The worst effects of excessive Insulin, non alcoholic fatty liver and insulin resistance (which becomes type 2 diabetes after some time) can be reversed pretty easily by cutting sugar, fasting or a diet with extremely low levels of carbohydrates (Ketogenic Diet). Check Dr. Jason Fung and Robert Lustig on youtube. They both have done a great deal of research about the topic and have published very interesting material. I have adopted a very high fat, low carb diet (LCHF) and avoid all sugar for a couple months now and it is absolutely incredible how it changes your body, makes you loose fat and increases overall energy. Gone are these cycles of high and crashing after meals etc. I am absolutely convinced, that we will have a wake up to the toxicity of sugar very similar to that of cigarettes. Especially cancer and sugar seem to have a very strong and under researched relationship.

Thank you for your reply, definitely interested in this. Going on further investigation!

++++Dr Jason Fung

There is be a cliff, over which the damage is permanent. If you change habits soon enough, then we know many avoid it the permanent damage altogether. This is due to the beta cells in the pancreas; destroy to many, and go below a critical threshhold, then they don't seem to be repaired/regenerated enough forever more.

Thanks for your reply, that gives me something to take action for as currently I consume a lot of sugar in my day to day live.

After I ran into Dr Lustig's stuff which I found was also backed up by other pediatric endocrinologist, I cut out as much sugar and processed carbs as possible. Not as hard for me as I'm a meat and vegi kinda guy anyways. My thought was worst case avoiding sugar, processed carbs, and beer isn't going to be bad for you. Best case, avoid Type II diabetes.

Also following Lustig's advice on sugar and alcohol, make it count.