Which is better for acne and blackheads?

The La Roche-Posay Effaclar Serum. Its salicylic acid clears pores and its glycolic acid exfoliates, both aimed at blemishes. The Olay is built for aging, not active breakouts.

Which is better for wrinkles?

The Olay Regenerist Retinol 24 Night Serum. Retinol is the better-studied ingredient for fine lines and texture. The Effaclar targets pores and marks, not wrinkles.

Not on the same night at first. Both exfoliate or turn over skin, so alternating nights reduces irritation. Ask a dermatologist if your skin is sensitive.

The Effaclar is 1.014 fl oz and used nightly, so it lasts roughly two to three months. No size was given for the Olay, so its run time can't be compared.

Is the Effaclar worth the extra?

At $34.98 at Shop Simon as of November 8, 2026, it is a fair price for a triple-acid serum. It has sold for $19.00 before, so watch the price history.

The Olay is fragrance-free and uses one main active, retinol. The Effaclar combines two acids, so it is more likely to sting or dry skin.

La Roche-Posay Effaclar Serum vs Olay Regenerist Retinol 24 Night Serum

Buy the La Roche-Posay Effaclar Serum if your main problem is acne, blackheads and clogged pores. Buy the Olay Regenerist Retinol 24 Night Serum if your main problem is fine lines, wrinkles and overall skin texture. The Effaclar is $34.98 at Shop Simon as of November 8, 2026, and has sold for as little as $19.00 on November 2, 2026. No price was given for the Olay, so compare it at your store before deciding.

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