Phasea Conversion Complex Review: Trial Claims, Refund Rules and Refills

Phasea Conversion Complex promises women on levothyroxine that a capsule restarts the liver step where their thyroid pill supposedly stalls, and a gallery graphic cites a 412-woman trial.

We read the label, the policies and the checkout, then went looking for the trial, the doctor and the papers the page cites.

Overview

What Phasea Conversion Complex Promises

The store at phasea.co sells Conversion Complex, two capsules a day of milk thistle, dandelion, artichoke, choline, glutathione and selenium, aimed at women over 40 with thyroid conditions.

The pitch is that levothyroxine supplies inactive T4 and this formula helps the liver turn more of it into active T3.

The page ties that conversion to steadier energy, clearer thinking and a moving scale.

A single bottle holds 60 capsules and sells for $39.99, while the preselected five-bottle pack costs $89.99 with automatic refills ticked and $119.99 without them.

What We Found Behind the Pitch

A graphic headed Clinically Proven describes a double-blind, placebo-controlled trial of 412 women, yet it names no journal, authors or registry number, and we found no record on ClinicalTrials.gov.

Of seven readable paper titles on a Backed by 2000+ Studies graphic, we matched only one in PubMed, and it carries a different journal and year.

The refund policy in the footer excludes opened supplement bottles and sale items, while the FAQ says empty bottles are fine under the 90-day guarantee.

At checkout the preselected five-bottle pack renews automatically every 4 weeks at $89.99, although five bottles last about 150 days at the label’s two capsules a day.

What We Could and Could Not Verify

Here is where the evidence stands after our checks:

• Verified by us: the label, the price grid, the preselected pack and refills box, the checkout wording, both refund pages, the cancellation policy and the domain dates.
• Not found: a registered trial, a named laboratory, a certificate of analysis, a manufacturer, a return address or a trace of Dr. Stephanie Gulden.
• Not verified: who owns Phasea Health LLC, what actually ships in the bottle, what the FrontrowMD clinicians think of it, and whether any reviewer’s story is typical.

Our advice is not to buy on the strength of the trial and doctor claims, and to read the refund and refill sections below before you pay.

How the Phasea Offer Works

Step 1: A Pop-Up Promises Up to 64% Off

On first view, a full-screen pop-up offers up to 64% off plus a free gift and asks you to pick a goal, such as keeping your hair.

It never says what the gift is, and a small No, thanks link closes it. A banner repeats Get Up To 64% Off Today across the store.

The only 64% we could find is the gap between $249.99 and $89.99 on the five-bottle pack, which compares a refill price with five bottles at the $49.99 regular price.

Against what the same pack costs when bought once, $119.99, the saving from refills is 25%, which is the figure the refills box itself advertises.

Step 2: The Product Page Preselects Five Bottles and Refills

The product page offers three packs: one bottle at $29.99, three for $59.99 and five for $89.99, each with a crossed-out price beside it.

Those are the refills prices. The store’s product data lists one-time prices of $39.99, $79.99 and $119.99, so the per-bottle figures of $20.00 and $18.00 are subscription prices.

When the page loads, the five-bottle pack is the selected radio button and the Save 25% with automatic refills box is ticked, which we confirmed by reading the form state.

The Add To Cart button shows $89.99 beside $249.99, a 75% Sold bar sits above the packs, and a line below says Cancel Anytime and Refills Ship Every 4 Weeks.

Pressing Add To Cart skipped a cart page and opened the checkout directly, so the first full view of the order is the payment page.

Step 3: The Checkout Shows the Renewal Terms

The checkout lists Phasea Conversion Complex, Buy 3 Get 2 Free, Deliver every 4 weeks, $89.99, with shipping to be calculated after you enter an address.

Near the bottom, a sentence says your subscription renews automatically at the price shown, every 4 weeks, until you cancel in your account portal or by email.

That disclosure is plain and visible, so the risk is not hidden wording. It lies in what the preselected pack means once the renewals begin.

