A lot of people seem to follow the old theories about ROS being 'bad for us' and antioxidants 'being good for us'. Apparently, it's not quite that simple, especially for mitochondria. In mitochondria, superoxide is a signalling molecule essential for proper function; electron leakage is part of the feedback mechanism. In response to increased demand for ATP, more superoxide is produced, which interacts with certain proteins in a way that increases mitochondrial capacity and number of mitochondria per cell. Increasing antioxidant levels can actually reduce ATP production, by preventing this adaptive function. If levels of superoxide increase enough (due to damage or whatever), it triggers cell death, which will hopefully result in replacement by a fresh healthy cell; antioxidants might keep defective cells around longer.
Early proponents for antioxidant supplementation claimed that this would reduce cellular damage and thus increase lifespan. Multiple trials showed that this was incorrect, and that taking high-dose antioxidants actually increased the risk of earlier death. Furthermore, pro-oxidants can increase lifespan.
There's also the problem that the level of antioxidants in the body are carefully regulated; taking high dosages may only increase cellular levels slightly, with the rest flushed down the toilet.
These challenges to the old theories about ROS and antioxidants are something I found in "The Vital Question", by Nick Lane. Fascinating theories for how life initially started, and how it developed how it did. Mitochondria play a critical role in life more advanced than bacteria, so several chapters are about them. I haven't verified all the references and study results. I just thought it was worthwhile pointing out that the question of antioxidant supplements is not simple. If you're taking high-dosage antioxidants based on outdated theories (which are still being pushed by manufacturers and marketers), you might want to do a bit more research into more recent findings. I highly recommend "The Vital Question", but I'm sure there are other resources out there. A quick googling showed plenty of papers about the controversy, with the common conclusion being "We don't know how much is good for you." I think the safe assumption is that moderate levels in diet are probably good for you, and moderate supplementation might be a good idea if for some reason you can't get moderate amounts of fruits and veggies in you diet. For ME, I think you have to experiment to see whether supplementation provides any noticeable benefits for you as an individual. Just don't assume that "more is better".
Early proponents for antioxidant supplementation claimed that this would reduce cellular damage and thus increase lifespan. Multiple trials showed that this was incorrect, and that taking high-dose antioxidants actually increased the risk of earlier death. Furthermore, pro-oxidants can increase lifespan.
There's also the problem that the level of antioxidants in the body are carefully regulated; taking high dosages may only increase cellular levels slightly, with the rest flushed down the toilet.
These challenges to the old theories about ROS and antioxidants are something I found in "The Vital Question", by Nick Lane. Fascinating theories for how life initially started, and how it developed how it did. Mitochondria play a critical role in life more advanced than bacteria, so several chapters are about them. I haven't verified all the references and study results. I just thought it was worthwhile pointing out that the question of antioxidant supplements is not simple. If you're taking high-dosage antioxidants based on outdated theories (which are still being pushed by manufacturers and marketers), you might want to do a bit more research into more recent findings. I highly recommend "The Vital Question", but I'm sure there are other resources out there. A quick googling showed plenty of papers about the controversy, with the common conclusion being "We don't know how much is good for you." I think the safe assumption is that moderate levels in diet are probably good for you, and moderate supplementation might be a good idea if for some reason you can't get moderate amounts of fruits and veggies in you diet. For ME, I think you have to experiment to see whether supplementation provides any noticeable benefits for you as an individual. Just don't assume that "more is better".