Sterile Is Not the Same as Safe: A Recall Worth Understanding

In August a compounding pharmacy in Austin, Texas voluntarily recalled three lots of injectable glutathione after testing found elevated endotoxin levels. Patients had reported nausea, vomiting, tachycardia, which means a racing heart, and reactions at the injection site.

The FDA language around this is unusually blunt. Anaphylactic shock and death are associated with high endotoxin levels in injectable products.

Glutathione is a tripeptide, three amino acids joined together, sold widely in wellness clinics. But the specific product matters less than the failure mode, because this one can affect any injectable peptide and most people buying them have never heard of it.

What an endotoxin actually is

Endotoxins are fragments of the outer wall of certain bacteria. Here is the part that surprises people:

Killing the bacteria does not remove them.

An endotoxin is not alive. It is a piece of molecular debris, and it is remarkably heat stable. You can sterilize a solution, destroy every living organism in it, and be left with a perfectly sterile liquid that still carries enough bacterial fragments to make someone quite ill. Your immune system recognizes those fragments as evidence of infection and mounts a response accordingly, which is why the symptoms look like a sudden illness: fever, chills, nausea, a racing heart.

So sterile and safe are not the same claim. A product can pass a sterility test and fail an endotoxin test. They are measured separately, endotoxins by a specific assay that has nothing to do with culturing bacteria.

Why no certificate of analysis will catch this

This connects directly to something we wrote about this week, when a peptide vendor was sentenced over forged lab certificates. There the problem was fake documents. Here the problem is real documents that measure the wrong thing.

A standard purity certificate reports chromatography and mass spectrometry results. Those answer two questions: is this the molecule it claims to be, and what proportion of the contents is that molecule. Both are worth knowing.

Neither detects bacterial contamination. A vial can be 99 percent pure peptide by chromatography and still contain enough endotoxin to send someone to hospital, because the endotoxin is part of the remaining fraction that the test was never designed to characterize.

If you have been treating a purity percentage as a general safety score, this is the gap in that reasoning.

Three different ways a vial goes wrong

Between this year's cases there are now three distinct failure modes on record, and they have almost nothing to do with each other.

• Chemical impurities from synthesis. Peptides are built one amino acid at a time and steps fail, leaving truncated or misassembled chains. This was the FDA's objection when its advisory panel rejected DSIP for compounding in July.
• Biological contamination during compounding or handling. That is this recall. It happens after synthesis, in the pharmacy, and no amount of chemical purity prevents it.
• Human error at the point of injection. The dosing mistakes behind more than 1,700 adverse event reports for compounded GLP-1 products, where people drew the wrong volume from a vial.

A product can be flawless on two of these and still harm someone through the third. Any single test or certificate covers one of them at best.

A relevant detail about this product

Glutathione does not have FDA approval for compounding under the rules governing this type of pharmacy, and holds only a dietary supplement designation rather than a pharmaceutical one. This is not the first time it has caused trouble either. An endotoxin outbreak in 2019 already prompted regulators to warn against compounding it for injection.

A known problem, a prior warning, and a repeat seven years later is a reasonable thing to be annoyed about.

What to do

If you inject any compounded peptide:

• Keep your lot numbers. Recalls are announced by lot, and without that number you cannot tell whether yours is affected.
• Know which pharmacy made it, and check whether it is licensed in your state. Several unlicensed operations shipping across state lines have been identified this year.
• Learn what a reaction looks like. Fever, chills, a racing heart, or vomiting starting within hours of an injection is not a normal side effect and warrants medical attention rather than waiting it out.
• Do not judge by appearance. Endotoxin contamination is invisible. A clear solution in a clean vial tells you nothing.

None of this means compounded products are inherently unsafe. A licensed compounding pharmacy operating properly is a considerably better source than an anonymous website, which is the whole argument behind the current regulatory push. It means that safety is made of several separate things, and buying the one that gets advertised does not get you the others.

Source: Partnership for Safe Medicines: compounded peptide injections recalled over high endotoxin levels.