I've been taking this product for about a year and half, it is awesome. Go to the companies site and pay 76.00 instead of the horribly inflated price on Amazon. Great product, too expensive on Amazon.If you know anything about Carbon 60 products…this is the best of the best.Bob Greska's Carbon 60 is doing great for me. Just as an example, I've tried to restart my running program after a long lay off due to injuries and I'm doing well. I didn't think I would be running again. Ever. Recovery from the previous day is very surprising. Energy level is also greatly improved.An elderly family member is also taking it and it has made a big change too. You don't realize the distinct change until one day it occurs that you are doing more in your daily routine and how much your stamina has increased.I'm very pleased with the results and plan continue to use Bob Greska's C-60.I have consumed 2 bottles of Bob's C60. I have also tried one other brand twice. I feel based on this experience that Bob's offers a bit more of a boost. I am currently trying this other brand and will see how long it lasts. There is also a third brand I may try. My favorite way to evaluate is my energy while working out at the club. I find taking Bob's c60 an hour prior to working out gives me a boost of energy and I can push more weight.Update to previous review as i finished the bottle. Can't say I really felt any increase in energy while not expecting to. Used it primarily for its antioxidant properties. Will experience with at least another brand to compare of good quality. Found Vaughter Wellness site which has Carbon 60 also and will give them a try as well. Wish Amazon would carry their product as well. Probably will buy Greska's product again too, but really need to research and evaluate as to make an informed decision.I've only used two different brands of C60 so I can only compare one to the other. The most obvious difference was in dreaming. The other brand stimulated vivid dreams where I was able to think and reason while they were happening. This seemed quite extraordinary. I easily recalled one or two dreams each morning. With Greska's, that phenomenon went away. That was the main difference between the products for me. Both products tracked as similar via sleep studies tracking data with an Oura ring. I could take Greska's at night and still sleep. Didn't try that with the other brand.In conclusion, I loved the vivid dreams so will move on to yet another brand to continue experimentation. (I am healthy so there were no dramatic differences to report for either brand.) Perhaps if a person suffers from nightmares, Greska's would be the better choice. It's not for me.Works well for me. Using it for about a week now. I had more energy right away, sleep better and I am losing weight.I have not gotten any results from this product. Do your research, cause in my opinion I don't think sunflower oil is good for C60.I did not reap the benefits found in the original Baati study. I found the videos on SES Research web site helpful.