What is "diet aids" in the following dialogue?
A: It sounds like an interesting business to own, Risa.
B: It is. Plus, it runs itself, really.I just have to make sure I have supplies of all the popular products.
A: How do people find out about it? Do you do a lot of advertising?
B: No, I don't. The store is in a very good location near the subway, so people can drop in on their way home
and pick up what they need.
A: And what are the best-selling products?
B: Mainly vitamins and diet aids, but we've been so busy that we're planning to add a mumber of new items
to our supply.