Can you use aloe gel after expiration date?

If you have bought the juice from a reputable supplier and it came in a sealed container and you have kept it in the fridge since you opened it and you have kept it sealed then it should last for up to three months.

If the aloe is from a plant in your kitchen and you are keeping it covered on a dish them probably it will only be good for a few days maybe a week.

If you buy aloe vera gel/juice from a supplier you know it will be processed correctly and not leave any of the outer skin mixed in with the valuable juice.

For more information about the differences and benefits between growing or buying aloe vera see http://counterpointwisdom.com/aloevera/aloe-vera-production/buying-growing-aloe-vera/