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4.6 ★from 2,473 verified reviews 100,000+thyroid patients served 8 yearson the market 60 daysmoney back guarantee Why most thyroid patients stay tired Stop storing your thyroid hormone and start activating it Standard thyroid treatments (like levothyroxine) provide only the storage form of thyroid hormone, and most thyroid patients have no idea. And unless you activate that thyroid hormone into active T3, your stubborn low thyroid symptoms will stick around.
I created T3 Conversion Booster to break the cycle. It contains research-supported ingredients that naturally help your body activate that stored thyroid hormone to support your metabolism, energy, and cells.
Dr. Westin ChildsThyroid specialist and formulator 1 Your medication gives you T4 T4 is the storage form of thyroid hormone. On its own, it’s inactive. 2 Your body must convert it to T3 T3 is the active hormone your cells actually use. When conversion falters, symptoms stay even with “normal” labs.
3 This formula supports that step Zinc, selenium, guggul and six more ingredients support the conversion process itself.* What’s inside Eight ingredients, each at a dose that does something No proprietary blends hiding the amounts. Every ingredient is here because the research says it supports one of the steps your body needs to make and use T3. The actual label, straight off the bottle. Click to enlarge. Guggul extract 500 mg Sourced from the sap of trees native to India. Research shows it may help support thyroid conversion and immune health.
Ashwagandha 200 mg An adaptogenic compound shown to support thyroid and adrenal function, balanced TSH levels, muscle mass, and recovery.
Zinc zinc citrate An essential mineral that supports healthy thyroid and immune function as well as thyroid cellular sensitivity, which makes it ideal for T3 support.
Selenium l-selenomethionine Required by your body to use the enzymes known as selenoproteins. These proteins support thyroid conversion and glutathione.
Vitamin A retinyl palmitate A fat-soluble vitamin involved in regulating thyroid hormone at the cellular receptor. It supports T3 binding and activation.
Iodine Icelandic kelp, 75 mcg Used by the thyroid gland to create T4 and T3. Low iodine states may lead to reversible low thyroid function. Paired with selenium and kept well under the 300 mcg upper range.
Vitamin E d-alpha tocopheryl An antioxidant that may support a healthy immune system, which may translate to less thyroid gland damage in states of Hashimoto’s.
* Rosemary extract rosmarinic acid Flush with rosmarinic acid, carnosic acid, and carnosol, which have antioxidant and immune-modulating supporting effects.
Every dose on the label No proprietary blends. You can read the exact amount of all eight ingredients and check them against the research yourself. Third-party tested Every lot we produce is tested for heavy metals, pathogens, bacteria, mold, and yeast. See the results No common allergens No wheat, gluten, yeast, soy protein, dairy, fish, shellfish, peanuts, tree nuts, or eggs. Nothing artificial No artificial colors, no artificial sweeteners, and no artificial preservatives. Real-world patient outcomes What thyroid patients actually report Read the full Patient Outcomes Report for verbatim quotes, methodology, and limitations. 87.2%overall satisfaction 70.4%reported thyroid symptom relief 48.4%felt like themselves again 34.8%use it long-term “This product has been life changing. Most of all I notice help with brain fog and afternoon fatigue. I notice a MAJOR difference when I have forgotten to take it a couple days in a row.” ★★★★★Ryser J.✓ Verified buyerT3 Conversion Booster ★★★★★ Thank you! My experience has been fantastic. I have way more energy, no hair shedding and I overall feel 100% better. I just ordered three more months of the T3 Booster. Jamie F. ✓ Verified buyer ★★★★★ Bloodwork improved After 3 months of using, my thyroid bloodwork came back improved, my T3 was higher. I have more energy and the afternoon slump has decreased. My doctor said keep taking it. Verified customer ✓ Verified buyer ★★★★★ Great stuff I ditched Synthroid last year and went with Dr. Childs’ Thyroid Glandular, but when I added T3 Conversion Booster I could really feel more energy and more stability. Lynae W. ✓ Verified buyer ★★★★★ Best vitamin I have not had an elevated T3 in over two decades. I cannot take Cytomel. I have not had consistent energy on a daily basis in over two decades. I can never stop taking this. Jean D. ✓ Verified buyer ★★★★★ Feel ALIVE The biggest change is having the energy to do more than the absolute essential tasks. It is enjoyable to be with friends now rather than wanting to go home and take a nap. Susan G. ✓ Verified buyer ★★★★★ Free T3 back to normal This supplement definitely helped boost my T3 levels. Taken with prescribed liothyronine, my free