by Kelvin Labs · Boston, Massachusetts
Liver & thyroid support complex for treating a conversion disorder
For a short time at a launch discount, exclusively from Kelvin Labs
(in the 6-jar pack)
Order today, delivered in 3-5 business days (US)
2 capsules a day with a meal
Satisfied - or your money back, guaranteed!
We only recommend products we genuinely stand behind. Kelvin Labs gives a 90-day money-back guarantee. One email to support@getkelvinlabs.com is enough.
We gave The Converter to our independent product testers:
"More energy than I've had in 8 years!"
"I've been taking The Converter for almost 2 weeks now and notice more energy, better digestion and more inner calm. I've had Hashimoto's for 20 years and all that time the problem that my T3 stays low - and that the high dose of levothyroxine strains my heart: palpitations, high blood pressure."
"I'd started to think levothyroxine just didn't work for me."
"I've been on The Converter for a while now and this is what I notice: I'm no longer cold, my tiredness has gone, my weight is stable, my nails are strong, the hair loss is less and my digestion is back to normal. Only my short nights aren't fixed yet."
"Over 7 pounds off in one month, without a single binge."
"I had such severe palpitations that I often couldn't fall asleep at night or was woken by them. I was tired always and everywhere and kept gaining weight despite eating healthily. After 1 to 2 weeks of The Converter the palpitations were completely gone. Losing weight then happened by itself, without changing my habits. Oh - and that extreme sweating I used to get has disappeared entirely too. I've just ordered another 6 jars because it simply works very well and I feel noticeably better. Thank you!"
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Please note: The Converter has sold out several times before. Check right away whether it is still available.
The Converter helps your body convert thyroid hormones efficiently and finally put them to use. As the only liver & thyroid support complex in the US, The Converter contains both glutathione and selenium - two substances directly involved in the conversion of thyroid hormones.
Better use of T3 means every organ in your body gets its energy back. The result: more energy, less hair loss, better digestion and a faster metabolism.
The Converter carries 250 mg milk thistle, 100 mg artichoke and 100 mg dandelion: highly active plant compounds that lower cholesterol and are excellent even for a fatty liver. The premium formula adds 90 mg of choline, the nutrient your liver uses to move fat out.
With The Converter you tackle fatigue, cravings, hair loss, poor sleep and digestive problems - and win back your quality of life.
As the body's detox organ, the liver plays a key role in thyroid health. The inactive hormone T4 is converted into active T3 in the liver. When that conversion fails because the liver is overloaded, you have a conversion disorder. The T4 from your own thyroid or from your medication is then not converted. The result: active T3 never reaches your cells and you stay tired, listless and drained of energy.
The Converter uses natural ingredients to cleanse the liver and actively promote the conversion of T4 into T3. It is the first and only liver & thyroid support complex in the US that not only actively restores the liver but also supports the conversion of thyroid hormones. The lead roles go to glutathione and selenium, the two things the converting enzymes run on, backed by 90 mg of choline that helps the liver clear out fat.
All Kelvin Labs products are based on the latest scientific insights and are continuously and rigorously tested in the laboratory.
Once a day, 2 capsules with plenty of water at the second meal of the day, a few hours after your thyroid medication. One jar = 60 capsules = exactly 30 days.
If you recognize yourself in one or more of these points, there's a good chance The Converter will help you:
New premium formula
2 capsules a day. 6 active ingredients, each at the dose that does the work. A formulation made for Kelvin Labs, not bought off the shelf, with no proprietary blend hiding the numbers.
250 mg
Silybum marianum, seed
Shields liver cells and supports their repair, so the organ that converts your T4 can keep up.
100 mg
Cynara scolymus
Keeps bile flowing and protects the liver's own glutathione stores.
100 mg
Taraxacum officinale
Bitter compounds that get fat digestion and bile moving again.
90 mg Upgraded +80%
from choline bitartrate
Supports normal liver function and fat metabolism: it is how your liver moves fat out of its cells.
25 mg
L-glutathione
The antioxidant the T4-to-T3 enzymes depend on, delivered ready-made.
