Useful Diagnostic Tests Serum Vitamin B12 Complete blood count Serum folate
1,2 It is coabsorbed with intrinsic factor, a product of the stomach's parietal cells, in the terminal ileum after being extracted by gastric acid 1,2 (Figure 1 3 )
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If you are currently using sublingual or oral forms of B12 and you are getting symptomatic relief then I wouldnt recommend changing up your method of administration
Possible side effects include[10]: Bloating or abdominal discomfort Nausea or vomiting Diarrhea Headaches Dizziness or feeling lightheaded Flushing or low blood pressure Rare but serious reactions, such as allergic responses or irregular heartbeat, have been reported, especially in individuals with heart conditions
Long-term protocols (12+ weeks) require fasting glucose and HbA1c monitoring every 8 weeks, as chronic GH elevation can reduce insulin sensitivity by 1020% in some research models