Lack of corresponding events in the blood that take place during a natural insulin spike. Did you even look at the medical evidence prior to making this thread?
~~~~Another crucial part of the prosecution's case were blood samples from babies who had collapsed with low blood sugar.
They showed exceptionally high levels of insulin and low levels of a substance called C-peptide.
That combination is only generally seen when the body takes in synthetic insulin, leading to the charge that Letby had deliberately poisoned the babies by adding it to their nursery feed bags.
Prof Alan Wayne Jones, an expert in forensic toxicology, is one of those who has challenged the results.
He pointed out that the test used measures the body’s reaction to insulin rather than the substance itself.
"The problem is that the method of analysis used [in these two cases] was probably perfectly good from a clinical point of view, but not a forensic toxicology point of view," he said.
"That test cannot differentiate between synthetic insulin and insulin produced by the pancreas."
The testing lab’s own website states that if synthetic insulin is suspected, the results should be verified externally by a specialist centre.
Clinicians at the Countess of Chester did not do that because thankfully both babies recovered.
At the time, there was no suspicion of deliberate harm.
Prof Jones said he has no doubt they suffered sharp drops in blood sugar levels, but that there could be another natural explanation for why that had happened. ~~~~
Medical evidence? Simple facts like the one detailed above are readily available in the mainstream media.