Globuzzskin / Glossary / Acids
Ingredient Glossary

Acids, explained

Acids exfoliate, brighten and unclog pores by dissolving the bonds that hold dead skin cells together. They range from gentle daily-use options to powerful weekly treatments. The golden rule: start slowly, one or two nights a week, and always wear SPF the morning after.

Glycolic Acidactive

Exfoliates, resurfaces and brightens.

The gold standard AHA. Derived from sugar cane — small molecule that penetrates deeply to exfoliate, resurface and brighten. Proven to increase collagen production with consistent use.

NormalComboOilyDullnessTextureDark spots
Use with care: Avoid on sensitive or rosacea-prone skin. Always use SPF. Start 1–2 nights per week.

Lactic Acidgentle

Gently exfoliates while hydrating.

Larger molecule than glycolic — gentler, more surface-level exfoliation. Hydrates as it exfoliates. Ideal introduction to acids. Works well for dry or reactive skin that can't tolerate glycolic.

DrySensitiveNormalDullnessDehydrationTexture
Use with care: Still requires SPF. Avoid with active rosacea flares.

Salicylic Acid (BHA)active

Clears pores and calms breakouts from within.

Oil-soluble — the only acid that penetrates inside the pore to dissolve congestion from within. Anti-inflammatory, making it effective for active breakouts as well as prevention. The acne staple.

OilyComboAcne-proneAcneCongestionBlackheads
Use with care: Can be drying — follow with moisturiser. Avoid in pregnancy.

Azelaic Acidgentle

Fades pigmentation and calms redness at once.

Anti-inflammatory, antibacterial and brightening all at once. Fades post-acne marks, calms redness and reduces pigmentation without irritating sensitive skin. Safe in pregnancy. The underrated all-rounder.

SensitiveComboOilyRednessAcneDark spots
Use with care: Pregnancy safe. Can cause temporary tingling on first application.

Mandelic Acidgentle

The gentlest acid — perfect for beginners.

Largest AHA molecule — very slow, very gentle penetration. Antibacterial properties. Ideal for first-time acid users, darker skin tones, or anyone with sensitivity to glycolic.

SensitiveDryAll skin tonesDullnessAcneUneven tone
Use with care: Gentlest AHA option — ideal starting point for beginners.

Tranexamic Acidgentle

Blocks excess pigment at its source.

Not technically an exfoliating acid — blocks the signal that triggers excess melanin production. Clinically proven to fade hyperpigmentation and melasma. Safe for all skin tones and sensitive skin.

All typesSensitiveDarker skin tonesDark spotsMelasmaUneven tone
Use with care: No photosensitivity. Can be used morning and evening.

Not sure which of these your skin actually needs?

Take Julie's free 2-minute skin quiz →