To some degree, they can be. Not all the time these hereditary disease pop up during an individuals lifetime. Sometimes the illness manifests on the next generation. You can live with the generic healthy lifestyle advice circulating around and that's pretty much most of what you need to know. Hereditary diseases can have specific environmental factors that could trigger them. For example, if your family has a long history of diabetes, it doesn't follow that you would end up with one. But if you do the stuff that could get your blood sugar high up, then it's most likely your contribution to the disease that made it happen.
Even living healthy may also not be a guarantee that you wouldn't get those diseases. But it's your best chance at lowering your risk of getting the disease.
Diabetes is a health condition in which the blood glucose level rises above normal (6.1-7.0mmol/L).
Diabetes can be inherited which is usually referred yo as gestational diabetes (i.e from mother to her foetus).
Diabetes can also be incurred through lifestyle. Which happens when there's an impairment in the secretion of insulin and also inability of the insulin to function effectively when it has been secreted.
Inherited diabetes could be gestational (mother to child) or diabetes in family history.
Whichever way, it can be prevented when adequate and proper measures are taken.
The following measures can help prevent hereditary diabetes:
1. Check your risk of diabetes
Carry out a risk assessment test to confirm the possibility of being diabetic. It is the first thing to do, so as to ascertain how to go about with your lifestyle.
2. Manage your weight
Excessive body weigth, more especially fats stored around the abdomen can increase the body's resistance to insulin when secreted.
3. Quit smoking
Smokers are at a greater risk of getting diabetes than non smokers. The risk to benefit ratio of smoking is 5:1. That's if at all there's any health benefit in smoking.
4. Limit Alcohol intake
Excessive alcohol leads to weight gain, which in turn raises the triglyceride level.
5. Maintain a healthy balanced diet
Reduce your fat intake in your diet more especially saturated and trans fat. Go back a little on salt. Eat more fruits.
6. Exercise regularly
Go moderately on physical activities most of the week days. It helps in reducing blood glucose and also maintain blood pressure.
7. See your doctor for regular check-ups
Always try your best to carry out some medical test such as blood glucose level, blood pressure and cholesterol level. This will help you to know your body chemistry. As we grow old our body depreciate in function.
I hope this answer helps in regards to preventing hereditary diabetes.