The natural cure is to totally alter the diet consuming mostly vegetable, preferably much raw vegetables. Avoid all processed sugars and consume only occasional natural sugar foods such as fruit. Avoid fats and not too much bread, preferably whole and unrefined. No sugar drinks, water is best.
It can take a while but perseverance is the way, it can be done.
It does depend on the severity, maybe there is no alternative to medication and a proper diet.