Ingredient comparison
GHK-Cu vs Vitamin B3: which one is right for your skin?
Short answer: Both earn their place. GHK-Cu is the kinder pick if your skin reacts easily, otherwise it comes down to preference.
| Compared | GHK-Cu | Vitamin B3 |
|---|---|---|
| Potency | Lower | Higher |
| Evidence | moderate evidence | strong evidence |
| Irritation risk | Low | Moderate |
| Clogs pores | Low | Low |
| In pregnancy | Considered safe | Considered safe |
| On a label | usually effective at 0.01-0.1% | works best above 2% |
So which should you pick?
Choose GHK-Cu if
- your skin is sensitive or reacts easily
Choose Vitamin B3 if
- you are dealing with breakouts and congestion
- dark spots, dullness or an uneven tone are what you want to work on
- you want the pick with the most research behind it
The honest bottom line: Both earn their place. GHK-Cu is the kinder pick if your skin reacts easily, otherwise it comes down to preference.
Better for your concern
- Dark spots and uneven toneVitamin B3
- Breakouts and congestionVitamin B3
- Dryness and dehydrationVitamin B3
- Sensitive, reactive skinGHK-Cu
Based on their scores in the knowledge base. "Either" means both hold their own for that goal.
GHK-Cu vs Vitamin B3, answered
Which is stronger, GHK-Cu or Vitamin B3?
Vitamin B3 is the more potent of the two, with the higher efficacy score. GHK-Cu is the lighter option.
Is GHK-Cu or Vitamin B3 better for sensitive skin?
GHK-Cu is the gentler choice for sensitive, reactive skin (low irritation risk, versus moderate for Vitamin B3).
Can you use GHK-Cu 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 GHK-Cu and Vitamin B3.