If you’re asking what that claim means: be cautious with it. There isn’t one safe ingredient you can simply add to any face cream that will make blemishes disappear.
For acne and dark marks, evidence-based topical ingredients include:
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Benzoyl peroxide — helps treat acne-causing bacteria and inflammation.
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Salicylic acid — helps unclog pores.
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Adapalene — a retinoid that helps prevent clogged pores and new acne.
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Azelaic acid — can help both acne and post-acne dark spots.
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Sunscreen (SPF 30+) — particularly important because sunlight can make dark marks more persistent.
Avoid adding things like lemon juice, baking soda, toothpaste, or undiluted essential oils to facial creams; they can irritate or burn the skin and potentially worsen pigmentation.
