Needless to say the blog should also make frequent references to Tim Ferris' book and relevant anecdotes and tips in it (and of course an Amazon affiliate link for those that haven't bought it yet). I'm slightly surprised there's no mention of "As recommended by Tim Ferris' / Four Hour Body" in big letters above the fold in your current home page design. You ought to be able to pick up links from health-related blogs/forums as well as search traffic from people specifically looking for "PAGG stack", and immediate context is invaluable to keep the bounce rate down.
Whilst we're at it, other generic marketing suggestions:
- draw more attention to the savings for 2 and 3 month supplies
- offer an auto-rebill option (assuming your drop shipper and supplier is happy with it). Chances are some of your target market are people that quite happily get their Acai Berry supplements sent to them on a regular basis.