Melatonin up-regulates insulin receptors. Get a lozenge or sublingual form. It can push T2 back to prediabetes, and it can reduce insulin requirements in T1. I'm T1, been taking melatonin 25 years now, my requirements stabilized at 40% less and that's continued until now. I have to use a 30 unit syringe w half unit markings to take my long acting insulin. I weigh 180 pounds and take 11.5 units of Novalog. My A1C has stayed below 7 for 15 years. And w these in arm sensors I'm down below 6.5. The doctor doesn't want me going lower and focus more on less highs & less lows.