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B12 absorption in the gut depends on a protein called intrinsic factor, which declines with age and can be compromised by certain medications and digestive conditions
But over the following two years, his mental health spiralled to such a degree he ended up in a state of psychosis in which he believed his wife was trying to steal his business and his mother-in-law was going to kill him
Food and Drug Administration (FDA) in the same way medications are, some vitamins may not contain the highest-quality ingredients
Whilst the quantities are minuscule and generally harmless, individuals with impaired kidney function may theoretically have reduced capacity to eliminate this cyanide with very high doses over extended periods, though this remains largely theoretical at normal supplemental doses
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