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As of 2026, yes through exactly one vetted program
According to NHS guidelines: Below 200 ng/L (148 pmol/L) Generally indicates deficiency Below 100 ng/L (75 pmol/L) Usually shows clinical or metabolic evidence of deficiency Most healthy people have levels around 500 ng/L However, its worth noting that some people experience symptoms even with B12 levels in the normal range, particularly older adults
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Research indicates that optimal levels of glutathione are absolutely required to protect the integrity of mitochondrial DNA, which is highly vulnerable to oxidative mutation
This is why many providers prefer 20mg/ml for patients they expect to titrate to higher doses
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