Is the packaging important?

Hi Dr. Irwin I have heard that products that are packaged in jars are not stable and that as soon as you open the jar the light diminishes the effect of the ingredients. Is this true?

This is true mostly for antioxidants which, on exposure to air (just like fruit), start to deteriorate slowly.   The best packaging for these is air-free.  But, if you open a dark glass bottle of vitamin C serum and use it over a period of a couple of months, it should be fine.   Dr. I

Dr. Brandith Irwin, MD

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