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If your body doesn't get enough vitamin B12, your red blood cells become too large
Its activity profile is best understood as systems-level polypharmacology rather than single-receptor agonism: published research has documented effects on nitric oxide system signalling, growth-factor receptor expression (including VEGF receptor 2 and growth-hormone receptor), dopamine and serotonin pathway markers, and angiogenic factor regulation
Pre-existing conditions: Generally safe even with most health conditions since it doesn't affect blood sugar, blood pressure, or hormone levels
More serious B12 deficiencies have the potential to impair heart and neurological function, leading to a wide range of serious symptoms, including but not limited to tinnitus, severe joint pain, memory problems, depression, anxiety, poor muscle function, ataxia and changes in reflexes
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