With no preservatives how VITAMEAL and PHARMAMEAL are conserved?

With no preservatives how VITAMEAL and PHARMAMEAL are conserve ?
It's by heating the baby food jars that the preservation is possible.
This technic allows you to kill all the germs that might be in the jars.
By heating the jars, the oxygen is expelled that bump the jar's cover, proving that the food jar has been well conserved.
To see
How long to keep VITAMEAL or PHARMAMEAL food jars in the refrigerator ?
Can i freeze VITAMEAL or PHARMAMEAL baby food jars?












