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it depends on your age and comfort level
Weeks that feel foggy or fragile, even when your labs are stable
A small 1000-microgram injection of vitamin B12 is enough to boost energy, focus, alertness, memory, immunity, and mood for more than 72 hours, making it the best (and safest) all-natural energy shot available, anywhere
Enhanced Mental Clarity If you struggle with brain fog, B12 shots can support focus, memory, and cognitive performance
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doi: 10.3390/jcm9020474
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