In the blood, about 80% of cobalamin is bound to haptocorrin, forming holohaptocorrin, a complex that has a dual function: (1) holohaptocorrin conveys cobalamin to the liver, where it taken up through endocytosis (mediated by asialoglycoprotein receptor, ASGPR)
From acetaminophen, the P-450 system forms an intermediate metabolite referred to as NAPQI, which turns out to be a toxic compound
A study in mice and human tissue, published in Nature , shows that cancer cells can break it down and use it as fuelparticularly the cysteine it containspromoting tumour growth and survival
Several other factors may also contribute to raised homocysteine and impaired methylation
In-house-only testing is a red flag for a peptide this complex