The checkout header says 4.8 out of 5 based on 12,000+ reviews, while the product page counts 3,270+ reviews.

The home page uses 12,000+ for the women it says have tried the product, which is a different count from reviews.

The Email me with news and offers box is ticked by default. We stopped here and entered nothing, so we cannot describe later steps or any upsell.

Step 4: Renewals Arrive Every 4 Weeks

The cancellation policy says the subscription renews on its own every 4 weeks, charging the subscription price of the bundle you chose, plus tax and any shipping.

Taken literally, a buyer who starts with five bottles is charged $89.99 on days 0, 28, 56 and 84, which is $359.96 for 20 bottles by week 12.

A daily user takes two capsules, so by then they have finished fewer than three bottles. Whatever stays unopened would need an approved return, as Step 5 explains.

In the company’s favor, the policy promises an email before every renewal, lets you skip, delay, pause or shrink the bundle, and asks for cancellation 24 hours before the charge.

It also says that if you cancel after a charge, that order is not automatically refunded and still ships, and that cancelling is not treated as a refund request.

Step 5: The 90-Day Guarantee Meets the Refund Policy

The home page FAQ says to email, send back whatever is left and that empty bottles are fine. The product page promises no hoops and no return-shipping headaches.

The refund policy in the footer is stricter: items must be unused and in original packaging, and a return needs prior approval or it will not be accepted.

The same policy makes opened or unsealed supplement bottles and sale items non-returnable, but it does not say what counts as a sale item.

The product page labels the single bottle Sale price $39.99 against Regular price $49.99, and every pack shows a crossed-out price, so the exclusion could reach almost any order.

The Terms of Service point to a different refund page that has the 90-day text and the sale-item line but no opened-bottle exclusion, so two live pages give different rules.

Outside the United States, the policy makes the customer pay return shipping unless the item is defective or wrong, which sits awkwardly beside the promise of no return-shipping headaches.

The timeline matters too: the page expects weight and metabolism to respond by weeks 6 to 8 and full benefit by day 90, yet the policy excludes opened bottles.

One Trustpilot reviewer wrote in early October that the returns page then said 30 days. We cannot verify that, but the live pages now say 90.

The Clinical Trial Graphic Gives Nothing to Check

One image in the product gallery is headed Clinically Proven on Real Women With Thyroid Issues, and it is the strongest claim on the page.

It describes 412 women studied for more than 3 months in a double-blind, placebo-controlled trial run by an independent, peer-reviewed research lab over 12 weeks.

Its table gives 74% for energy at week 3, 79% for less shower-drain hair at week 6 and 86% for baby hairs and brain fog at week 8.

The final row claims 12 lbs of average weight loss for 88% of users, and a banner says 93% of participants kept taking Phasea afterward.

The graphic gives no journal, authors, laboratory name or registration number, and its success rates show no comparison with the placebo group.

A search of ClinicalTrials.gov for Phasea and Conversion Complex returned no study of this product. Trials of that size are often registered, though a missing record proves nothing.

Elsewhere the site says its 93.2% energy figure and 87.3% reorder rate come from internal customer survey data, and the product FAQ rounds the energy figure to 94%.

The FTC’s health products guidance says claims about a study must match the research, and that improvement inside a treated group does not show an advantage over placebo.

The file behind the graphic carries a July 24, 2026 stamp in its name, so the image is recent, whatever the age of the study it describes.

Until Phasea names the trial, treat Clinically Proven as a slogan. A claim that rests on a peer-reviewed trial can be checked, and this one currently cannot.

What the Science Says About the Liver and T4 to T3

The home page says up to 80% of your T4 becomes active T3 in the liver, and a gallery graphic repeats it beside four drawings of a healing liver.

A third graphic quotes a 2006 Journal of Clinical Investigation paper by Bianco and Kim as saying the liver accounts for about 60% of daily T3 production in humans.

We opened that paper, Deiodinases: implications of the local control of thyroid hormone action, and searched its text. The quoted sentence and the 60% figure are not in it.

