Hello Grizz, was wondering on your supplements if you tried taking them different times or splitting up dosesge? The l arginine and citriline? My husband has been having issues with ED for several years now. He is on blood pressure Meds. I try to do as much research as I can on natural ways of healing. It seems like no matter what I give him as far as blood pressure and blood Sugar it doesn't help allot. The lower mg of v1agra doesn't work for him. And I'm scared to let him take 100 mg. just not sure how safe it is. He has been taking l arginine for a few weeks. He started out low dose. He is up to 1000 mg in morning ang 1000 mg at night. Wanted to make sure it didn't upset his stomach. I plan on adding the citriline . When you mentioned it I did some reading on it. Thanks for the information.