Thyroid and Hashimoto's

Medication absorption, which matters more than any food

If you take levothyroxine, how you take it affects how much you actually absorb — and inconsistent absorption looks exactly like an inadequate dose. Before changing anything else, this is the thing to get right.

• Take it on an empty stomach, consistently, with the same gap before eating each day. Consistency matters as much as timing.
• Separate it from calcium and iron by about four hours — including supplements, fortified foods and antacids. These bind it and reduce absorption substantially.
• Coffee interferes with absorption. It does not have to go; it has to be spaced.
• Soy and high-fibre supplements also affect absorption, and again the answer is spacing rather than avoidance.

People are frequently adjusted upward in dose when the actual issue was a supplement taken at breakfast.

Iodine: where enthusiasm does harm

Iodine deficiency causes thyroid disease, which is why iodine supplements are widely sold to people with thyroid conditions. In countries where salt is iodised, deficiency is uncommon — and excess iodine can worsen autoimmune thyroid disease, including Hashimoto's.

So supplementing iodine without a demonstrated deficiency is not a neutral act with possible upside. It is one of the few nutrition interventions in this area that can actively make the condition worse, and kelp and seaweed supplements are the usual route.

Gluten, selenium, and being honest about the evidence

Gluten. There is no good evidence that removing gluten helps Hashimoto's in people who do not have coeliac disease. But coeliac disease is genuinely more common in people with autoimmune thyroid disease, which makes testing worthwhile — and the test only works while you are still eating gluten. Removing it first is the mistake that makes the question unanswerable.

Selenium. Modest evidence that it reduces thyroid antibodies, with less clear evidence that this changes how anyone feels or alters the course of the disease. Worth discussing, worth keeping in proportion, and worth knowing that selenium has a narrow safe range.

The rest. Most protocols sold for thyroid conditions are not supported. Saying so is more useful than adding another one.

Weight, realistically

Untreated hypothyroidism causes weight gain, but typically modest and substantially fluid rather than fat. Treating it does not usually produce dramatic loss, and being told that it will is a setup for disappointment and for blaming yourself when it does not happen.

What is true: adequate treatment removes a genuine obstacle, and weight then responds to the same things it responds to in anyone else. The thyroid is not the reason nothing works, but an under-treated thyroid does make everything harder — which is why the absorption section above comes first.

When to see a doctor

Dose adjustment, antibody testing and monitoring intervals belong with your physician or endocrinologist. Nutrition does not replace thyroid hormone replacement, and no diet does.

Rapid heart rate, significant unintentional weight loss, tremor, severe fatigue, a visibly enlarging thyroid or difficulty swallowing need medical assessment rather than dietary advice.

Booking, and what it costs

Two routes, and which one is cheaper depends entirely on your plan rather than on which sounds better.

Through insurance. Medical nutrition therapy is a covered benefit on many plans, sometimes with no copay at all. Booking runs through Fay Nutrition, which checks your benefits before the first appointment so you know the number in advance rather than six weeks later.

Self-pay. A flat $140 per session through CognitiveMind — no benefits check, no prior authorization, no denial arriving after the fact. If your coverage is thin, absent, or has a deductible you will not meet this year, this is often the more predictable of the two.

Telehealth, in any of the 18 states where the licence is active.

Common questions