50 mcg 91% DV
as L-selenomethionine
Supports normal thyroid function. The enzymes that turn T4 into T3 are built around it.
| Nutrient | Amount | % DV |
|---|---|---|
| Selenium as L-selenomethionine | 50 mcg | 91% |
| Milk Thistle extract Silybum marianum, seed | 250 mg | † |
| Choline | 90 mg | † |
| Dandelion extract Taraxacum officinale | 100 mg | † |
| Artichoke extract Cynara scolymus | 100 mg | † |
| L-Glutathione | 25 mg | † |
% DV = Daily Value. † Daily Value not established.
Ingredients: maltodextrin, Milk Thistle extract (Silybum marianum, seed), choline bitartrate, dandelion extract (Taraxacum officinale), artichoke extract (Cynara scolymus), bulking agent: corn starch; capsule shell: gelatin; L-glutathione, anti-caking agents: magnesium salts of fatty acids, silicon dioxide; L-selenomethionine.
60 capsules per jar. Free from artificial colors, sweeteners and preservatives.
Not happy with the results? One email to support@getkelvinlabs.com is enough. Free shipping on 3+ jars.
Guaranteed by Kelvin Labs · Boston, Massachusetts
If you recognize yourself in one or more of these points, there's a good chance The Converter will help you: you already take thyroid medication but feel no improvement · your fT4 is fine but your fT3 is low · your rT3 is high · you have a fatty or weak liver (signs: pressure in the upper right of your abdomen, getting up to pee at night, bloating, little appetite) · you have high cholesterol and/or high triglycerides · you have little or no thyroid tissue left and depend on medication.
Three things. Choline went up from 50 mg to 90 mg a day, 80% more. Every other active stayed at full strength: 250 mg milk thistle, 100 mg artichoke, 100 mg dandelion, 25 mg glutathione and 50 mcg selenium. And the capsule moved up to size 00, the largest standard size, so nothing had to be cut to make room. Still 2 capsules a day, still 60 in a jar.
Yes, absolutely! Never just stop your medication. The Converter is not a medicine for an underactive thyroid. Take it alongside your medication. If you notice you feel better, you can have your dose adjusted step by step in consultation with your doctor - ideally while having your levels checked regularly.
Weight problems usually come from a slow metabolism. And that - like most other symptoms - is linked to too little active thyroid hormone in your cells. Improve the conversion of T4 into T3 and your metabolism improves too.
Hair loss often happens because too little active T3 reaches the hair roots. Without T3 your body lacks the energy to make keratin and keep your hair's growth cycle going. The Converter specifically supports the conversion of T4 into T3 - right where that process mainly takes place: the liver.
Normally your body converts T4 into active T3. T3 breaks down certain sugar molecules in your skin. Those molecules bind water under your skin and in your tissue. When a conversion disorder stops T4 being converted properly, those molecules pile up and hold more and more water - the familiar swelling in legs, ankles and face. Once the conversion gets going again, those molecules are broken down and the excess fluid can drain away. The swelling reduces and your skin returns to normal.
Every cell in your body needs energy - in your brain, your muscles, your heart. That energy comes from active T3. When too little T3 is made because the conversion stalls, your body runs in power-saving mode and you feel permanently tired, listless and flat - however much you sleep. The Converter helps get the conversion going again, so your cells get their energy back and you feel more awake, fitter and more alive.
Yes, especially then. The Converter contains only natural ingredients. Without your own thyroid tissue it is even more important that the T4 from your medication is converted properly.
Yes, it makes sense then too to support your body in converting thyroid hormones.
2 capsules after the second meal of the day, with a glass of water. Take it a few hours after your thyroid medication.
Amino acids matter for an underactive thyroid, but they fall short: they do nothing for the liver. The Converter gives your liver glutathione ready-made - plus 250 mg milk thistle, 100 mg artichoke, 100 mg dandelion and 90 mg choline.
Most customers report a first noticeable improvement after just 3 days. The full effect unfolds after about 2 months. That is time we should allow the body.