T3 level is back to normal acceptable values, and proven with how good I feel. Verified customer ✓ Verified buyer Read all 2,473 reviews Add to cart · $43.99Or subscribe and pay $39.59. Free shipping either way. Frequently bought together Patients often pair it with these Thyro Mag+ The mineral layer. Three forms of magnesium for your gut, your thyroid, and your overnight recovery. $34.99 · View Essential T2 The T2 layer. A direct metabolic signal for patients who need more than T4 and T3 alone. $41.99 · View Your new schedule Two capsules, once a day, before noon 1 Take 2 capsules each morningWith or without food, any time before noon. 2 Space it from your thyroid medicationIf using with thyroid medication, take it 30-60 minutes before or after. 3 Stay consistentOne bottle is a full 60 days. The subscription exists so you never break the streak. What to expect with daily use Weeks 1 to 4 Subtle changes start You may notice initial improvements in early morning energy and well-being. Consistency is key during this phase. Weeks 5 to 8 Steady energy You may notice more consistent energy throughout the day without the typical 3 PM afternoon slump. Your hands and feet may start to feel noticeably warmer.
Weeks 12+ Metabolism and labs Your metabolism will feel stronger and more consistent, supported by steadier T3 levels. This is where you may start to see changes to your free T3 and reverse T3 levels.** How it compares See how T3 Conversion Booster compares T3 Conversion Booster Other thyroid supplements Thyroid medication (Rx) Regular supplements Made for thyroid patients ✓ ✓ ✓ ✕ Thyroid safe ✓ ? ✓ ✕ Created by a thyroid expert ✓ ? ✕ ✕ Supports T3 conversion ✓ ? ✕ ✕ Proven ingredients ✓ ? ✓ ? Therapeutic dosing ✓ ✕ ✓ ✕ Usable with thyroid meds ✓ ? ✓ ? Available without prescription ✓ ✓ ✕ ✓ 60 day money-back guarantee ✓ ✕ ✕ ✕ Common questions Frequently asked questions Can it be taken if I’m already taking thyroid medication? Yes! T3 Conversion Booster was designed to be used with all thyroid medications, including those that contain T3 like Cytomel and liothyronine, and formulations of NDT like Armour Thyroid, NP Thyroid, and Adthyza. For best results, take it 30-60 minutes away from your thyroid medication (either before or after). Will it increase my free T3 levels? In short, maybe, but not always. In general, thyroid support supplements typically do not have a big impact on thyroid lab tests, especially when compared to prescription thyroid medications. This is because they each contain different ingredients, and each has a different mechanism of action. Thyroid medications typically have a bigger impact on thyroid lab test levels like TSH, free T3, free T4, and reverse T3. Thyroid support supplements like T3 conversion boosters tend to work more at the cellular level, which impacts symptoms but doesn’t always impact thyroid lab test results. This isn’t always the case, though, as some people do see changes to their lab tests when using these types of supplements. But because of the reasons listed above, the best way to determine if it’s working for you is by evaluating how you are feeling, not your thyroid lab tests. Can I use it if I have hyperthyroidism? T3 Conversion Booster is considered a low thyroid support supplement, so you generally would not want to take it if you are in a state of thyroid overactivity or hyperthyroidism. Having said that, there are a few situations where it may make sense to use low thyroid support if you have been labeled with hyperthyroidism: #1. If your thyroid has been surgically removed. If your thyroid has been removed, then you are considered to be hypothyroid even if the reason for the removal was due to hyperthyroidism. #2. If your thyroid has been ablated with radioactive iodine. If your thyroid has been ablated, then you are considered to be hypothyroid even if the reason for the ablation was due to hyperthyroidism. #3. If you are undergoing block and replace therapy or add-back therapy for hyperthyroidism. Block and replace therapy is an uncommon treatment used in some situations where a patient with hyperthyroidism will take both thyroid medication like levothyroxine as well as thyroid blocking medication like methimazole. If you are undergoing this kind of treatment (which is uncommon), then you can consider thyroid support supplements as well. In general, if you are using thyroid-blocking thyroid medication like methimazole, then you probably shouldn’t use T3 Conversion Booster. On the other hand, if you are taking any sort of thyroid medication replacement like levothyroxine (or any others), then you can consider using T3 Conversion Booster. Can I take it if my reverse T3 levels are elevated? Absolutely! If you are trying to lower reverse T3 levels, then focusing on free T3 makes a lot of sense. Here’s why: Your body has the option to turn T4 into either T3 or reverse T3.
