What does 3rd generation mean? My test came back as a 6.847. I was on levothyroxine 25 mcg for almost 9 years and was having side effects of weight gain, bloating, and most recently elevated Triglycerides.I went off meds for about four months and tested normal and felt much better. Now My test came back with the 6.847 and I asked to try brand Synthroid. I am starting to feel the same way I did on the levothyroxine, but also tired. My grandmother has taken Armour for years, but she said they discontinued it? Has anyone tried Biodenticles?