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Ingredient comparison

4-n-Butylresorcinol vs Cysteamine: which one is right for your skin?

Same comparison whichever way you searched it: Cysteamine vs 4-n-Butylresorcinol.

Short answer: Honestly, either one works. Choose by your skin type and what your routine already has.

Written by Maya FaourHow we score →

Chemical structure of 4-n-Butylresorcinol (4-Butylresorcinol)4-n-ButylresorcinolSolid and proven
Chemical structure of Cysteamine (Cysteamine)CysteamineWorth paying for
8
Efficacy
9
0
Hydration
1
0
Barrier
1
8
Brightening
9
1
Acne
1
2
Anti-aging
4
4-n-Butylresorcinol versus Cysteamine, compared
Compared4-n-ButylresorcinolCysteamine
PotencySimilarSimilar
Evidencemoderate evidencestrong evidence
Time to see it work4–8 weeks8–12 weeks
Irritation riskModerateModerate
Clogs poresLowLow
In pregnancyAsk your doctorNot in pregnancy
On a labelusually effective at 0.1-1%usually effective at 5%

So which should you pick?

Choose 4-n-Butylresorcinol if

  • you are pregnant, since Cysteamine should be avoided and 4-n-Butylresorcinol is at least one to raise with your doctor

Choose Cysteamine if

  • you want the pick with the most research behind it

The honest bottom line: Honestly, either one works. Choose by your skin type and what your routine already has.

Pregnancy: Cysteamine should be avoided in pregnancy, and 4-n-Butylresorcinol is one to check with your doctor first.

Better for your concern

  • Dark spots and uneven toneEither

Based on their scores in the knowledge base. "Either" means both hold their own for that goal.

No known clash between these two. If you want both, you can layer them; introduce one at a time.

Check these two in the tool →Or decode a whole product label →

From our dataNeither has to be the answer: 58 other ingredients in our glossary share a family with these two.

Related comparisons

4-n-Butylresorcinol vs Cysteamine, answered

Which is stronger, 4-n-Butylresorcinol or Cysteamine?

They are close in strength: 4-n-Butylresorcinol and Cysteamine score similarly on efficacy. Choose by skin type rather than power.

Is 4-n-Butylresorcinol or Cysteamine better for sensitive skin?

Both carry a similar irritation risk (moderate). Patch test either one before using it daily.

Can you use 4-n-Butylresorcinol and Cysteamine together?

There is no known clash between them. You can layer them if you like, just introduce one at a time.

General guidance, not medical advice. Read the full pages on 4-n-Butylresorcinol and Cysteamine.