Food that is out of date and up opened like salad dressing still safe to eat?

It's not recommended to eat salad dressing that is past its "best by" date, even if unopened.

Here's why:

* Spoilage: While unopened, salad dressing can still spoil over time. The oils can separate, the flavors can change, and the acidity can decrease, leading to a less desirable taste and potential for bacterial growth.

* Quality: Even if it doesn't taste bad, the quality of the ingredients can deteriorate, making the dressing less flavorful and potentially less nutritious.

* Safety: While the risk is lower with unopened salad dressing, it's still possible for bacteria to grow over time, even in a sealed container. This can lead to food poisoning.

Here's what you can do:

* Check the "best by" date: If it's past the date, it's best to discard it.

* Smell and inspect: If the salad dressing has an off smell, a strange color, or looks separated, throw it out.

* Err on the side of caution: If you're unsure, it's always better to be safe and discard the dressing.

Ultimately, it's your decision, but remember that your health is paramount. If you're unsure, it's best to consult a food safety expert or discard the salad dressing.