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PMC 6692182
High-dose methionine (above 100 mg per injection) can elevate homocysteine levels in susceptible individuals, increasing cardiovascular risk if used long-term without folate co-supplementation
Neurological damage that has been present for more than six months may show limited or incomplete recovery, highlighting the importance of early diagnosis and treatment
B12 plays multiple roles in keeping you healthy, supporting nerve and blood cell health, and helping your body produce DNA
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