Selling tubers for lemons
The last months more and more is claimed that HPU is merely a new name for KPU. In this way, a specific lab with more than one name, wants to sell a KPU test for an HPU test. Is that true? No it is not! This claim is misleading and will cause that many customers perform a test that they do not want at all. Also an HPU test called “haemopyrrollactam test” is offered, which certainly is no HPU-test, but a simple KPU-test. The HPL-complex that is excreted in the urine, can only be determined in the laboratory with elaborate methods of investigation, and the price is between 50-65 GBP. If an HPU test offered for 25 GBP or even less, it is clear that not a HPU test, but another test is performed.
Therefore, it is clear that HPU cannot not be the new name of the KPU. It would be, as it is said that D-lactate, causing people to die by acidosis (if the concentration in the blood is too high for instance with the Short Bowel Syndrome), would be the same as L- lactate, which you can simply metabolize and that only causes diarrhoea and gas formation at high concentrations or with lactose intolerance.
Literature: Malvaria (HPL) or mauve factor is often mistakenly referred to as kryptopyrrole (KP) or pyrroluria. This due to studies incorrectly classifying mauve and KPU as the same substance, owing to similarities in the chemical structure. Mauve factor or hydroxyl-haemopyrrolin-2-one (HPL) is produced through hydroxylactam or haemopyrrole and not of kryptopyrrole. Therefore the terms pyrroluria or kryptopyrrole should technically not be used interchangeably to refer to mauve factor or malvaria.
In: Clinical Naturopathy an evidence-based guide to practice. J. Sarris en J. Wardle 2nd Edition (2014) Elsevier Australia.