What are "anti d's"? The BHMT variations tested by Yasko are meaningless, so it's unlikely they are causing anything. Some relevant ones are at http://forums.phoenixrising.me/index.php?threads/interesting-bhmt-and-bhmt2-variations.24512/Another question if that is ok. I would say I have often struggled with low mood over the years. I take anti d's now and definitely feel so much better on them, even though I worry when I read they are not good for you. Are my VDR taq ++ and BH2 ++ and BH4 ++ probably responsible for my low mood?
A gene can have hundreds or thousands of SNPs. 23andMe usually test for somewhere between a few and dozens per gene, though sometimes they test none and sometimes they test hundreds per gene. Each SNP can have an impact independent of other SNPs on that gene.There is another issue I don't understand. I have COMT V158M +/- and COMT H62H +/- would I add the two together to say I am +/+ COMT overall?
I somehow thought that for each gene, such as MTHFR, COMT etc you could only have two in total of all the variations but I noticed in another thread that someone had COMT +/- with three different variations so I think I may have understood that wrongly? Many thanks
Sometimes +/+ means absolutely nothing at all, such as for the BHMT SNPs tested by Yasko. It's a symbol used by whoever is interpreting your results, indicating that they think it's a risk. To see if it is a risk, and what it's a risk of, it's necessary to read the research. +/- is usually completely meaningless, or just has a very tiny impact. Some missense mutations are an exception, such as MTHFR C677T.
In the case of COMT, research shows that V158M is only known to have an impact when homozygous (+/+), though it is a fairly substantial impact then. H62H also only has an impact when homozygous. So again, they're probably not having much of an impact, if any.