Serious and rarer side effects can include muscle cramping, irregular heartbeat, shortness of breath, slurred speech, vision changes, chest pain and weakness on one side of the body
However, those with allergies may face some side effects that may lead to something serious
Large amounts of B12 can potentially interact with some drugs used for diabetes, heartburn, seizures, and more
A well-known study from UCLA found that B12 supplementation alters the gene expression of C- acnes (formerly P-acnes ), the bacterium linked to acne
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CAN I TAKE A B12 SUPPLEMENT INSTEAD OF AN INJECTION