Because simple carbs are things with lots of fats such as your fried foods, your gressy foods, and junk foods. But complex carbs are your veggies and fruits and lean protiens like fish or chicken so its not as bad for you.
There are three different types that can cause it Type A B and D
Depends on where you live. generally doctors have a legal requirement to respect your privacy if you’re over a certain age, in Ireland that’s 16
