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.
1st Degree Felony vs 3rd Degree Felony. The difference between first degree and third degree felonies is based on the gravity of the crime and the requisite penalties. There are six classes of felonies in state criminal codes. First degree felonies, the most serious felony charge, carry a possible life prison sentence without parole.