When I start feeling myself getting sick, I take 1 a day for a week, and I feel MUCH better within a couple of days of starting it. Since my immune system isn't the strongest, this is a nice addition to my meds regime.

This has made my teeth look so much Healthier. And so much lighter and whiter and cleaner. I have to admit the taste is not pleasurable buy beauty doesn't ever come easy. It lightened my teeth almost 2 shades lighter and I'm still using it. It's worth the cost of buying . And I think it works better than the whitening strips. I have to say this is a exceptional great whitening product for your teeth ,I didn't care for the taste but that comes with even whitening in the dentist office,these are just as good as the dentist,I got this threw a discount to try and its a very great product for your teeth