1.5ata to 2.4ata is the general protcol for HBOT for RSD/CRPS. I usually dive at 1.8ata. I also have a antioxidant rich diet and take antioxidant suppliments ie:vitamin e, grapeseed extract and pine bark. I juice daily and eat plenty of raw veggies. Oh, you can also have damage from too much antioxidants.....moderation is key here on the suppliments. Also, aging increases OFR, diet, medicines and environment. HBOT is a personally choice, just as pharmacueticals are. It is cost prohibited and I think THAT is the shame. Just my 2cents worth. Di