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B12 and B-complex options are common for energy and focus
Risks and Side Effects While generally safe, vitamin B12 injections can have side effects or risks, such as: Mild pain, swelling, or redness at the injection site Dizziness, headache, or nausea Allergic reactions (rare) Hypokalemia (low potassium levels) in individuals with severe deficiency undergoing treatment People with allergies to cobalt or who have Lebers disease should avoid B12 injections unless specifically advised by a doctor
(More information) Variations in the sequence of genes coding for Phase II detoxification enzymes, glutathione S -transferases (GSTs), may influence the potential health benefits of consuming cruciferous vegetables
Thromb Haemost 81 : 165176
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