The meaning of KPU (Kryptopyrroluria) and HPU (Hemopyrrolactamuria)

Christoph Hinterseher, Veterinarian, Munich  The terms KPU (Kryptopyrroluria) and HPU (Hemopyrrolactamuria) refer to a metabolic disorder in humans, dogs, (cats), horses, polar bears, alpacas, tigers and hummingbirds. Metabolic stress causes a disturbance in cellular porphyrin ring metabolism, resulting in a constant and high loss of the vital vitamin B6 as well as zinc and manganese. [...]
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