| 5 star (1) | 100% |
Bibi (Nashville, Tn) on 01/15/2010: 
As soon as I started taking 200mcg selenium and 50 mg zinc with a vitamin E source (usually sunflower seeds) and a stress B complex, I immediately stopped having this problem. I have read on various sites on the internet that Selenium and Zinc deficiencies cause problems with the conversion of T4 to T3. Good luck.
