I've been using BodyBio phosphatidyl choline for the past 6 months. I was convinced to begin this version after reading info and watching a vid posted on the Mitochondrial 101 threads by radio. The falling Aus dollar and, seemingly, astronomical increase in postage, now put this product out of my reach. I've also read some references to citicholine. And Martin Pall seems to favor phos serine. His list says, Other phosphatidyl polyunsaturated lipids—this and the phosphatidyl choline are predicted to help restore the oxidatively damaged mitochondrial inner membrane I don't know whether these things are interchangeable . Do you have a favorite brand/form of choline? Thanks for your help.