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However, with direct injection, if you do not need the additional B12, it may result in high levels in your blood that can cause side effects including gastrointestinal issues, headache and dizziness, tiredness and weakness, or skin irritation until the excess is flushed out via your kidneys and urine
Historical Background and Scientific Context Scientific interest in metabolic regulatory enzymes expanded rapidly during the late twentieth century as molecular biology techniques improved
It also supports memory, learning, and may help lower the risk of cognitive decline
He proposed that a single 500mcg injection could be equally effective
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