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UV Science Basics

The Fitzpatrick Skin Type Scale: Finding Your Type and Sun Sensitivity

Find your Fitzpatrick skin type and you can calibrate sun-protection habits to how your skin actually responds to UV.

By the numbers

The Fitzpatrick scale classifies skin into six types, from Type I (always burns, never tans) through Type VI (never burns), based on UV response and melanin. Lighter phototypes (I-II) have a lower minimal erythema dose and higher melanoma risk.

Clinical references describe the Fitzpatrick classification as a standard tool for estimating sun sensitivity, noting that lower phototypes burn at smaller UV doses and carry elevated melanoma risk, though all skin types can develop skin cancer.
What the evidence actually says — Fitzpatrick Classification of Skin Types I through VI

Questions we get a lot

What is the Fitzpatrick skin type scale?

It's a clinical classification that sorts skin into six types based on how it responds to UV and its melanin content, ranging from Type I (always burns, never tans) to Type VI (never burns). It is widely used to estimate sun sensitivity.

Does a higher Fitzpatrick type mean I don't need sunscreen?

No. While lighter types (I-II) burn more easily and have higher melanoma risk, all skin types can develop skin cancer and benefit from UV protection. The Fitzpatrick scale helps calibrate habits, not skip them.

What is the minimal erythema dose (MED)?

The minimal erythema dose is the smallest amount of UV that produces visible skin reddening. Lighter Fitzpatrick phototypes have a lower MED, meaning they burn with less UV exposure than darker types.

What people keep asking

r/SkincareAddiction: 'I always tan and rarely burn, so I figured I didn't need much sunscreen. Where do I fall on the Fitzpatrick scale and does that change anything?'

Sources & citations

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