hi Tony,
Indeed, a chronically lowered body temp. is one of a number of symptoms of low thyroid, including generalized fatigue. If you've truly been low thyroid for decades, since that's how long you've been symptomatic, then other symptoms would've manifested by now ... review this
checklist for hypothyroid symptoms to see if it applies to you.
My first reaction to your post was NOT low thyroid, but reactive or functional Hypoglycemia. In fact, I suggested this to you in a
previous post a couple of weeks ago
. Drowsiness after eating or after prolonged period without food, even to the point of passing out and/or nausea; feeling cold and clammy, especially the extremities; difficulty losing weight; anxiety ... etc, etc, etc. The problem isn't about low blood sugar, the problem is that there's too much insulin. In fact the disorder would be more correctly called Reactive Hyperinsulism. The high insulin will of course make the blood sugar drop too low .. resulting in drowsiness, weakness, chills. As well, high insulin levels will make losing fat weight extremely difficult. Thirty years ago, Hypoglycemia was believed to be more common than it is, and was a "popular" diagnosis. Since then, doctors have swung the other way, and a few even deny that it exists as a bona fide diagnosis.
It might be worth buying a small blood glucose meter. They're relatively inexpensive, and can be found wherever diabetic supplies are sold, including WalMart - you don't need a prescription. Monitor and record your sugars several times through the day ... first thing in the morning (ie, after fasting all night), before all meals and at 30 min, 1 hr, 2 hr and 3 hr after meals. Do this for several days ... Keep a careful record of your results, including how you're feeling at the time. It would also be helpful to record exactly what you ate and how much.
If you are seeing a pattern of the blood sugar dropping quickly 2 hrs after a meal, to the pre-meal level or lower, then this indicates the pancreas are oversecreting insulin in response to the rise in blood sugar. Note that eating protein will cause a rise in blood sugar, while fat is neutral and has no effect on either blood sugar or insulin. What you're concerned about here isn't a high blood sugar reading, since you're eating low carb. The sign to look for is the too-rapid DROP in blood sugar after eating.
You might want to check out this article on
Reactive Hypoglycemia and this one
Hypoglycemia.
In general, following a low-carbohydrate program should bring relief to the symptoms. However, it's important that you spread your carbs and protein intake evenly through the day. Avoid saving up the day's carb allotment for one meal, even if it's within Atkins-permitted limits. Make sure you have some fat at every meal, to slow the absorption of glucose and protein. Don't go hungry ... you should be eating frequently, every 2 hrs, and having protein snacks between meals.
If you choose to monitor your blood sugars, and the results are abnormal, a consultation with an endocrinologist is in order. Untreated hyperinsulinism can lead to insulin resistance, elevated cholesterol and liver problems.
Hope you get to the bottom of this.
Doreen