marissa glutathione Andreou Glutathione—often called the “master antioxidant”—is

Typical storage: Room temperature (15-25C / 59-77F) is usually fine Away from direct sunlight Away from heat sources (windowsills, radiators) Bathroom is often too humid and warm Refrigeration for unopened serums: Not required for most products Can extend shelf life by 3-6 months Beneficial for products without strong preservatives Good practice if you stock up Shelf life unopened: Room temperature: 12-24 months (check label) Refrigerated: 18-30 months Opened topical copper peptide serums Once opened, exposure to air and potential contamination change storage needs

If your vitamin B12 levels are too high on the serum vitamin B12 test, your doctor may recommend further testing

GHK-Cu repairs each one through a different molecular pathway

Glutathione supplementation is not recommended during pregnancy or breastfeeding