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.
If the principal offense is a Class A, Class B, or Class C felony or murder, the penalty must be as prescribed for a Class D felony. SECTION 16-1-57. Classification of third or subsequent conviction of certain property crimes. A person convicted of an offense for which the term of imprisonment is contingent upon the value of the property involved must, upon conviction for a third or subsequent offense, be punished as prescribed for a Class E felony. SECTION 16-1-60. Violent crimes defined.