500mcg is at the bottom end of effective for those needing B12 and trying orally.
Don't look at that % of RDA... not all of the B12 is absorbed.
Most people see better results starting at 1000mcg daily of methylcobalamin form. (Cyano is slower to act and may not be converted to methyl in the body adequately).
So yes taking B12 separately is a good idea. You can still take your mixture in addition for the other ingredients.
If you are really low -- you can start at 5000mcg daily for up to 3 months then when you are at a higher level you can come down to 1000mcg daily.
Most of us use iherb.com and buy online methylcobalamin:
http://www.iherb.com/Search.aspx?kw=methylcobalamin
These are the choices there.
Remember to take the B12 on an empty stomach.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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