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Getting the dose right is important, as injecting too much can cause unpleasant side effects
However, our English climate means sunshine can be sparse, and many people suffer from low Vitamin D levels which can cause them to feel depressed, tired, have muscle weakness, hair loss and even issues with their bones
[12] Gastric acid-suppressing agents (proton-pump inhibitors and H-receptor antagonists) diminish dietary B12 liberation from protein complexes, a pharmacodynamic interaction that can exacerbate underlying deficiency
So, is it essential to take supplements, or does your food include sufficient amounts of B12 vitamins
Fagelman, Delita and Staff