How long can DHC lip balm be used after opening? Why is there no production date marked?

DHC is a skin care brand from Japan. So how long can DHC lip balm be used after it is opened? Why is there no production date marked on DHC lip balm?

How long can DHC lip balm be used after opening?

If the lipstick has been opened, try to use it up within 2 years, because it will start to oxidize and breed bacteria after it is opened, so it is best to use it up as soon as possible. Many girls use up DHC lip balm very quickly because it is so easy to use, and they feel that they will not last long. You can prepare two DHC lip balms. You can carry one with you for reapplication, and keep the other at home and apply thickly before going to bed as a lip mask.

Why is there no production date on DHC lip balm?

The reason why there is no production date marked on DHC lipstick is that according to Article 61 of the Japanese Pharmaceutical Affairs Law, only "products that will deteriorate within 3 years under normal storage conditions" must be marked with a shelf life. If there is no indication, it means that the product has a shelf life of at least 3 years if unopened. DHC lipstick can be stored for 3 years in an unopened state, so the production date cannot be seen on the outer packaging.

Once opened, DHC lip balm needs to be used up within 2 years and cannot be used for too long.