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We strongly recommend it, but no - you do not have to have one if you choose not to, though we do explain why this is storngly recommended
Some people are at much higher risk than others
Regularly monitor your nutrient levels and consider zinc supplementation if necessary after consulting a healthcare professional
Vitamin B12 is remarkably safe with virtually no risk of toxicityas a water-soluble vitamin, your body eliminates excess amounts through urine
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