fiiding info on writing good sticky website content for products

Im looking for assistance in this area! I mean anyone can write!

it is what you write about that counts online though"

I work in the health field basically," so im selling health products, in general this is my niche market any help at all is fine I just want to get it right " good content writing scripts etc...I haven't fond any so far even a really hot tutorial would be nice? anyone have clues"??