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Published literature can inform starting ranges for related experimental designs
Overall, B12 injections offer significant physical and mental health improvements
Adequate levels can prevent nerve damage, which helps improve coordination and reduce tingling sensations
How long you feel the effects can depend on your starting levels, which is why people with a larger deficiency sometimes notice the benefits over a longer stretch
B12 deficiency can cause fatigue and slow metabolism
Apply a small amount to a discrete area, wait 24 to 48 hours, and check for reaction before proceeding with scalp application
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