How would you know if your beta cells need restoring? I suppose you could ask your Dr to test your insulin production, (good luck with that)
Usually in type 2's our beta cells work very well, we produce lots of insulin tha8t our bodies have trouble using.
Our problem is not lack of insulin, it is not being able to effectively use the insulin we do produce (insulin resistance)
For some T2's who's pancreas is starting to struggle after years of hard work battling carbs in their diet, Insulin therapy is necessary. Maybe their beta cells will recover a little when their overworked pancreas gets a rest. The extra insulin will treat the symptoms of T2, high blood sugar, but not the cause, insulin resistance.
For the majority of T2's who still have healthy pancreas producing lots of insulin their bodies have trouble using. Adding more insulin would be like trying to put out a fire with a bucket of petrol and just make matters worse
We all had
Hyperinsulinemia long before our blood sugar levels got high enough to be diagnosed with T2