Vitamin B6 is required for tryptophan metabolism, and with insufficient amounts, xanthurenic acid accumulates
There are several causes of vitamin B12 deficiency, including dietary factors, medical conditions, and genetic factors
Adjust your injection volume accordingly
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How Long Does It Take for a B12 Injection to Work
Contact your GP if you experience severe or worsening fatigue lasting beyond 8 weeks, extreme weakness, dizziness or fainting, persistent vomiting preventing adequate intake, or any symptoms suggesting dehydration, anaemia, or other medical concerns