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With a daily symptoms chart/diary, it would be easy to demonstrate where improvements are starting to make your life easier- and if they don't and you continue to worsen, B12 is a harmless vitamin and you will be that bit nearer to your neurologist appointment
AAFP (2017, with ongoing relevance)
If you didnt already know, serotonin levels have a role in regulating both deep sleep and alertness
In addition, the GRAS or food additive status of a flavor intended for use in food is not relevant to other intended uses (e.g., inhalation). Basically, a company informs the FDA that it is compliant with the agencys regulations, but the FDA does not perform its own investigation into a companys purported ingredients in the GRAS notification process
After restrictive surgery (gastric band), vitamin B 12 deficiency is not uncommon and can affect 10% of patients [56], but is less harmful when patients take multivitamins
