Metformin is a primary choice of drug to treat hyperglycemia in type 2 diabetes because it

Metformin is an oral diabetes medicine that helps in controlling sugar levels. Therefore is a primary choice of drug to treat hyperglycemia in type 2 diabetes because it decreases glycogenolysis in the  liver. This is normally prescribed to the patients of diabetes during the early stages as opposed to injections which are later on advised when the sickness advances. 

Cis the most source of vitamins