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HDL-4 p=7.73E-03)
Once your B12 levels are maintained, you may need injection after 3 to 6 months of gap
Clinical studies demonstrate that 200 mg of paraxanthine enhances memory, reaction time, and attention for up to 6-hours in young healthy adults [8], and that acute ingestion as low as 50 mg of PXN for 7-days enhances measures of cognition, memory, reasoning, response time, and helped sustain attention [9]
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