Major food companies employ virtual armies of chefs, food scientists, and marketing gurus dedicated to developing, test-marketing, and (if all goes well) eventually rolling out new products. Both salty and sweet, and sometimes both at once, these items tend to tempt consumers into eating more sugar, salt, and/or fat that is good for them. (These are the stories behind America’s favorite cookie brands.)

Along the way, though, they also please us with their vivid flavors and attractive textures — and when they eventually disappear from the shelves, as many of them do, we end up missing them, even though we realize that they’re not exactly constituents of a healthy diet. (Here, though, are some healthy versions of old-school junk-food snacks you’d like to try.)

Why do such snack foods get discontinued? In most cases, it’s simply a matter of sales. They just don’t generate the revenue that projections called for, and so are phased out in favor of the tried-and-true, or of other new introductions that might end up doing better.

24/7 Tempo consulted numerous snack food fan pages, company histories, and rating sites to compile this list of chips, candies, and other such items that we wish we could eat again right now.

Click here to see 40 discontinued snack foods we really miss

Sometimes we get the chance. Scrapped products may be brought back in some cases, either in their original form or with slight variations (or new names). Sometimes the snacks are still made in other countries, too, such as Mexico, Canada, or Australia, and these may be available by mail order. Collectors also sell unopened packages of the original on eBay and other sites — and some aficionados turn to crowd-sourcing platforms like change.org and ipetitions.com to beg companies to gear up production of their favorites again.