the body need al the b vitamins! not just one of them ,not just two of them,not even all of them accept for just one.
this is the reason i am taking b complex with every singele annoying b vitamin(checked on the Components).
like i said, today found that biotin is not very high at this pill so i will go get also seperate biotin pill with high dosage.
longterm, i red that if you deficient in one of them you most likely deficient in all of them.
so maybe you do deficient on the other b vitamins accept for b12 and biotin(or maybe you ment that you already took all the b group in the supplement,and then you probably not deficient in non of them)