Ankesh,
I'm sure you'll do extremely well with marketing non-prescription supplements...
As with many other industries, some people are just Great at developing poor customer service along with terrible product selection that are sometimes on the level of border line scams...
But then, you have people like...
You probably know about Mike Adams....
http://www.healthranger.org/bio.html
Mike has developed some Excellent money making business models and resources...
Surprisingly, no blogs yet...
With a little Creative Thinking...
There are all kinds of business ideas and Unlimited money making possibilities throughout Mike's resources...
With a little reading the works almost done for you...
Including a Ton of keyword ideas to Help anyone that may be the least bit interested...
http://www.supplementreference.com/
http://www.healingfoodreference.com/
http://www.herbreference.com/
http://www.nutrientreference.com/
Phil