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Common mistakes and easy fixes
Changing too many products at once → introduce one new serum at a time and track your skin for 2–3 weeks before adding anything else.
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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.