Is CO2 Laser Safe for Darker Skin Tones? Here's What a New 2026 Study Found

If you have a medium-to-deep skin tone, you've probably heard some version of this warning before booking a laser treatment: it might leave you with dark, blotchy patches that are harder to treat than whatever you started with. That worry isn't paranoia. It's rooted in decades of real cases and older laser technology that wasn't well suited to melanin-rich skin. But a study published this past May in the Journal of Cosmetic Dermatology adds fresh, peer-reviewed data to a conversation that's mostly been shaped by anecdote. Here's what the researchers actually found, what it means, and just as importantly, what it still doesn't tell us.

Why Darker Skin and Lasers Have a Complicated History

Fractional CO2 lasers work by creating thousands of tiny, controlled micro-injuries in the skin, which prompts the body to rebuild collagen and produce smoother, more even-toned skin as it heals. The complication is that melanin, the pigment that gives skin its color, can also absorb some of that laser energy, particularly with older or poorly calibrated devices. When that happens, skin can overreact during healing and overproduce pigment of its own, a condition called post-inflammatory hyperpigmentation, or PIH. Because melanin-rich skin has more pigment to begin with, PIH risk has long been assumed to climb with skin tone, and for years the cautious default was to treat Fitzpatrick IV and above very conservatively, or refer those patients elsewhere entirely.

What the New Research Found

Researchers Ayooluwatomiwa Oloruntoba and Michelle Rodrigues published a retrospective cohort study in May 2026 that tracked 38 patients with Fitzpatrick skin types I through IV who underwent fractional CO2 laser resurfacing on a modern platform (SmartXide Punto, HighPulse mode) at a single dermatology clinic. Here's what they reported:

• 38 patients total, spanning Fitzpatrick I (8 patients), II (12), III (12), and IV (6)

• Average pain score was 4.8 out of 10, with no significant difference across skin types

• 50% of patients had mild, transient redness that resolved within 72 hours

• 24% had transient swelling that resolved within 48 hours

• Zero cases of blistering, post-inflammatory hyperpigmentation, or scarring were documented, across every skin type studied

The Honest Caveats

This is a genuinely encouraging result, and it's worth taking seriously. It's also worth reading carefully. The study was retrospective, meaning researchers reviewed existing clinical records rather than running a controlled trial with standardized photography or blinded evaluators, and the sample of 38 patients is too small to reliably catch rare complications. The biggest gap: Fitzpatrick V and VI, the deepest skin tones and the group historically considered highest-risk for laser pigment complications, weren't represented in this study at all. So while the data is a real, positive signal for skin types I through IV, it doesn't answer the question for the patients who've historically had the most reason to ask it. The study's own authors flagged this limitation directly.

What Actually Lowers Your Risk, Whatever Your Skin Tone

Skin tone alone was never the whole story. The research and clinical consensus both point to a few factors that matter more than pigment classification by itself:

• The specific laser, energy settings, and pulse mode used, since not all CO2 devices or protocols are calibrated the same way

• The provider's experience treating a range of skin tones, not just their experience with the device in general

• Pre-treatment prep, including strict sun avoidance and, when appropriate, priming the skin beforehand

• Post-treatment compliance, especially diligent sunscreen use and avoiding sun exposure during healing

• An honest consultation where candidacy is assessed for your specific skin, not a one-size-fits-all protocol

Common Questions

Does this study mean CO2 laser is proven safe for all skin tones? Not quite. It's a strong, encouraging signal for Fitzpatrick I through IV specifically. Fitzpatrick V and VI weren't included in this particular study, so the data doesn't yet extend that far, and a good provider should be upfront about that gap rather than overselling the findings.

What is post-inflammatory hyperpigmentation, exactly? It's dark or discolored patches that can appear on skin as it heals from an injury or irritation, including from a laser treatment. It's usually temporary but can take months to fade, which is why minimizing the risk upfront matters more than treating it after the fact.

How can I lower my own risk before a laser treatment? Choose a provider who evaluates your skin type individually, ask what settings and protocol they use for patients with your skin tone, and follow their sun protection guidance before and after treatment exactly as instructed.

Does Cor.e Laser Studio treat clients with darker skin tones? Candidacy for CO2 laser resurfacing depends on your individual skin, history, and goals, which is exactly what a free consultation is for. We'll look at your skin directly and give you an honest answer about whether CO2 laser or IPL is the right fit, rather than guessing from a general skin-tone category.

Cor.e Laser Studio offers CO2 laser resurfacing and IPL, and nothing else, so any recommendation you get from us is about those two treatments and your actual skin, not an upsell. If texture, tone, sun damage, or scarring is what's bothering you, book a free consultation and we'll walk through what's realistic for your skin honestly, including whether it's the right fit for your specific skin tone.