Score breakdown
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Our full review
The 85 EUR lactic acid serum that beauty editors swear by. Good Genes uses lactic acid (an AHA gentler than glycolic) combined with licorice root extract for brightening and purified arnica for anti-redness. The result is an overnight glow that's visible by morning - smoother texture, brighter tone, more even complexion. Sunday Riley positions this as 'the world's best lactic acid' and honestly, the formula backs it up: no fragrance, effective concentration, smart supporting ingredients. The problem? Lactic acid is lactic acid. The Ordinary Lactic Acid 10% + HA delivers the same active at 8 EUR. Good Genes adds the botanical complex, the elegant texture, and the Instagram-worthy packaging. Is that worth 10x the price? For most people, no. But the formula IS genuinely excellent.
How to use
Apply 1-2 pumps to clean face in the PM. Can be used nightly if tolerated, or 3x/week for beginners. Follow with moisturiser. SPF mandatory. Can be mixed with Sunday Riley Luna (retinol) for the 'Good Genes + Luna cocktail'. Do NOT use with other AHAs/BHAs on the same night.
Who is it for?
Best for: dull skin, uneven texture, mild hyperpigmentation, anti-aging. Suitable for most skin types including sensitive (lactic acid is gentler than glycolic). Less ideal for: budget-conscious (TO Lactic Acid is 90% of the results at 10% of the price).
What to expect
Next morning: visible glow (lactic acid works fast). Week 2-4: smoother texture, more even tone. Month 2+: reduced hyperpigmentation, improved skin quality. Lactic acid also hydrates (it's a humectant), so no dryness like glycolic.
Common mistakes
1. Not considering The Ordinary Lactic Acid 10% as a budget alternative. 2. Mixing with other acids same night. 3. Skipping SPF. 4. Using too much (1-2 pumps is enough).
FAQ
Good Genes vs The Ordinary Lactic Acid 10%?
How it compares
Different products. Good Genes B (80) is a nightly leave-on lactic acid serum. TO Peeling B (76) is a weekly 10-minute multi-acid treatment. Good Genes is gentler, daily use. TO Peeling is stronger, weekly use. Good Genes 85 EUR vs TO 8 EUR. For gentle daily resurfacing, Good Genes. For weekly deep peel, TO.