Old blemish marks can be surprisingly stubborn. Just when my skin starts looking clearer, a few lingering spots seem to catch the light and remind me they’re still there.

Rather than layering on every brightening product I find, I’d rather focus on formulas with ingredients suited to uneven tone.

1. Eucerin UltraWHITE+ Spotless Double Booster Serum

For a routine focused on stubborn-looking spots. When dark marks are my main concern, I look for a product specifically designed to address uneven pigmentation. Eucerin UltraWHITE+ Spotless Double Booster Serum caught my attention because it is positioned around spot-focused brightening care. I’d check the current packaging and ingredient list to understand the active ingredients in the version available to me, since product formulas can vary by market.

2. IT Cosmetics Bye Bye Pores 10% Glycolic Acid Serum

Glycolic acid takes a different approach. As an alpha hydroxy acid (AHA), it exfoliates the skin’s surface, helping improve the appearance of dullness and uneven texture over time. IT Cosmetics Bye Bye Pores 10% Glycolic Acid Serum is worth considering when rough-looking skin and a lack of radiance are also concerns. With a 10% glycolic acid formula, I’d start cautiously, especially if my skin is sensitive or I already use retinol, exfoliating toners, or other acids.

I’d choose Eucerin for a routine centered on dark spots and IT Cosmetics when dullness and surface texture also need attention. They aren’t interchangeable, and neither would be my cue to start using multiple brightening treatments at once. I’d introduce one product at a time, stay consistent with sunscreen, and give my skin several weeks to respond. A gradual approach is much more worthwhile than chasing overnight results.