Comment: they sell hair/skin treatments as well

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In reply to comment: thanks for the info. (see in situ)

they sell hair/skin treatments as well

It isn't just vitamins...

quick search on lice: http://www.swansonvitamins.com/q?kw=lice
dandruff: http://www.swansonvitamins.com/q?kw=dandruff
psoriasis: http://www.swansonvitamins.com/q?kw=psoriasis

There is a market for the types of things you are offering but there is competition. ALways good to look at the competition.