love to experiment for a couple months. Or even just a few weeks. But I'm too cheap to spend $300 or whatever it is. Yet.