whats the difference between oral b12 and injectable b12?
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whats the difference between oral b12 and injectable b12?
Oral b-12 gets chewed up by your GI tract before it can be absorbed and utilized. Injectable b-12 doesn't go through your GI tract so its bioavailability is much higher.
will oral b12 have some effectiveness?
You would have to take a ridiculous number of pills each day for it to be effective.