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Common Side Effects When side effects occurred, they were typically mild, transient, and similar in frequency to placebo groups: Reported Adverse Effects Most Common (occurring in small percentage of participants): Mild to moderate headaches (most frequently reported, often resolving with continued use) Injection site reactions (minor redness, swelling, or irritation at injection site) Gastrointestinal effects (particularly at higher oral doses: mild nausea, diarrhea, flatulence) Fatigue (reported occasionally during initial adaptation period) Rare Events: One case of chest tightness was deemed possibly related to treatment in safety trials
Taking B12 capsules when youre not deficient can lead to side effects, have virtually no benefits, and just be a waste of $$$
Anemia develops from B12 deficiency, as the vitamin is engaged in the production of healthy red blood cells
It remains mainly at the animal experimental stage, lacking clinical trial data in humans
