Hypos tend to have problems converting vit A, some start to look a little yellowy or orangy (not quite you been Tangoed lol) Apart from possible liver problems which you should always look at, you may be having a problem in your gut, especially if you have unfriendly bacterial infections, parasitic infections or candida albicans (yeast). This fella seems to be trying to drum up business but his facts seem straight enough, just trying to show how hypothyroidism isn't as simple as the medical establishment would have you think.