One jar contains 60 capsules and is exactly enough for 30 days.
Yes, a 90-day money-back guarantee. Test it risk-free - if you're not 100% convinced, email support@getkelvinlabs.com.
Kelvin Labs is a young American company based in Boston, Massachusetts, focused entirely on thyroid health. My delivery was quick and customer service was friendly. The product page also carries verified customer reviews. The company strikes me as very serious.
Order The Converter by Kelvin Labs now at the launch offer price. This offer is only valid for a short time - once the limited stock is gone, the deal ends. You can test the product at home risk-free for 90 days.
"Finally, energy again."
"Honestly, I was pretty skeptical. I'd never heard of the link between liver and thyroid. So I was all the more surprised that my sluggishness eased even without 5 cups of coffee a day. I've even got the urge to play tennis again. Amazing!"
"Genuinely surprised! I've been taking the capsules for 3 weeks now."
"My average body temperature has gone up from 95.9 to 97.0 degrees. The stubborn inflammation in my mouth has gone and my digestion is running beautifully!"
Studies and effect per ingredient. The original source references are listed 1:1.
Artichoke leaf extract has been known since antiquity for its health-promoting properties. It supports liver function by promoting the metabolism and blood flow of liver cells, stimulating cell growth and repair processes and protecting the cells against toxins. The extract also helps maintain redox balance by protecting glutathione stores, and acts as an antioxidant against free radicals.
A 2015 study shows that artichoke leaf extract (Cynara scolymus) offers considerable health benefits: antioxidant, liver-protective, bile-promoting and lipid-lowering effects. A 2019 study extends those insights and demonstrates the antioxidant properties of artichoke. Systematic reviews and meta-analyses clearly show the antioxidant effect, especially through raising glutathione in the liver.
Ben Salem, M., Affes, H., Ksouda, K., Dhouibi, R., Sahnoun, Z., Hammami, S., & Zeghal, K. M. (2015). Pharmacological Studies of Artichoke Leaf Extract and Their Health Benefits. Plant foods for human nutrition (Dordrecht, Netherlands), 70(4), 441-453. https://doi.org/10.1007/s11130-015-0503-8
Salekzamani, S., Ebrahimi-Mameghani, M., & Rezazadeh, K. (2019). The antioxidant activity of artichoke (Cynara scolymus): A systematic review and meta-analysis. Phytotherapy research : PTR, 33(1), 55-71. https://doi.org/10.1002/ptr.6213
Milk thistle extract is known for its liver-protective properties and belongs to the antioxidant medicinal plants that neutralize free radicals and reduce oxidative stress. The plant has proven itself in supporting liver health and is well researched in that respect.
An Italian research paper from 2010 in particular stresses that Silybum marianum (milk thistle) fulfills several key functions for liver health: it neutralizes toxins in the liver vessels, prevents toxins from entering the liver cells, supports the repair and creation of new liver cells, and stimulates bile production and the cleansing of the bile ducts. Milk thistle is said to help particularly with a high rT3 value.
Abenavoli, L., Capasso, R., Milic, N., & Capasso, F. (2010). Milk thistle in liver diseases: past, present, future. Phytotherapy research : PTR, 24(10), 1423-1432. https://doi.org/10.1002/ptr.3207
Glutathione is regarded as one of the strongest antioxidants the body makes itself. It plays an important role in reducing oxidative damage, which can play a part in autoimmune conditions such as Hashimoto's.
Oxidative stress plays a real part in disrupting the conversion of T4 into the active thyroid hormone T3. Research from 1980 identifies glutathione as a key factor: a glutathione deficiency, often the result of raised oxidative stress, can negatively affect that hormonal conversion and so disrupt thyroid function. In addition, a 2012 study shows that glutathione levels are significantly lower in Hashimoto's patients specifically than in healthy controls.
