Hi my boyfriend has type 3 diabetes and we cant figure out why all of the things we have read so far talk about bad diet and unhealthy weight. He weighs only 10 stone and does not eat unhealthily and I want to know why he has it in the first place? And if there is anything he can do to stop symptoms occuring or even get rid of it completely? He was told it is anxiety related and then there are other websites saying it can be linked to Alzheimers disease (which my grandfather suffers with currently and is very scary to think that this could happen to him). May I add hes is only 22.