Fish Oil - data is still a bit soft depending on what benefit you are looking for - but for anti-inflammation effects. Robb Wolf recommends it as do many others. Vit D - another rec from other people. Seems to help my mood mostly. Plus Doc said I had low levels. Protein powder - workout recovery, might be bullshit. I don't take a multivitamin because of research showing decreased lifespans - those anti-oxidants are reducing your immune response which depends on free radicals. Here is a nice graphic of different supplements/benefits as tied to their evidence: http://www.informationisbeautiful.ne...l-supplements/ Cool, thanks for letting me know some of the reasoning. I'm still curious about a number of the ones in the original post I quoted. Also, thanks for the link, but some of the studies linked to in that site as strong evidence are pathetic. Unless you know how to analyze a study, please don't give any stock to that website.