After years of taking choline bitartrate 500mg, I switched to Cognizin CDP-choline 250mg for two months. Both compare roughly equally as far as noticeable improvement in practical problem-solving. Neither helps much with memory (full disclosure: I'm in my seventies). The Cognizin CDP-choline tablets are much smaller and easier to swallow than the gigantic Nature's Way choline bitartrate tablets. That's a big plus. However, I will switch back to choline in the bitartrate form, because of the extremely vivid dreams I get with Cognizin (on waking, it takes a while to distinguish dreamland from reality, and my dreams are never pleasant). I tried reducing intake of Cognizin tabs to one every-other-day, and then one every-three-days, all to no avail. So, I'm out. But if you have sweet dreams, you're all set. Read more

And it's life extending claims cannot be overstated. I did NOT get sick or die on ANY of the days when I started using this supplement. Follow instructions exactly. For oral use only. Do not consume entire contents immediately in an attempt to achieve immortality. Read more

very helpful Read more

I started buying this product about 2 years ago and I think that it has helped my recall of things. It is not a huge difference, but I believe that it is there. Read more

perfect! Read more