Based on the reviews, the **RED SMOOTHIE SERUM 30** by **ARENCIA** has mixed suitability for oily dehydrated skin prone to stains, especially in summer. **Pros:** - Several users with oily skin types reported positive experiences, noting that the serum absorbs well and doesn't feel overly heavy or sticky. - Some reviews mention that the serum can be layered thinly to avoid excessive stickiness, making it suitable for daytime use. - The cooling effect and quick absorption were highlighted as beneficial for summer use. **Cons:** - A few users mentioned that the serum felt too rich or sticky, which could be problematic for oily skin, especially in warmer weather. - Some reviewers suggested that the serum might be better suited for nighttime use due to its thicker texture. **Recommendations:** - **Test a small amount** first to see how your skin reacts. - **Layer it thinly** to avoid stickiness. - **Consider using it in the evening** if you find it too rich for daytime.

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