Sunday Riley Good Genes Lactic Acid Treatment Review: Premium AHA, Tested

The premium AHA proposition

Sunday Riley Good Genes is the brand's flagship serum — a 7% lactic acid treatment with licorice root and prickly pear botanicals, positioned as a cult-favorite premium AHA. At $85 for 1 oz, it has to justify that against equivalent concentrations at substantially lower prices.

Formulation

• 7% lactic acid — AHA active (gentler penetration than glycolic; ideal for dry/sensitive users)
• Licorice root — evidence for pigmentation support (glabridin compound)
• Prickly pear — antioxidant support
• Lemongrass — aromatic (fragrance contribution)
• Cypress oil — anti-inflammatory (minor)

The formula is credible — 7% lactic at a well-buffered pH delivers real exfoliation.

What it does well

• Brightening — consistent tone evening over 4-6 weeks
• Texture smoothing — gentle lactic refines surface without glycolic's prickle
• Mild pigmentation support — licorice contributes slowly
• Tolerability — dry/sensitive users often report this is one of few acids they can use

Where the price breaks down

An equivalent-concentration alternative for comparison:

• The Ordinary Lactic Acid 10% ($8) — stronger lactic, fewer botanicals
• Sunday Riley Good Genes ($85) — 7% lactic + licorice + prickly pear + fragrance/luxury packaging

You're paying roughly 10× for: botanical additions (modest clinical value), luxury packaging, and brand. The active delivery is comparable.

Who should actually buy this

• Dry/sensitive skin users who can't tolerate The Ordinary's higher concentration
• Luxury-routine buyers where packaging and ritual matter
• Pigmentation-focused users willing to pay for the licorice addition
• Brand-loyal Sunday Riley customers with the full routine

Who should skip

• Anyone who tolerates stronger AHAs (stay with The Ordinary or Paula's Choice)
• Ingredient-per-dollar shoppers
• First-time AHA users (Paula's Choice BHA is a better starter)

Limits

• Fragrance — definitely present (lemongrass/cypress botanicals)
• Pricing — hard to justify on cost-per-active basis
• Nightly use caution — 7% lactic is enough to require pairing with SPF

The verdict

A high-quality lactic acid serum that works, priced for buyers who value brand and luxury ritual alongside active delivery. The formulation is real; the markup is real. Recommended conditionally.