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Some patients notice improved energy or mental clarity within 2448 hours, whilst others experience no immediate change, particularly if deficiency is severe
If youre also dealing with low testosterone symptoms alongside B12 deficiency, this guide can help you identify what to watch for
The honest answer is that it depends, and it depends most on whether you are actually deficient
If your levels are in the intermediate range, your doctor may also test your levels of MMA and homocysteine
It is important to continue with the prescribed course of injections even if you do not feel immediate improvement
But not everyone reacts the same way
