are b12 injections more effective than tablets vs. Oral Supplements: Which Is Better? Best Vitamin B12 Injection Site:

7 Compared with placebo, patients taking metformin had an increased risk of vitamin B 12 deficiency (number needed to harm = 14 per 4.3 years) and low vitamin B 12 levels (number needed to harm = 9 per 4.3 years)

UK guidelines, primarily from NICE Clinical Knowledge Summary and the British National Formulary (BNF), provide evidence-based recommendations for treatment

Factors like aging, alcohol consumption, and environmental toxins can impact how efficiently B12 is processed, leaving you feeling depleted

Its most likely to occur in people who: smoke consume a limited variety of food have nutrient absorption problems Vitamin C injections are approved by the U.S