Regarding the sodium intake issue, I wanted to share this email that I sent to Joel and Steve Coppola (my fellow guinea pig) a few weeks ago:
I had a little brainstorming session this morning as thyroid function was discussed by one of my profs in class; I figured that you two would be interested. Thinking back to Joel’s nutrition myths article, I think that there is a distinct possibility that increasing sodium intake would also help out during the updated cheater’s diet. Here are my thoughts; let me know if you think I’m a goddamned lunatic:
Adequate blood iodide concentrations are a must for sufficient release of thyroid hormone. Myxedema (hypothyroid syndrome/hyperthyroidism) results when iodine is chronically deficient (eventually leading to endemic goiters). Although the follicle cells of the anterior pituitary gland continue to churn out loads of colloid to attempt to increase TH (which, naturally, results from plentiful and effective TSH), this colloid is useless because the follicle cells don’t have the raw materials needed to iodinate it (necessary to make TSH functional). As such, T4 and, in turn, T4 output decrease appreciably.
Okay, back to the cheater’s diet. We all know that the best source of iodine is table salt. Most people don’t need to worry about adding salt to their diets simply because it’s in all the grains and processed foods that they eat each day. However, let’s consider the bodybuilder on the cheater’s diet. With the exception of my refeeds, I am living solely on meat, protein powder, fish oil softgels, and ground psyllium husk. In short, I ain’t getting shit for sodium (and thus, iodine) in me. I honestly don’t even think that my multi contains it. On my low calorie days, the signs of thyroid suppression are readily apparent: decreased body temperature, decrease blood pressure (it was 88/60 the other day), decreased RHR (48 in the middle of the day after walking around a bit), and decreased appetite.
All that being said, do you think that severe dieting is one more instance to really push the “supplemental” salt intake in one’s diet. All signs point to yes on my end, but I wanted to see if you agreed. Basically, I think that it’s a way to a) increase thyroid output on low-calorie days and b) magnify the effect of the refeeds (partially through the importance of sodium in glycogen synthesis). I think that the primary issue to consider in opposition to this notion is that the iodine deficit may not of sufficient duration to impact T4 and T3 to such a dramatic extent. Then again, in consideration of the aforementioned stats, I think that this argument ought to be dropped like a prom dress.
I’m thinking that this might be another one of the little things that could potentially make a serious difference. Your thoughts; Should I make my egg whites a little more tasty with a bit of table salt? God knows that I’m nowhere near the 2400mg RDA, which is unavoidable with a normal bodybuilding diet.