Shaklee vitamins are what I would consider to be high quality. The Shaklee company has put much money into research and development and are committed to bringing us a natural, environmentally responsible product. I love it that this B has no artificial anything or preservatives. I feel good about taking it and that it is completely safe. I don't enjoy taking a big tablet like this and don't like the taste, but it is worth it for the reliability it gives. I have found that the B complex gives me great, lasting energy and helps with mood balancing. Vitamin B helps your body metabolize food efficiently into energy and that is what I feel this product does for me. I believe it is also supposed to help with mental acuity and cardiovascular health but those are kinda hard to measure so I can't say for certain. I do believe Shaklee's claims though since they are a company with a long-standing, good reputation whose quality speaks volumes. The only drawback with Shaklee products is that they are a bit expensive and then you have shipping costs as well. Recommmended PERIOD.