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Avoid Self-Experimentation Without Medical Guidance Incorrect dosing, poor sterility, or stacking without labs increases risk
International journal of physiology, pathophysiology and pharmacology, 10(3), 132138 Santra, M., Zhang, Z
Lung cancer Although some B complex vitamins may help prevent cancer, there is evidence to show that high volumes of vitamin B12 may increase the risk of lung cancer
Common side effects include temporary redness, swelling, discomfort, and tightness in the treated area
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