Teaser it's a little bit over my head. When they say excess fat, do they mean body fat or dietary fat?

People with hypothyroidism are more prone to dying of heart disease also. Would it be because we can't burn free fatty acids when the thyroid levels are low.

I've also read that once thyroid levels are restored there's a period of time before the mitochondria normalize. Is this article saying that can be facilitated by fasting?