The manufacturer is on my prescription bottle, in my case it is Lannett. While absorption may vary between manufacturers, including Name brands, within the manufacturer, it remains stable. In fact, Lannett levothyroxine has a better absorption rate than Synthroid. One brand comes in a gelatin capsule which makes it less affected by things in your stomach, I think Tirosint. Anyway, things like proton pump inhibitors, like Prilosec, can interfere with absorption. Coffee can cut absorption by 25%, which is okay as long as you either drink coffee regularly and a slightly higher dose takes care of that, or you don’t drink coffee and you need lower dose. Steroids affect absorption definitely. Weight changes, if significant, change things too. That being said, people with normal thyroids have periods when they feel “off”. I tended to forget that because you don’t pay attention when you don’t have a health issue or aren’t on meds of any kind. Now I just ignore the stuff I would have ignored before Graves! Like you, having the thyroid gone was a relief and I am happy to feel normal. Glad you are doing well too.
