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Hello, I started my loading doses just over a year ago and ended up resorting to SI as many do around Nov 2020 as I had ongoing neuro symptoms (tingling & numbness in hands & feet, some shooting nerve pains in fingers)
Do B12 Injections Help with Fatigue
The rationale lies in its influence on neurotransmitter systems involved in memory and cognitive function
Vitamin B12 deficiency leads to hematological alterations, neurological issues, and psychological issues that might manifest as irritability, depression, and sometimes memory loss
Covalent modification of proteins by metabolites of NAD+
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