how long to b12 injections last Does It Take For Work? B12 Injection Dosage and Frequency:

Vitamin B12 promotes healthy neurological function and is essential for a healthy immune system

I have also read that low levels of potassium can cause cardiac symptoms so I hope GP tests potassium

Sociodemographic characteristics Diagnosis (vitamin B12 deficiency or pernicious anaemia), age, sex, education level, employment status, country of residence (England, Wales, Scotland, Northern Ireland, Republic of Ireland), region of residence (nine English regions, according to the Office for National Statistics, Wales, Scotland, and Northern Ireland) were assessed using the questions in Supplementary Table S1

Besides the inefficiency of leptin analogues as monotherapy, combinations of leptin with amylin (15), fibroblast growth factor 21(FGF21), exendin4, (16), or a GLP-1/glucagon co-agonist (17) were proposed

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