Correct, the salt water does not expire. But you may have read on some of the anti-implant scare-sites that the bags of salt water (from which the implant contents are taken) are all marked with an expiration date, and should be kept cool. So you may wonder, if the salt water bags or bottles have an expiration date, why doesn't the salt water expire or go bad inside the warm body after a certain period of time?
The reason is that although salt water does not go bad or expire, the containers that the manufacturers distribute it in do expire. The materials from which the containers are made, and with which they are sealed, will deteriorate over a period of years sitting on a shelf somewhere, especially if the air is hot and dry. So the manufacturers always put an expiration date and a notice to keep cool, on every container. It is the packaging material, not the salt water, that can expire.
Not only that, but the water inside the implant is constantly being refreshed because of osmosis.
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