Once you open the Alfredo Sauce the Alfredo Sauce will last for up to 5 days in the fridge.
After 5 days in the fridge the Alfredo Sauce can grow bacteria and should be thrown out.
If you want to keep the Alfredo Sauce longer than 5 days you should put the Alfredo Sauce in a freezer safe container and freeze it.
When frozen the Alfredo Sauce will last for up to 5 months.
However it's best to use the frozen Alfredo Sauce within a month of freezing it.
The longer you keep the Alfredo Sauce the less fresh it becomes and it starts to lose some of it's quality and taste.
Homemade Alfredo Sauce should always be kept refrigerated and when you open store bought Alfredo Sauce it should be refrigerated and consumed within 5 days or frozen if you want to keep it longer than that.