In a crowded dietary supplements space, it can be hard for a company to stand out, says Tom Aarts, co-founder Nutrition Business Journal and co-chairman NBJ Summit. Here, the industry expert, who also is the founder and managing director of Nutrition Business Advisors LLC, talks about product differentiation, the need for sufficient capital and proof of concept. These three areas, he says, can make the difference between a company's success or failure, but are often overlooked.