When you push the pathway down the T4 to the T3 route, you will necessarily reduce how much T4 is available for reverse T3 production. In other words, anything that decreases T4 to reverse T3 conversion will increase free T3, and anything that increases T4 to T3 conversion will decrease reverse T3. Is it still helpful if my thyroid has been removed or ablated? Yes! T3 Conversion booster is still beneficial to those without a thyroid and for those with a nonfunctioning thyroid gland (those who have undergone RAI). The reason is simple: Even if you don’t have a thyroid gland, you still need to produce T3, and because thyroid conversion occurs outside of the thyroid gland
, it doesn’t really matter if your thyroid is present or not. It can be argued that T3 Conversion Booster is even more important for those who no longer have a thyroid gland because they are all almost exclusively taking T4-only thyroid medications like levothyroxine, which require conversion to become active. Can I take it if I’m pregnant or breastfeeding? T3 Conversion Booster contains two ingredients that can sometimes be problematic for those who are pregnant: vitamin A and ashwagandha. These aren’t necessarily harmful, but you will get differing opinions on their use during pregnancy, depending on who you are talking to. For this reason, we always recommend that you get approval from your ob/gyn or midwife (or whoever is caring for you during pregnancy) prior to using any supplement, including this one. Will it still work if I’m not taking thyroid medication? Yep! You don’t need to be taking thyroid medication in order for T3 Conversion Booster to be beneficial. It just so happens that most people who take it are already taking thyroid medication as well, but there are plenty of people who aren’t, and they have had success using it. If this supplement is so great, then why doesn’t my doctor know about it? Great question! We’d all like to believe that our doctors are 100% up to date on the latest research as it pertains to all aspects of our health and thyroid, but that just isn’t the case. If they were, then we wouldn’t have an epidemic of unhappy thyroid patients who still struggle with low thyroid symptoms despite taking their thyroid medication and doing everything else correctly. For now, the existing thyroid treatment paradigm leaves a lot to be desired, which means extra help outside of traditional medications and treatments is often needed. These treatments, in the form of supplements and lifestyle changes, are only necessary for those people who are not feeling 100% right now. If you are someone who is not experiencing symptoms like fatigue, weight gain, cold intolerance, pain, depression, and so on, then you’d have no need to use thyroid support supplements like T3 Conversion Booster. But if you are like many other thyroid patients out there who are still suffering, then it would be worth considering! Will using this supplement cause my T3 levels to be too high? Nope! Instead of containing T3 thyroid hormone, T3 Conversion Booster contains natural ingredients that help your body produce a healthy level of T3. This means that there is never a risk of overproducing T3 and that it can be added to medications that contain T3. How do you take it? The recommended dose is 2 capsules taken each day (with or without food) before noon and at least 30-60 minutes away from your thyroid medication (if you take any). At 2 capsules each day, this supplement will provide you with a 60-day supply. What’s the difference between T3 Conversion Booster and T3 thyroid medication? Unlike Cytomel and liothyronine, which contain T3 thyroid hormone, T3 Conversion Booster contains all-natural ingredients in the form of vitamins and botanical ingredients. How long should I take T3 Conversion booster? T3 Conversion Booster can be taken indefinitely, and I recommend using it for as long as it is helping you feel better. How long does it take to work?
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