The web site looks clean and professional for the most part. A bunch of typos and font inconsistencies, mostly in the FAQ page. but this is the minor stuff - I think there are two other issues that you'll have to spend some time on:
1. BM is a typical acronym for Bowel Movement. When I hear "BMxcel", I'm thinking "accelerated bowel movement." In other words, a laxative product.. and not a pleasant one at that.
2. There's definitely a credibility issue. You can try selling at other venues - such as Amazon. Perhaps set up an affiliate program and get blogs and other sites to recommend / sell your products for a commission.
Another point is that there's not a lot of content on the site, so the only way you can currently get search engine traffic is with advertising, which I think is a waste of money. Anyway, write about your products and health supplaments, get some links into your site from other sites and increase your Google ranking..
My two cents.. Good luck.