I’ve heard that on the p450 gene they only give two SNPs and 8 are done by several other companies because p450 can be influenced by various SNPs … which are more than the two. At the EDNF conference some asked about this sort if testing and the geneticist said there was a study where three companies were compared on the eval of the same case. In one are or the testing, two companies agreed and the third was wrong. The third was 23 & Me.
This is one of the things that bothers me about these companies. I think they are all competing for customers and it is easy to rope in subjects by promising ancestry, etc. I also have an issue with the lack if genetic adequate counseling. No one can do that correctly for $99.