This video explains MTHFR symptoms and compares it to the symptoms of COMT. The main point of the video is to help you understand that symptoms or SNPs will only give you part of the picture of what is going on with your health.  Knowing how SNP's relate to symptoms and health issues can give you a lot of insight on how to improve your health.  The relationship between MTHFR and COMT is a good place to start understanding your health because on the surface they seem to cause similar symptoms but as you look different the symptoms are caused for opposite reason.  This video gives you a brief understanding of this.