— The Xiuren Team Q: How often should I use a serum? A: Most serums (including our Radiant Youth Serum) are safe for twice‑daily use —morning and night—unless you have highly sensitive skin, in which case start with once daily.
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A: Absolutely not. Even oily skin needs hydration. Look for a lightweight, oil‑free moisturizer like our Aqua‑Veil Gel‑Cream . xiuren.biz
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