Currently, the CDC is advising that any romaine is disposed of or avoided, regardless of when or where it was harvested. Many of you seemed prepared to do so—Cooking Light readers shared their frustrations in the comments section of a Facebook post yesterday, with many expressing that they had already consumed romaine recently.

With federal investigators unable to pinpoint an exact source of the outbreak yet, the risk of E. coli poisoning—and the chance of developing HUS, a rare form of kidney failure associated with a toxin in this viral E. coli strain—is particularly troublesome to many shoppers.

Some retailers have previously gone to great lengths to remove tainted romaine lettuce from their shelves, but romaine lettuce is a ubiquitous ingredient and can be found in many ready-to-eat products. In the coming weeks, as investigators work to discover what is causing illnesses in what’s sure to be more than just 11 states, taking the time to thoroughly check your meals for romaine could help you stay safe.

If you’re dining out, be sure to ask your server about any use of romaine in the food’s preparation (even if it’s not evident) and if the establishment has updated their menus. Pour over any ingredient list on pre-made or frozen food products to ensure that romaine isn’t a concern. And when you’re in the supermarket, check these eight products for romaine lettuce to be sure that all are safe for consumption:

1) Salad Bars

Whole Foods

You may be anxious to visit a salad bar, and for good reason—E. coli bacteria can transfer on contact, so take good care when eating from any salad bar in the coming days. On the off chance that your supermarket has yet to dispose of romaine, do not buy ingredients in proximity to romaine, and remember that self-serve utensils can easily become cross contaminated. This is a good time to make romaine-free salads at home.

2) Bagged Salad Mixes

The CDC was careful to include this in their bulletin: bagged mixes like Fresh Express’ “American” blend contains chopped romaine, which could be contaminated with E. coli.

3) Ready-to-Eat Salads

Many supermarkets, as well as fast-casual chains and other food retailers, sell pre-made salads that have been massed produced in the last month. Double check the ingredient list before enjoying pre-made salads, even if you can’t see romaine in the container upon first glance.

4) Ready-to-Eat Sandwiches and Wraps

Lettuce is in nearly all pre-made sandwiches, and so it goes without saying to check these before buying. Lettuce wraps, as well as tortilla-based wraps, are of concern.

5) Grain Bowls and Noodle Bowls

Retailers like Whole Foods and Trader Joe’s offer a full selection of ready-to-eat entreés in their deli selections, including noodle bowls and grain bowls that contain lettuce.

6) Green Juice and Blended Beverages

You should take time to inspect all smoothies and blended beverages for romaine—while V8 juice contains an ambiguous “lettuce” callout on the ingredient list, some ready-to-drink beverages—especially green juices—contain romaine alongside servings of kale and spinach. This might also be a good time to make blended green juice at home, where you can swap romaine for other hearty greens.

7) Soup

This is rarer than other items on this list, but blended, chilled soups, including items like packaged gazpacho, could contain romaine lettuce.

8) Refrigerated and Frozen Prepared Entreés and Appetizers

Romaine may not be the first ingredient that comes to mind in the frozen section, but it could be of concern in prepared foods that are available for purchase in your supermarket. Take the time to double check the ingredient list, and when in doubt, ask an employee for help.