For US clients, StrateGene is the preferred nutrigenomic test when compared to all other DNA companies.
For international clients, the 23andme test gives you the raw data to screen for thousands of genes which include the MTHFR genes, although the genes they test for change on a regular basis. Their chip is not the same as StrateGene but still a good source of raw data.
We recommend that if you are an international client, i.e. not a USA client or living in New York, that you get your raw data from here (23andme) and upload it to the StrateGene report. StrateGene is one of the most researched gene reports on the market.