How does a doctor differentiate between type 1 diabetes and type 2…?
Also, are fasting blood sugar levels an accurate diagnostic test because i heard people with diabetes type 1 can have normal blood sugar levels from fasting but not after eating… is that true?
I know type 1 makes no insulin and type 2 makes little insulin but how does a doctor know? Are blood sugar levels higher in type 1 then in type 2? Is there a blood test to determine it?

Normal blood sugar levels shouldn’t be true
Below is a link that should answer your question
http://diabetes.niddk.nih.gov/DM/pubs/type1and2/
The link below discribes the what type 1 and 2 are
http://diabetes.niddk.nih.gov/DM/pubs/type1and2/what.htm
the only real way a doctor can tell the difference, is if he runs a blood test to see if there are any ANTIBODIES present. If there are antibodies then you are type 1 diabetic because that means your immune system is killing your insulin producing cells with the antibodies. Type 2 diabetics do not have any anti-bodies which means they still produce insulin. OH and a person can have normal fasting blood sugars if that person already had insulin in him (like if he is a type 1 diabetic and still has long-acting insulin in him from the night before).