Storage form
Selenomethionine
Builds up your body's selenium reserves, so your cells have a steady supply to draw from whenever they need it.
Thyroconvert
Restore your energy, focus, and metabolism.
When you have a Thyroid Deficit due to a lack of absorbable selenium, your cells can't convert T4 into active T3 thyroid hormone — which causes fatigue, brain fog, and slow metabolism. Thyroconvert delivers three bioavailable forms of selenium your cells need to convert thyroid hormone — which helps improve energy, focus, and metabolism.
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About this product
Many thyroid symptoms — including fatigue, brain fog, and slow metabolism — come from a Thyroid Deficit in your cells. Thyroid testing doesn't detect a Thyroid Deficit. Medication doesn't fix it. And doctors don't diagnose it. Your lab results may look "in range" even though your cells aren't effectively making and using thyroid hormone.
Thyroconvert is part of the HypoHero system because it plays a vital role in helping your cells convert T4 into active T3 — the usable form of thyroid hormone. But selenium alone isn't the whole story — it's not just about getting selenium, it's about getting it in forms your body can absorb and use. The selenium in food and most multivitamins often isn't bioavailable.
Without the right selenium in the right forms, that conversion process breaks down — and you may continue having symptoms even if your labs look normal or you take thyroid medication.
Here's a piece that rarely gets explained: making thyroid hormone is only half the job — your cells still have to convert it. T4 is the storage form; T3 is the active form your body actually uses for metabolism. That conversion from T4 to T3 happens at the cellular level, and it depends on selenium.
Thyroconvert delivers selenium in three forms, each with a different job: selenomethionine builds your reserves, selenocysteine builds the enzymes that drive T4-to-T3 conversion, and methyl-selenocysteine reaches tissues the others can't — including the thyroid itself.
Selenium also plays a role in how your body manages inflammation and oxidative stress — the same stress that can damage the thyroid and worsen conditions like Hashimoto's. The more inflammation in your body, the more selenium it uses up, which is part of why the right forms in the right dose matter.
Thyroconvert helps fix the Thyroid Deficit by giving your cells the absorbable selenium they need to convert thyroid hormone and support your energy, focus, and metabolism.
What's inside
Each form of selenium has a unique role. All three working together is what makes the full conversion system run.
Active form
Selenocysteine
Your cells put it straight to work, building the enzymes that do the T4-to-T3 conversion.
Targeted form
Methyl-Selenocysteine
Reaches tissues the other two don't saturate as well, including the thyroid gland itself, where it also supports a healthy inflammation response.
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FAQ
Common Questions
Yes — and it's especially important for Hashimoto's. With Hashimoto's, antibodies attack the thyroid and drive inflammation in the gland. Selenium is one of the minerals your body relies on to support a healthy inflammation response at the cellular level, and the methyl-selenocysteine in Thyroconvert specifically reaches thyroid tissue. People with Hashimoto's also tend to struggle with T4-to-T3 conversion, which selenium directly supports. Thyroconvert was designed with Hashimoto's in mind.
Yes. The older concern around MTHFR and certain supplements was mostly centered on folic acid metabolism, not selenium. The three forms of selenium in Thyroconvert — selenomethionine, selenocysteine, and methyl-selenocysteine — are well-tolerated across the population, including people with MTHFR variants. If you have specific concerns about your own health history, talk to your doctor.
Not reliably. Brazil nuts are often recommended as a selenium source, and they can be high in it — but the amount varies dramatically from nut to nut based on where the tree grew and the soil content. A single Brazil nut can contain anywhere from under 70 mcg to over 500 mcg of selenium, and you have no way to know what's in any given nut or bag. That makes Brazil nuts an unreliable daily source when you're trying to fix a Thyroid Deficit, where consistent intake matters. Thyroconvert delivers three forms of bioavailable selenium in the same dose every day, so your cells get what they need without the guesswork.
Yes — selenium is a mineral, and like all minerals there's a threshold above which too much can cause problems (a condition called selenosis). The upper tolerable limit for adults is 400 mcg per day from all sources combined. Thyroconvert is dosed at 200 mcg per day, so even doubling up to two capsules stays within that upper limit.
Most of the public fear around selenium toxicity traces back to a 2008 case where a liquid supplement was mislabeled and actually contained nearly 200 times the selenium stated on the label — roughly 40,000 mcg per daily dose. That outbreak affected 201 people and is still the largest selenosis case in U.S. history. At Thyroconvert's actual dose of 200 mcg, that scenario simply isn't in the same category.
One more thing worth knowing: the more inflammation and oxidative stress your body is managing, the more selenium it will use up, because selenium is part of how your cells handle that stress. For people with a Thyroid Deficit, the real risk is usually not having enough of the right forms — not having too much.
Yes, but with a caveat worth understanding. The most commonly ordered test is RBC (red blood cell) selenium. The issue is that selenium in red blood cells gets saturated quickly — specifically because RBC selenium mostly reflects one selenoprotein (glutathione peroxidase), which fills up first. So someone can show "normal" or "high" RBC selenium while other tissues are still short on what they need for thyroid hormone conversion. This is a known limitation of RBC testing.
In our experience, RBC selenium is useful when it shows you as low — it confirms you're not getting enough. But a result in the upper part of the range doesn't necessarily mean your cells have enough for all their needs. That's part of why we focus less on lab numbers and more on whether your symptoms, temperature, and energy actually improve — which the HypoHero app helps you track.
Thyroconvert is designed to work alongside thyroid medication — Levothyroxine, Synthroid, Armour, NP Thyroid, and others. Many of our members come to us already on medication but still feeling symptomatic, and Thyroconvert supports the cellular conversion of T4 into T3 that medication alone can't provide. Thyroconvert also works well with most other supplements, though if you're taking high-dose selenium from another source (for example, a multivitamin with over 100 mcg), you'll want to account for your total daily intake. If you have questions about your specific combination of medications or supplements, talk to your doctor.
Yes. Thyroconvert is manufactured in a cGMP-certified facility and third-party tested for purity and potency. You can view the current Certificate of Analysis on our website.