I actually saw Dr. St Amand as he's an endo....in his office, he touched around my neck and said your thyroid is fine, but you have FM! He tried to push the guai on me, it's very very restrictive but I resisted. A friend on another FM group used it and said it helped her.
To this day, I'm not sure abut the FM diagnosed he gave me, on that day in July 1999, I had never heard of Fibro. I was 61 and was trying for 10 yrs to get my thyroid supported....I believed it was sluggish all those years...and the lab numbers told the docs, I was fine.
We are NOT numbers .. we are symptoms and thyroid dsyfunction is linked to 69 some health issues.
Guai is in mucinex. And it's otc supplement and docs also write scripts for guai. I don't KNOW. But not for me.