Nerve problems, such as: numbness or tingling (like muscle weakness)
You should consult your doctor before starting any supplement, including liquid form of vitamin B12, during pregnancy
That is the evidence gap, stated plainly: the mechanism is well-motivated and the preclinical signal is consistent, but no human study has confirmed that any of it translates to people, at any dose, by any route
if you are busy or forgetful, injections may be easier to keep up
Registered General Nurse (1996) with extensive background of experience within GP Practice and Urgent Care settings
For comparison, a B12 tablet leaves you with only 1.2% of B12 in the tablet