I did look at Nature Made for its low B6 level. But the 1 Body brand not only has a relatively low level of B6, but also seemed to be the best overall b complex of what I saw (although the Nature Made beats it on price). With the 1 Body brand I found that:

-the B12 was listed as Methylcobalamin (natural), not Cyanocobalamin (synthetic)
-the source of riboflavin is listed as riboflavin-5'-phosphate which is its active form
-the source of B9 is 5MTHF rather than folic acid; 5MTHF is more completely metabolized according to sources I have read

Based purely on what I read I chose what seemed like the best overall b complex supplement of the ones I looked at.