Ingredient comparison
Cysteamine vs Vitamin B3: which one is right for your skin?
Short answer: Honestly, either one works. Choose by your skin type and what your routine already has. If you are pregnant, Vitamin B3 is the safer one to reach for.
| Compared | Cysteamine | Vitamin B3 |
|---|---|---|
| Potency | Similar | Similar |
| Evidence | strong evidence | strong evidence |
| Irritation risk | Moderate | Moderate |
| Clogs pores | Low | Low |
| In pregnancy | Not in pregnancy | Considered safe |
| On a label | usually effective at 5% | works best above 2% |
So which should you pick?
Choose Cysteamine if
- dark spots, dullness or an uneven tone are what you want to work on
Choose Vitamin B3 if
- your barrier feels stressed and needs the support
- you are dealing with breakouts and congestion
- you are pregnant or breastfeeding, since only Vitamin B3 is considered safe
The honest bottom line: Honestly, either one works. Choose by your skin type and what your routine already has. If you are pregnant, Vitamin B3 is the safer one to reach for.
Pregnancy: Only Vitamin B3 is considered safe to use in pregnancy.
Better for your concern
- Dark spots and uneven toneCysteamine
- Fine lines and firmnessVitamin B3
- Breakouts and congestionVitamin B3
- Dryness and dehydrationVitamin B3
Based on their scores in the knowledge base. "Either" means both hold their own for that goal.
Cysteamine vs Vitamin B3, answered
Which is stronger, Cysteamine or Vitamin B3?
They are close in strength: Cysteamine and Vitamin B3 score similarly on efficacy. Choose by skin type rather than power.
Is Cysteamine or Vitamin B3 better for sensitive skin?
Both carry a similar irritation risk (moderate). Patch test either one before using it daily.
Can you use Cysteamine and Vitamin B3 together?
They have a known interaction. See our can-you-mix page for the verdict and how to use them.
General guidance, not medical advice. Read the full pages on Cysteamine and Vitamin B3.