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Most members stick with it for 2 to 3 months, since that's usually where the difference becomes noticeable
Low B12 levels have been linked to mood swings, irritability, and even symptoms of depression
Many people who get vitamin B12 shots for weight loss report the happy dual effect of a better mood and the ability to focus for more extended periods of time
Tests like vitamin B12 levels and blood counts help guide the dosing
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