Do you have any thoughts on whether long-term use of a traditional ultra-low-carb diet can interfere with thyroid function?
I would be strictly speculating here because I believe there is no direct clinical evidence. However, one of the major problems of the ultra-low-carb diets are that they yield a net metabolic acidosis because there is insufficient alkaline base (only derived from fruits & veggies) to neutralize the net renal acid load that the kidney must deal with from a high-meat diet. As I have pointed out in question 2, there is some evidence that a net metabolic acidosis may elicit a mild primary hypothyroidism and hyperglucocorticoidism.
