Hello,
I am really enthusiastic about Wikipedia, and I love the the thought that I am contributing to the quality of this fantastic globally collaborative project.
I edit Wikipedia sporadically. I modify articles that I notice are incorrect, or I make minor edits, and sometimes I add content. I work in the research department of a vitamin and mineral producer (www.dsmnutritionalproducts.com). Many of my edits are made because I often use Wikipedia as a starting point for nutrition research, and I have a lot of related scientific materials on hand. I intend to keep my additions objective, but even so, if you feel that I am somehow over-promoting use of my company's products, please drop me an email, or we can discuss it on the discussion pages for the article.
Julia