Its a partial sequence of a protein found naturally in human gastric juice
But- It may, again, may, we don't know, have some safety issues that still need to be resolved, making Sirmirelin and Tesamirelin, at least to my mind, better options should you decide to go down this path

Haematological symptoms often appear first and include: Fatigue and weakness due to anaemia Pallor (pale skin) Shortness of breath, particularly on exertion Heart palpitations Glossitis (sore, red tongue) Mouth ulcers Neurological manifestations can be particularly concerning and may include: Paraesthesia (pins and needles) in hands and feet Peripheral neuropathy causing numbness or altered sensation Difficulty walking or balance problems (ataxia) Memory problems and cognitive difficulties Mood changes, including depression or irritability Rare optic neuropathy in severe cases Other symptoms that may occur include: Digestive disturbances Loss of appetite and weight loss Generalised weakness It is crucial to note that neurological symptoms can occur even in the absence of anaemia, and you should contact your GP urgently if you experience persistent paraesthesia, balance problems, memory difficulties, or unexplained neurological symptoms

KPV inhibits NF-kB, the master switch for inflammatory gene expression in the body
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The following critical factors helped us to select our top picks: Bioavailability: How B12 can be consumed and utilized by the body