headaches after b12 injections Feeling worse Injection: Answering concerns Vitamin B12 shots: Uses, benefits,

Why are two different molecular weights reported

Despite its abundance in many foods and availability as oral supplements, a B12 deficiency is relatively common, leading many to seek more direct absorption methods like Vitamin B injections

Since most people are able to consume enough vitamin B12 through their diet, only those who have trouble getting or absorbing enough of the nutrient can benefit from the shot

How does aging affect Vitamin B12 absorption

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Although there is no upper limit for B12, excessive amounts may cause some digestive upset