I use the "Nullo" brand tabs which I order through our wholesaler (I'm a pharmacist). They are coated tablets, come in bottles of 60 and retail around $10. I took one twice daily. I really believe they helped me last October. I killed 2 whitetails and had countless deer under me all through the season. I stopped taking them after October & I thought I could tell a noticeable difference in the deer's behavior. They didn't seem as comfortable in the area; I believe it was the lack of chlorophyll. Not like they winded me or saw me, but you know how they are--vigilant always. They were more relaxed when I was taking the chlorophyll. I do think it's "traditional". The American Indians ate roots, shoots, nuts, berries, acorns, etc.; I'm sure they smelled more like the outdoors, don't you?