Can eating loads of wholemeal carbs cause type 2 diabetes if slim? I don't eat white carbs on a regular basis.

CARBS,... Eating carbs is not the cause for developing Type 2 diabetes unless you also are out of shape, do not exercise, have a family history of Diabetes, and do not take care of your overall health. For example Michael Phelps the Olympic swimmer will consume 12,000 calories a day when exercising but does not get Diabetes, because he stays fit and burns them off. Even so, use portion control. Stay well!