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What is the best time to take glutathione
General skin brightening
Ans : Slightly, with long-term use
Trial doses were established with a characterised, assayed, sterile clinical product
Direct the water against the vial wall, not onto the powder
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
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