is l-carnitine good for hyperthyroidism The effects of supplementation on lipid profiles in adults: A systematic review and dose-response meta-analysis Hyperthyroidism and Functional Medicine Guide
Description
The TMAO issue requires more long-term trial data to be definitive

Yes, taking up to 20 grams of BCAAs daily in divided doses (~5-10 g per dose) is considered safe

doi: 10.1016/0042-6822(74)90390-0

Cardiologist Stephen Sinatra, M.D., pioneered CoQ10 supplements for heart health Sinatraa legendary physician, educator and author who invented 'integrative cardiology' and blazed nutritional paths for four decadesdied in June
