Ron: <<There has been some recent discussions on NADH and some distributor that sells it as a colloidal suspension. I have a relative who is PhD in BioChem specializing in drug delivery mechanisms. I asked him about colloidal suspensions and NADH. >> Ron's relatives response then followed. I wanted to comment on the response. Thank you for the information on absorbing through the digestive system. It shows how many things can go wrong when something is taken orally. I guess I did not mention that our colloidal NADH is taken sublingually (under the tongue) and therefore bypassess the problems with oral preparations. Had you seen our web site?: http://ourworld.compuserve.com/homepages/chronicwellness Please let me know if I can be of any assisstance. Best Regards, Jeff LaBar ([log in to unmask]) Chronic Wellness PS. My friend's 90 year old mother is doing better and better with the colloidal NADH!