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Running a B12 deficitwhich about six percent of Americans under the age of 60and 20 percent of those over 60 do (1)puts you at risk for muscle weakness, fatigue, depression, memory issues, erectile dysfunction, and a cluster of symptoms that can be so severe that theyre debilitating
If you don't have a deficiency, you probably won't notice any benefits from a B12 shot, especially since any excess is simply excreted through urine
Technical support helps researchers to optimize protocols and answer application specific questions
Prevents tolerance
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