hmmm...my understanding of B12 is that it needs to be taken under the tongue because it is basically 'killed' when digested through the stomach. When taken under the tongue it can be 'digested' through the blood stream. If that just made sense... I've taken B12 by Solar Ray and not had issues...but that could just be me.
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Re: Vitamin B12 supplement
I've taken B12 by Solar Ray and not had issues...but that could just be me. 
