Hi MsMelanie,
I am sorry that no one with practical experience relevant to your question has replied. – A lot of people focus on one of the 2 regular challenges, either the weekly or 4 weekly challenge, there is so much chatter on those threads a lot of people don’t have the time to look for one off questions. Perhaps it would be worth repeating your question on one of those threads? If you search on the list of recent topics you will see the weekly one has the current date in the title, while the current 4 week one has a title about vrooming into June. –
I struggled for years with all of the common signs of an underactive thyroid. – My body temp was very low and I relied on external heat sources to keep warm, struggled with energy levels and keeping weight off, but each time the blood tests were performed I was apparently just over the cut off limit of what is considered by the NHS to be a normal range of the hormone. – For a while I went private with a doctor who had a policy of treating the symptoms rather than the blood tests. – Who had a thriving practice prescribing Amour to those who were displaying signs of underactive thyroid and monitoring the results. It was great, but then I dropped out of the rat race so had a loss of income, and moved to a different country within the UK were there wasn’t an equivalent private practice at the same time as that doctor retired.
Since finding out about the science behind Insulin and fat storage, I have been reading about different research or articles published by experts on the topic. One of whom is a Dr Bikman. I saw this article by him that I thought you might find helpful. – I have been on the BSD since mid October, and am close to a 6 stone weight loss. I have noticed that I am a lot warmer than I was. – My low body temp was so bad that the first time I spent the night with one boyfriend he woke up screaming in the night. He had rolled over, put his arm over me and I was so cold to the touch that he thought I had died and he was in bed with a corpse. – Managing body temp in office spaces, or in cars or any space shared with others used to be such a problem.
” Here’s a small piece I wrote some time ago about insulin and thyroid that may be insightful: Insulin affects thyroid hormone production and action. This isnāt very surprising, as both hormones have a powerful metabolic role; while insulin signals the body to depress processes that use energy in favor of storing, thyroidās role is to, at its simplest, regulate the āmetabolic choke valveāāincreasing or decreasing the rate at which the bodyās cells are working. The totality of studies exploring the relationship between insulin and thyroid hormone yield a few important observations.
People that are insulin resistant are usually thyroid resistant. Yes, itās possible to be resistant to the effects of thyroid hormone. Just like with insulin resistance, where the body is less responsive to insulin and, thus, the body must make more insulin to have an effect, with thyroid resistance, the body must make more thyroid hormone for it to have the desired effect. This is why most overweight/obese individuals usually higher-than-normal thyroid hormone levels, not lower [1,2]. One of the most interesting manifestations of this phenomenon can be found in one interesting disorder of insulin resistance. Polycystic ovarian syndrome (PCOS) is a female fertility disorder that arises from insulin resistanceāthe ovaries begin producing too many male hormones (i.e. androgens) and too few female hormones (i.e. estrogens), which is a result of too much insulin in the blood. These women with PCOS (remember, itās a disorder of insulin resistance) tend to have larger thyroid glands [3], and the higher the insulin, the larger the thyroid gland [4].
Multiple reports show that carbohydrate restriction lowers thyroid hormone levels in the body. In one study, subjects were placed on two low-calorie diets that differed in their carbohydrate content. While both lost weight and had reductions in metabolic rate (which always happens when you eat less), the low-carbohydrate group had the greater drop in thyroid levels [5]. Another study put subjects on two low-carbohydrate diets that replaced the carbohydrates with either protein or fat [6]. Interestingly, but not unexpected, the group that ate the high-fat, low-carbohydrate diet not only had the greater drop in insulin, but also a bigger reduction in thyroid hormone.
Why does thyroid hormone drop more with carbohydrate restriction? Because insulin directly affects the thyroid gland. In particular, the thyroid gland appears to have more insulin receptors in conditions of increased insulin (i.e. type 2 diabetes) [7]. Additionally, insulin drives the growth and proliferation of thyroid cells [8]. Another potentially important connection is that insulin appears to increase thyroid receptors in certain cells throughout the body [9] (though this likely only happens if the body is sensitive to insulin). This may be another explanation of how improving insulin sensitivity can improve thyroid sensitivityāthere are more receptors for thyroid hormone, allowing it to act better. And as thyroid hormone acts better, the body doesnāt need as much of it.
As a final note, Iāve often stated that Iām unaware of any condition of human obesity that isnāt in some way linked to insulināinsulin is the master regulator of body fat. This holds true with thyroid disorders. Thyroid hormone affects insulin receptor expression at fat tissue. The most commonly known effect of thyroid hormone is to influence body weight. However, most people that are overweight, as indicated above, have normal to elevated levels of thyroid hormone. However, in those people with genuine hypothyroidism, they will often experience fat gain. This phenomenon, as with all other instances of humans gaining fat, is coupled with insulin. When thyroid levels are low (i.e. hypothyroidism), the amount of insulin receptors on fat tissue goes up by almost double [10]! In contrast, when thyroid is high (i.e. hyperthyroidism), the amount of insulin receptors on fat tissue drops to less than half. As a reminder, insulin is the signal that tells fat cells to grow or shrinkāitās the key regulator. If there are more receptors, thereās more āgrowth signalā, whereas fewer insulin receptors would convey a āshrink signalā on the fat cells.
What this means for you: There are no reports, none at all, that a low-carbohydrate diet lowers thyroid hormone too much; in other words, reducing carbohydrates will not cause hypothyroidism. As carbohydrates are reduced, the lowered glucose in the blood will lead to lower insulin in the blood, not only causing improved insulin sensitivity, but also improved thyroid sensitivity. And if youāre more sensitive to thyroid hormone, you need less of it.”