Being plaqued with tyroid issues I was looking for a supplement that offered good thyroid help. I am not hypo thyroid enough to need synthrol but I am on the slow end. I tried Bladderwrack which is a good herbal with great results the problem was I could only find in raw and had to either make a tea orplace it in capsules which I had no way of regulating the potency. I had a friend that suggested Sea Kelp instead it basically does the same thing yet upon reading up I found that the sea kelp is sometimes very poor depending on where it was produced.It appears that some coral calciums or sea kelps harvested in certain areas are irradiated. Now I am not sure if this is a great choice for me or not. Any thoughts on a good alternative, I purchase the Sea Kelp from The Vitamin Shoppe.