We know that 'lack of Synthroid' is NOT the cause of any thyroid problem. Exposure to chemicals, e.g. perchlorate, common food intolerances (e.g. wheat/dairy), adrenal fatigue and nutrient deficiencies are the cause of 'hypothyroidism' in the vast majority of cases.
An F3 felony is a shorthand expression for a class or category 3 (or III) felony in jurisdictions that use numbered offense categories. What such an offense is punishable by and whether it is punishable by more or less than an F2 felony depends completely on the laws of the jurisdiction in question.
Pimping is an example of a Class F felony. For more information, see Prostitution, Pimping, and Pandering Laws in Wisconsin. Class H and I felonies are punishable by fines of up to $10,000, prison terms of up to six years (for class H) or three years and six months (for Class I); or both imprisonment and a fine. These are the least serious felony crimes in Wisconsin.