diabetes, but B vitamins need to be used carefully because both deficiencies and excessive supplementation can cause problems.
4. B Vitamins, Especially B6 and B12
Vitamin B12 is essential for normal nerve function and red-blood-cell formation. A vitamin B12 deficiency can contribute to numbness, tingling, weakness, and other neurological symptoms.
People taking metformin for diabetes can be at increased risk
of vitamin B12 deficiency over time, making periodic monitoring particularly relevant for some patients.
Vitamin B6 is also important for normal nervous-system function, but excessive amounts of supplemental vitamin B6
