Type 1 is when your immune system erroneously kills the cells producing insulin in your pancreas. Treatable by injecting insulin manually - but as any substitute, there are caveats, it's not perfect. Type 1 is pretty binary, you either have it or you don't, it appears rather rapidly, usually at young age, up to around 20. There's no way to avoid injections through diet.

Type 2 is when the cells that are _reacting_ to insulin are no longer doing so very well. Lots of reasons: genetics, body weight, physical activity. It's much less binary, with gradual onset over years. Can initially be managed by change of diet, activity, pills - later it also requires injections like type 1.

I use a drug called Metformin daily which slows down my digestive tract (you feel fuller after a meal longer like Ozempic), lowers the uptake of glucose in your gut and lowers glucose production in your liver.

That and a low carb diet is essential.