When it comes to protecting your skin, SPF isn’t the whole story. Understanding PA+++ can help you choose a sunscreen that protects your skin not just from sunburn but from long-term damage, pigmentation, and premature aging.
1. Where PA Comes From
The PA system was developed in Japan in 1986 and is now commonly used in Korean sunscreens. Its purpose is to measure UVA protection, which is not reflected in SPF.
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SPF (Sun Protection Factor) measures UVB protection, the rays responsible for sunburn.
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PA (Protection Grade of UVA) measures UVA protection, which penetrates deeper into the skin and causes wrinkles, pigmentation, and long-term damage.
The PA rating comes from the Persistent Pigment Darkening (PPD) test, which measures how long it takes for the skin to darken under UVA exposure with sunscreen versus without.
2. What PA+++ Means
The “plus signs” in the PA system indicate the level of UVA protection.
| PA Rating | UVA Protection Level | Meaning |
|---|---|---|
| PA+ | Low | Some UVA protection |
| PA++ | Moderate | Moderate UVA protection |
| PA+++ | High | Strong UVA protection; significantly reduces risk of premature aging and dark spots |
All of our medical grade sunscreens are PA+++, it provides high protection against UVA rays, making it ideal for everyday use to prevent aging and maintain healthy, glowing skin.
3. Why UVA Protection Matters
Even if you don’t burn easily, UVA rays are silently damaging your skin:
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Penetrate deeper than UVB rays
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Cause collagen breakdown → wrinkles and sagging
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Trigger pigmentation → dark spots and uneven skin tone
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Contribute to long-term skin damage and aging
PA+++ ensures that your sunscreen blocks a significant amount of these damaging rays, keeping your skin healthier for the long term.
4. How PA+++ Relates to SPF
Many people only look at SPF, but SPF and PA protect against different types of rays:
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SPF 30–50: Protects mainly against UVB rays (sunburn)
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PA+++: Protects against UVA rays (aging, pigmentation)
So a sunscreen labeled SPF 50 / PA+++ is a powerful combination: it shields you from both sunburn and long-term skin damage.
5. Benefits of Korean Sunscreens
Korean sunscreens, especially those with PA+++, are highly sought after because they:
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Feel lightweight and non-greasy, perfect for daily wear under makeup
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Absorb quickly without leaving a white cast
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Include skincare ingredients like niacinamide, peptides, and antioxidants, so your sunscreen also nourishes your skin
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Encourage consistent use, which is key for long-term protection
6. How to Apply Sunscreen for Maximum Protection
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Apply enough about a nickel-sized amount for your face
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Reapply every 2 hours if you’re outdoors or sweating
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Layer under makeup, most Korean sunscreens absorb quickly and won’t disturb your makeup
Key Takeaway
PA+++ is a high level of UVA protection that, when combined with SPF, gives your skin a powerful defense against sunburn, pigmentation, and premature aging. Choosing a sunscreen that is comfortable to wear, lightweight, and packed with skincare benefits, like Korean sunscreens, ensures you’ll actually use it consistently, and that’s the real secret to healthy, radiant skin.