Expired Jello can make you sick if the expired Jello is actually bad.
However just because the Jello has expired does not mean the Jello is actually bad or spoiled.
Even old powdered Jello won't make you sick even if it's gone hard unless it has mold on it.
However bad prepared Jello could make you sick due to bacteria that could be in the spoiled Jello.
When prepared Jello has gone bad it will take on a watery consistency and should be thrown out when that happens.
For prepared gelatin the gelatin has gone bad if it has taken on a watery consistency, or simply started to lose texture.
If you are seeing signs of mold growth, toss the product out.
Slight changes in color and taste are signs the gelatin snack is starting to degrade in quality.
As for powdered Jello mix it will be bad if it has mold in it, has gone hard etc.
Jello can go bad.
Although Jello that remains in it's powder form can last for a long time and can last for 10 years or longer the Jello does eventually go bad.
The powdered Jello mix can become hard and may grow mold eventually if left in a moist environment.
Also when the Jello is made it will last for only about a week in the refrigerator.
Dry Jello mix should always be stored at room temperature, and kept away from light, heat and moisture.
Be sure the package stays tightly sealed, to avoid exposure to moisture.
Refrigerating dry mix will not extend the shelf life, and the high humidity could affect the quality of the powder, even causing spoilage.
When it comes to dry jello, it won't spoil in a way that it makes you sick.
And it's basically up to you if you're okay with eating slightly old and rubbery jello or you'd rather throw it out.
Of course, the moment you notice any discolorations, like bacteria marks or specks of mold on the surface, discard the jello.
Despite its long shelf life, jello can go bad, and when it does there are usually telltale signs to clue you in.
Noticeable changes in the color or texture or an obviously off odor point to spoiled jello.
Mold is also a dead giveaway that the Jello has gone bad and should be thrown out.