How to use them
Use them in the same routine at night. Apply Hydroquinone first, then PDRN, moving from thinnest to thickest texture.
- 1CleanseGentle cleanser, pat dry
- 2Hydroquinone2% – 4% (prescription in India), wait about 1 minute
- 3PDRNvaries (often with PN/polynucleotides blends)
- 4Moisturiserseal everything in
What Hydroquinone does
The strongest topical depigmenting agent, used for melasma and stubborn dark spots. It blocks melanin production, but it must be used in short, supervised courses: long-term use can cause irritation and, rarely, ochronosis (blue-black darkening).
- Typical strength
- 2% – 4% (prescription in India)
- When
- PM
- Irritation
- Best for
- Normal, Oily And Combination skin
Everything that pairs with Hydroquinone →
What PDRN does
Polydeoxyribonucleotide, a salmon-DNA-derived ingredient best known from in-clinic "salmon DNA" injections and now sold in serums. Early clinical studies suggest it may support tissue repair and hydration, but topical (as opposed to injected) evidence is still limited, so treat claims of dramatic results with caution.
- Typical strength
- varies (often with PN/polynucleotides blends)
- When
- AM/PM
- Irritation
- Best for
- Normal, Dry, Sensitive And Combination skin
Everything that pairs with PDRN →
Frequently asked questions
Can I use Hydroquinone and PDRN together?
Yes, it is safe. There is no known chemical conflict between Hydroquinone and PDRN, and neither makes the other less effective.
Which goes first, Hydroquinone or PDRN?
Apply Hydroquinone first, then PDRN. The general rule is thinnest to thickest texture, and lowest pH first.
Should I use Hydroquinone in the morning or at night?
Hydroquinone: best at night. Use only under a dermatologist's guidance, typically nightly on the dark patches for up to 3 months, then take a break. Strict daily sunscreen is required or results reverse.
Should I use PDRN in the morning or at night?
PDRN: works morning or night. Use as a serum step, morning or night. It has no known irritancy, so it layers easily with most other actives. It is not a substitute for an in-clinic PDRN treatment, which uses injectable-grade material under medical supervision.
Is Hydroquinone with PDRN safe during pregnancy?
Hydroquinone is generally avoided during pregnancy and breastfeeding. Ask your doctor about safer alternatives such as azelaic acid or bakuchiol.