@cph13--thanks for the update on the possible Dual Alpha/Gamma--I suggested this quite a while ago, and did not get a positive response. I hope they are rethinking... I wish I had a more positive update to share--the last year has been rough for me, quite apart from ME--repeat cardiac surgery a year ago to replace a failed bioprosthetic aortic valve with another one--since I am now about to be 85, this one should see me out, as they say. I continue to use the Vielight 633 and 810, and have been using the Neuro Alpha on an irregular basis since it arrived in the summer, but just don't have clear evidence for its effect as yet--sorry! I think the 633/810 is having a continued mild effect on things like my veins and nasal response to allergens--now I know that spring allergy season has begun by noticing itchy eyes, not a stuffy nose. I will post more if and when I feel I have some clear effects to to report--at the moment I am in a 5 week crash after a few good months towards the end of last year--don't know why!