Hi Everyone, I am Ro from the USA! I have hypothyroid Take spirulina I take 6 500mg tabs. It is a superfood containing iron, magnesium, b12, Spirulina is the richest beta carotene food, with a full spectrum of ten mixed carotenoids. It contains vitamins k, D, protien, good for everything truly amazing stuff. Look it up and read about it you will be amazed. I have gotten off several medicines with it!