One of the things about TJs that I love is their dedication to helping their customers. This is true in the store, and it is also true of their website. Trader Joe’s website has several lists that they have created to help their customers who are interested in a certain type of food. They have lists of gluten-free products, low sodium (140 mg or less per serving) products, fat free products, vegan/vegetarian items, quick meals, and kosher items. These lists can be found here.
They seem to do a good job of keeping their lists updated; the low sodium list was last updated October 10, 2009. TJs tells you that this isn’t everything in their store that falls into the category, but it is a good place to get started.