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A dose of 100 mcg daily for six or seven days should be administered by intramuscular or deep subcutaneous injection

Oral B12 vitamins rely on your stomachs acidity and intrinsic factor for absorption, which can be variableespecially if you have gut issues or take acid-blocking medications

Conservative cycles of 6 weeks on and 3 weeks off suit first-time users or those with sensitivity concerns

However, if you continue to experience depressive symptoms even with regular exercise, you should contact your doctor

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16 B12 has a half-life of approximately six days in the blood, which usually means that it takes around six days before half of the injected amount is eliminated from the body