Imai, Y., Kataoka, K., & Nishikimi, M. (1980). A possible function of thiols, including glutathione, as cofactors in the conversion of thyroxine to 3,3',5-triiodothyronine in rat liver microsomes. Endocrinologia japonica, 27(2), 201-207. https://doi.org/10.1507/endocrj1954.27.201
Goswami, A., & Rosenberg, I. N. (1988). Effects of glutathione on iodothyronine 5'-deiodinase activity. Endocrinology, 123(1), 192-202. https://doi.org/10.1210/endo-123-1-192
Rostami, R., Aghasi, M. R., Mohammadi, A., & Nourooz-Zadeh, J. (2013). Enhanced oxidative stress in Hashimoto's thyroiditis: inter-relationships to biomarkers of thyroid function. Clinical biochemistry, 46(4-5), 308-312. https://doi.org/10.1016/j.clinbiochem.2012.11.021
Choline is the nutrient your liver uses to package fat and ship it out of its cells. When choline runs short, the fat stays behind - and a liver busy with fat converts less T4 into T3. The premium formula raised choline from 50 mg to 90 mg a day.
In a controlled feeding study at the University of North Carolina, 77% of men and 80% of postmenopausal women developed a fatty liver or muscle damage within 6 weeks on a low-choline diet. Among premenopausal women it was 44%. The reason: estrogen drives the body's own choline production, so after menopause the diet has to cover it.
A 2012 study of 4,648 adults found a fatty liver in 30% of people with an underactive thyroid, against 20% of matched controls. The more underactive the thyroid, the higher the rate, even with TSH only at the top of the normal range.
The National Institutes of Health confirms that choline contributes to normal liver function and normal fat metabolism, from 82.5 mg a day.
Fischer, L. M., daCosta, K. A., Kwock, L., Stewart, P. W., Lu, T. S., Stabler, S. P., Allen, R. H., & Zeisel, S. H. (2007). Sex and menopausal status influence human dietary requirements for the nutrient choline. The American journal of clinical nutrition, 85(5), 1275-1285. https://doi.org/10.1093/ajcn/85.5.1275
Chung, G. E., Kim, D., Kim, W., Yim, J. Y., Park, M. J., Kim, Y. J., Yoon, J. H., & Lee, H. S. (2012). Non-alcoholic fatty liver disease across the spectrum of hypothyroidism. Journal of hepatology, 57(1), 150-156. https://doi.org/10.1016/j.jhep.2012.02.027
EFSA Panel on Dietetic Products, Nutrition and Allergies (2011). Scientific Opinion on the substantiation of health claims related to choline and contribution to normal lipid metabolism (ID 3186), maintenance of normal liver function (ID 1501) and contribution to normal homocysteine metabolism (ID 3090). EFSA Journal, 9(4), 2056. https://doi.org/10.2903/j.efsa.2011.2056
Zeisel, S. H., & da Costa, K. A. (2009). Choline: an essential nutrient for public health. Nutrition reviews, 67(11), 615-623. https://doi.org/10.1111/j.1753-4887.2009.00246.x
The dandelion, with its striking yellow flowers and toothed leaves, is particularly valuable for the liver and gallbladder. Its bitter compounds stimulate the production of digestive juices, support fat digestion and promote bile secretion - which relieves the liver and eases digestive complaints.
Several studies referenced in the Journal of Plant Medicines illustrate the broad health benefits of dandelion root extract for the liver. One study in 96 cases of chronic hepatitis B showed a significant improvement in the group given dandelion. Dandelion root is also linked to increased production of glutathione, which plays a key role in antioxidant protection and detoxification.
Selenium is an essential trace element the body cannot make itself and must take in through food. It plays a critical role in thyroid function, especially in the conversion of the thyroid hormone thyroxine (T4) into active triiodothyronine (T3). A chronic selenium deficiency can therefore lead to an underactive thyroid.
The Converter uses L-selenomethionine, the organic form in which selenium occurs in food such as Brazil nuts. The body absorbs and retains it better than inorganic selenite. 50 mcg a day covers 91% of your Daily Value, and selenium contributes to normal thyroid function.
