Apology for Statements from RLC Labs in
Study Reports about Hypo Support Formula (HSF):
Compliance with Our Policy of Truth in
Thyroid Science and Thyroid Clinical Practice

Dr. John C. Lowe
April 26, 2010

The subtitle of Thyroid Science makes clear that the journal’s policy is truth in thyroid science and thyroid clinical practice. In compliance with that policy, I have submitted this official apology concerning statements I made in two study reports published in Thyroid Science in 2009. The statements concern the contents of the capsules of RLC Labs product “Hypo Support Formula” or, for short, “HSF.”

Organic or Not? In my study reports, I stated that HSF was an “organic” dietary desiccated thyroid product. At the time, respecting expressed concerns by RLC personnel about "trade secretes," I had accepted the claim that the product was organic made by a major official of RLC Labs. I failed to obtain documentation from RLC Labs that HSF was indeed certified organic.

Subsequently, the same RLC official told me the company had switched its source of raw thyroid tissue from New Zealand (blond colored powder) to a source in Argentina (brown color). He admitted that the Argentine tissue was not certified organic. My tests of capsules of the brown Argentine powder showed that it was approximately 20% less potent than the blond powder.

Thyroxine-free or Not? I was told by the RLC Labs official that the FDA required that all thyroid powder imported into the US and intended to be sold as dietary desiccated thyroid had to be free of thyroxine (T4). He also stated that this indicated that all the other hormones remained in the powder.

At the time, I had no knowledge of the dietary desiccated thyroid industry. I knew only what RLC officials told me about the industry from acquiring raw thyroid tissues to production of the final product. Any knowledge I had at the time of dietary desiccated thyroid was limited to (1) some clinical experience with patients who had used such products, (2) information given to me by RLC Labs officials (limited by their "trade secrete" concerns), and (3) data I was accumulating through my ongoing clinical experiments with HSF. Because of this, I accepted as true what the RLC Labs official told me: that T4, and T4 only, was removed from HSF, leaving all the other natural contents of the raw thyroid tissue.

Subsequently, however, through communications with FDA officials, I learned that the agency does not have the policy claimed by the RLC official. I eventually learned though government people the actual source of this incorrect information, which involves another government regulatory agency, not the FDA.

After publishing my two reports of the original HSF that contained the blond powder, I have acquired extensive experience in all aspects of the dietary desiccated thyroid industry. As part of that experience, I received information—although too often truncated information due to the issue of trade secretes—from suppliers of raw thyroid powder. That information has left me with the distinct impression that suppliers do not use a technology that selectively removes T4 and leaves in the tissue powder the other iodinated molecules (T3. T2, and T1). It appears to me that all iodinated molecules are removed.

In addition, after publishing the two reports on HSF, I have tested products labeled "thyroxine-free." My testing of this product and others leads me to believe that the term "thyroxine-free" is synonymous with removal of all iodinated compounds (thyroid hormones) from raw thyroid powder. The products I have tested have been metabolically inert.

The first product I tested that was labeled "thyroxine-free" was RLC Labs' interim research-and- development product called "HSF Plus" (coded "V1.5"). My testing showed that the product had no metabolic potency whatever. However, RLC has never labeled HSF itself as thyroxine-free, and my testing of HSF capsules containing the blond and brown powders showed that it had metabolic potency, although the brown powder was approximately 20% less potent.

The bulk of the evidence available to me, then, leads me to the opinion that HSF is not thyroxine-free. My opinion is that it contains whole bovine thyroid gland tissue.

Potential Misguidance of Customers. It has been brought to my attention that my study reports published in Thyroid Science are being made available by some marketers of HSF to stimulate sales. Contained in those distributed reports is my statements that the product is organic. This statement, which may or may not have been true at the time, is possibly misleading consumers. Even if the original source of the powder in HSF was organic—which I have no evidence of—the RLC official informed me that the company's Argentine source was not certified organic. To prevent misleading those who may consider purchasing HSF, we have corrected the undocumented statement in my reports that the product is organic.

In keeping with the official policy of truth in publications in Thyroid Science, I report here that (1) I failed to verify through documentation that the original HSF that I tested (blond capsules) was organic, (2) to make clear in my reports that my statement that the product was organic was based solely upon claims by a major RLC Labs official, and (3) that statements I made based on RLC Labs officials that HSF was "thyroxine-free (which I had experience against which to judge) was most likely false. For these three errors, I extend my sincere apologies to the readers of Thyroid Science and to consumers who may have been mislead by my published statements that HSF was organic.

Subscribe free to
Thyroid Science through
your email address:


Journal Staff

Latest Publications

 Authors' Guidelines

How to Submit
for Publication

How to
Submit Letters

  powered by FreeFind

Thyroid Science publishes papers under the Creative Commons Attribution License






Sections of
Thyroid Science

Clinical &
Laboratory Studies

Case Reports






Letters & Brief
































© Thyroid Science 2010