The paper says tissues outside the thyroid make about 80% of daily T3, and that type 2 deiodinase rather than type 1 is thought to be the main source.

That 80% resembles the paper’s figure for every tissue outside the thyroid, not for the liver alone.

The paper mentions the liver only in passing, in passages on critically ill patients and knockout mice.

Selenium is a real part of the story, because the deiodinase enzymes are selenoproteins, and the label’s 50 mcg is listed at 91% of the Daily Value.

Whether extra selenium helps is a different question. A Cochrane review summary of four Hashimoto’s trials with 463 participants rated the evidence incomplete and unreliable for clinical decisions.

Those trials used 200 mcg of selenium, four times Phasea’s dose, and reported lower antibody levels and, in one high-risk study, better well-being, not improved conversion.

We did not find studies showing the other five ingredients improve conversion in people on levothyroxine. A PubMed search combining all six ingredients with hypothyroidism and placebo returned no result.

That suggests nobody has tested this exact combination, which is not the same as showing each ingredient is useless.

The page says every dose rests on clinical research but does not tie any dose to a study.

The Backed by 2000+ Studies graphic shows eight paper cards, and we could read the titles on seven of them.

Only one matches a PubMed record: Selenium and Thyroid Disease: From Pathophysiology to Treatment.

It appeared in the International Journal of Endocrinology in 2017, not Nature Reviews Endocrinology in 2012 as the card says. We found no exact-title record for the other six.

PubMed does not cover every journal, so the cards may cite papers we could not match, but a buyer cannot check them from the page either.

The page also stretches past thyroid support: a healthier liver supposedly lowers cholesterol, one testimonial reports TSH falling from 4.2 to 1.5, and another says blood pressure normalized.

The FDA’s structure and function rules let a supplement describe effects on the body but not claim to treat or prevent disease.

Phasea’s pages carry the required disclaimer, yet the testimonials still lean on lab and blood pressure results.

The FTC adds that an honest testimonial is not enough, because the seller still needs evidence that the product works as it did for the person quoted.

The Doctor, the Badge and the Reviews

A gallery image presents Dr. Stephanie Gulden as a functional medicine doctor and the formulator of Conversion Complex, with a letter about 18 years of telling women labs looked fine.

Her name appears only inside that picture, not in the page text, and the footer links no About page, so a visitor has no biography, license or practice to check.

Searching the web for her name returned nothing relevant, and the federal NPI registry lists 33 providers surnamed Gulden, none named Stephanie.

Not every clinician has an NPI number and a license could be foreign, so this is a reason to ask for her credentials, not proof she does not exist.

The Clinicians’ Choice badge is a live FrontrowMD widget. It opens a panel listing clinicians and states that clinicians are never compensated for taking part.

The same panel says a product counts as shared when it sits on a clinician’s patient discount page, regardless of how closely they reviewed it or how many patients visit.

It adds that this differs from a clinician recommending or prescribing the product to a patient, so 642 clinicians sharing it is not 642 clinicians vouching for it.

The lab-result testimonials come with portraits, and three of them load from files named ChatGPT_Image_Jul_23_2026 and ChatGPT_Image_Jul_28_2026, a pattern that resembles how ChatGPT names saved images.

A file name does not prove how a picture was made, and we cannot say whether those portraits show real customers, but the names are worth asking Phasea about.

Trustpilot lists Phasea with a profile claimed in February 2026, a TrustScore of 2.6 and seven reviews, five of them one star.

It notes that the company has not recently invited reviews and has not replied to negative ones.

Reviewers report getting a different product, one named Docteat, and being refused a refund or told to pay return shipping.

Two say they were charged again without agreeing to a subscription, and others complain of slow delivery.

Trustpilot does not verify reviews and seven is a small sample, so these are reports we could not confirm, but they echo the risks the policies describe.

Who Runs Phasea?

The company named in the documents

The Terms of Service say Phasea means Phasea Health LLC, a Delaware limited liability company doing business as Phasea, which also owns and operates the site.

The only contact we found is support@phasea.co, with no telephone number. The shipping policy promises replies within 1 to 2 hours, while the FAQ says 24.