Selenium supplementation in patients with an underactive thyroid reduced thyroid autoantibodies, lowered TSH levels, lowered the fT4/fT3 ratio, reduced oxidative stress and the body's inflammatory status, and improved quality of life and the structure and volume seen on thyroid ultrasound. Studies from 2015 and later from 2017 support selenium alongside levothyroxine as worthwhile in an underactive thyroid.
Filipowicz, D., Majewska, K., Kalantarova, A., Szczepanek-Parulska, E., & Ruchała, M. (2021). The rationale for selenium supplementation in patients with autoimmune thyroiditis, according to the current state of knowledge. Endokrynologia Polska, 72(2), 153-162. https://doi.org/10.5603/EP.a2021.0017
Duntas, L. H., & Benvenga, S. (2015). Selenium: an element for life. Endocrine, 48(3), 756-775. https://doi.org/10.1007/s12020-014-0477-6
Yu, L., Zhou, L., Xu, E., Bi, Y., Hu, X., Pei, X., & Jin, G. (2017). Levothyroxine monotherapy versus levothyroxine and selenium combination therapy in chronic lymphocytic thyroiditis. Journal of endocrinological investigation, 40(11), 1243-1250. https://doi.org/10.1007/s40618-017-0693-z
Kelvin Labs is a young American company, based in Boston, Massachusetts, and the first supplement maker focused 100% on supporting thyroid health. The mission: to help more than a million people with an underactive thyroid feel better about life over the next 5 years.
Kelvin Labs
Boston, MassachusettsCustomer service: support@getkelvinlabs.com
Welcome to Kelvin Labs, Boston, Massachusetts. These terms keep things clear and fair for both of us. By placing an order you agree to them.
The Converter is a dietary supplement in capsule form: a liver & thyroid support complex that supports the conversion of T4 into T3. It is designed to support your body, not to diagnose, treat or cure any disease. A dietary supplement is not a substitute for a varied diet and a healthy lifestyle. Results vary from person to person. Pregnant, breastfeeding, on medication or living with a condition? Check with your doctor first. Nothing on this site is medical advice.
When you order, you confirm the payment details are yours and the information you give us is correct. All prices are in US dollars. Offer prices and discounts apply at the moment of ordering and may change afterwards.
You can buy as a one-time purchase - you pay once at the price shown at checkout ($59.95 for 1 jar plus $5.95 shipping, $134.85 for 3 jars, $239.70 for 6 jars) with no further deliveries or charges - or as a Subscribe & Save order, where the same pack is delivered and charged automatically at up to 25% off ($44.95 / $119.85 / $209.70) every 30, 90 or 180 days until you cancel. You can pause, skip or cancel a subscription at any time with no minimum term. Questions about your order? Email support@getkelvinlabs.com. We answer every email, so you always know where you stand.
We ship across the United States. Orders are usually processed within 1 to 2 business days and delivered within 3 to 5 business days after that. Delivery times are an honest estimate. Occasionally a carrier is delayed and that is outside our control. You can always email us about the status of your order.
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Contact: Kelvin Labs, Boston, Massachusetts · support@getkelvinlabs.com
We want you to try The Converter with complete peace of mind. That is why every order comes with our 90-day money-back guarantee.
You have a 14-day cooling-off period from the day of delivery. On top of that we give you 90 days from the delivery date to decide whether The Converter is right for you.
Not satisfied? Email us at support@getkelvinlabs.com with your order number. We usually reply within 1 business day.
We may ask you to return the jars from your order, including empty ones, to the returns address we give you. Return shipping is at your cost.
Once your return is confirmed, we refund the full product price to your original payment method, usually within 5 to 10 business days.
The 90-day guarantee applies to one order per customer and per household, so everyone gets a fair chance to try the product. Your 14-day cooling-off period is separate from this and always applies.
Subscriptions: you are never locked in. Pause, skip or cancel any time by email and no further deliveries or charges are made.
Send us a photo within a few days of delivery and we send a free replacement. No need to return it.
If something goes wrong with your order, please contact us first before contacting your bank. We resolve almost every case quickly, and for you that is usually a good deal faster too: support@getkelvinlabs.com