Hydroquinone
Also known as: Hydroquinone, 1,4-Benzenediol, para-Dihydroxybenzene
Potent tyrosinase inhibitor that reduces melanin production to fade dark spots and hyperpigmentation.
See this ingredient in your own products — scan the label.
Get the appWhat it does
Hydroquinone works by inhibiting the enzyme tyrosinase, which is essential for melanin synthesis, thereby slowing melanin production and gradually lightening hyperpigmented areas. It's most effective for melasma, post-inflammatory hyperpigmentation, and age spots. Results typically appear after 4-12 weeks of consistent use.
Benefits
- Clinically proven to fade stubborn hyperpigmentation and dark spots
- Effective for melasma and post-inflammatory hyperpigmentation
- Works synergistically with retinoids and sunscreen for better results
- Generally well-tolerated when used at appropriate concentrations
- Faster-acting than many natural brightening alternatives
Who it suits
- Hyperpigmentation and melasma
- Post-inflammatory hyperpigmentation
- Deeper skin tones with uneven pigmentation
- Those seeking potent brightening results
How to use
Start with 2% concentration, applying a pea-sized amount to clean, dry skin once or twice daily. Use consistently for 8-12 weeks to assess results, and always pair with broad-spectrum SPF 30+.
Pairs well with
Retinoids (tretinoin, retinol), Broad-spectrum sunscreen SPF 30+, Glycolic acid or other gentle exfoliants, Vitamin C serums
Be careful pairing with
Other potent depigmenting agents in same formula, Benzoyl peroxide in high concentrations
Safety & cautions
Hydroquinone is prescription-strength in many countries (4%) or available over-the-counter at lower concentrations (2%). Long-term use (>3-4 months) should be monitored by a dermatologist; rare ochronosis (blue-black discoloration) can occur with prolonged misuse. Sun protection is essential as it can increase photosensitivity.
Educational information, not medical advice. Concentration and formulation change how an ingredient behaves.