The Terms contain template leftovers, including a line headed CAP ON LIABILITY (OPTIONAL) and a reminder to show subscription disclosures at checkout, so the pages look pasted in unedited.

The address appears to be shared

The Terms, privacy policy and cancellation policy give 8 The Green, Suite D, Dover, DE 19901 as the address.

That building appears in many company records, and our earlier Seluntra and Oralux investigations met it under other suites.

A web search for Phasea Health LLC found no record, and we could not tell what Suite D is.

A registered address is not a warehouse, so it does not say where returns would go.

The refund policy gives no return address at all. It says that once a return is approved, the company will send instructions on how and where to send the package.

The domain, the platform and the review count

The domain phasea.co was registered on September 12, 2025 through Namecheap, with the registrant hidden, and its record was updated on November 3, 2026. It points to a Shopify store.

The Web Archive holds a single capture of the site, from November 4, 2026, so we could not compare earlier policy wording with today’s.

The page says 12,000+ women have tried the product and shows 3,270+ reviews. A domain 14 months old could reach that many buyers, but nothing public confirms it.

What we could not confirm

We could not confirm the Delaware registration, the manufacturer, the laboratory behind the claimed third-party testing, the facility called FDA registered and GMP-certified, or what reaches buyers.

Facility registration is not product approval. We also did not order, so we cannot judge the capsules, the packaging or how support handles a refund.

What to Do If You Ordered Conversion Complex

1. Save the evidence. Screenshot your order page, the refills line, the confirmation email and both refund pages with the date, because the wording can change.

2. Check what you bought. Look at the bottle count and whether the order says Deliver every 4 weeks, in your confirmation email or Phasea account.

3. Cancel the subscription in writing. Use your account portal and email support@phasea.co at least 24 hours before the next renewal, and keep the confirmation.

4. Ask for the refund in writing. Quote the 90-day guarantee and the FAQ line about empty bottles, then ask for return instructions before you send anything.

5. Do not ship unapproved returns. The policy says unapproved returns are refused, so photograph the bottles and get an approval and an address first.

6. Dispute the charge if it stalls. Contact the company first, then send your card issuer a dispute letter within 60 days of the statement.

7. Ask your prescriber or pharmacist. Show them the label before taking it with levothyroxine, and never change or stop your thyroid medication because of a supplement.

8. Report it. File at ReportFraud.ftc.gov and name Phasea Health LLC, the domain, the refund wording and any product you received that was not Phasea.

Frequently Asked Questions

Is Phasea Conversion Complex a scam?

We cannot call it one: it names a company, posts prices and publishes terms. But its trial, doctor and citation claims could not be checked, and its refund wording conflicts.

Does Conversion Complex work for T4 to T3 conversion?

We found no published trial of this formula and no study showing its ingredients improve conversion in people taking levothyroxine, so the promise is unproven rather than disproven.

Can I get my money back?

The policy offers a refund within 90 days of delivery for unused, sealed items that were approved for return, and it excludes opened bottles and sale items.

Does the $89.99 pack renew automatically?

It does when the refills box is ticked, and it is ticked on load. The checkout says the plan renews every 4 weeks at the price shown until you cancel.

Is it safe with levothyroxine or Hashimoto’s?

The page says yes, but it cites no safety data. Ask your prescriber or pharmacist, because supplements can change how medicines behave and this is not medical advice.

Who is Dr. Stephanie Gulden?

We could not find her. She appears only in a gallery image and the NPI registry lists no Stephanie Gulden, so ask Phasea for her license.

The Bottom Line

Do not buy Phasea Conversion Complex: its trial cannot be checked, its refund rules conflict, and the preselected five-bottle pack renews every 4 weeks.

If you still feel unwell on levothyroxine, take your symptoms and recent bloodwork to your prescriber, and treat any trial claim as unproven until the trial is named.

If you already ordered, cancel the subscription in writing before the next renewal, request approved return instructions, and dispute the charge with your card issuer if Phasea refuses.