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Page A-039
Troubleshooting common serum issues
No visible change after two or three months: confirm that you are using the serum most days, pairing it with daily sunscreen, and giving it at least 8–12 weeks; if there is still no difference, you may need a different active ingredient or a dermatologist’s help with stronger options.
Page A-097
Troubleshooting common serum problems
No visible change after a few months: If you have used a serum regularly for two to three months along with good sun protection and see no shift at all in your main concern, it may not be the right ingredient or strength for you; at that point, it is worth asking a dermatologist what they would prioritise instead of endlessly trying new bottles.