[RummyChick]

So how much do you need to make a difference?

[RummyChick]

here are two possibilities
http://www.swansonvitamins.com/CSN184/ItemDetail?n=0

http://www.swansonvitamins.com/SWU209/ItemDetail?n=0

quite a bit of difference in price

[decimon]

So how much do you need to make a difference?

The article doesn't say. Doesn't look like they've yet done human studies.