Beauty of Joseon Relief Sun vs. Round Lab Birch Juice
Two of the most popular Korean sunscreens on the market, compared on price per milliliter, formula, and who each one actually suits.
Quick verdict
Verified 9/27/2026Affiliate links: we may earn a commission at no extra cost to you.
- If your skin runs normal to oilyBeauty of Joseon Relief Sun: Rice + Niacinamide SPF50+ PA++++ (formerly Rice + Probiotics) ($0.38/mL, YesStyle checked 9/12/2026): Beauty of Joseon's lighter, more balancing formula is the safer starting point.
- If your skin runs dry or easily irritatedRound Lab Birch Juice Moisturizing Sunscreen SPF50+ PA++++ ($0.39/mL, YesStyle checked 9/27/2026): Round Lab's richer, more hydrating formula is the more likely fit.
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Criteria | Beauty of Joseon Relief Sun: Rice + Niacinamide SPF50+ PA++++ (formerly Rice + Probiotics) | Round Lab Birch Juice Moisturizing Sunscreen SPF50+ PA++++ |
|---|---|---|
| Price | $19.00 | $19.50 |
| Price / unit | $0.38/mL | $0.39/mL |
| Size | 50 mL | 50 mL |
| Price checked | 9/12/2026 | 9/27/2026 |
These two show up together in nearly every "best Korean sunscreen" conversation, and for good reason: both are chemical sunscreens with strong track records, similar SPF50+ PA++++ ratings, and near-identical pricing. That last part means price won't decide this one. The formula will.
Price per milliliter
Beauty of Joseon Relief Sun runs $0.38 per milliliter ($19.00 for 50mL). Round Lab Birch Juice runs $0.39 per milliliter ($19.50 for 50mL). That's a one-cent difference, close enough that it shouldn't factor into your decision at all. Whatever you choose, choose it for the formula, not the price.
The formulas are built for different skin types
Beauty of Joseon centers the formula on rice extract and probiotics, positioned as a lightweight, balancing option aimed at normal to combination skin. Round Lab centers Birch Juice (birch sap) and centella asiatica, positioned specifically for dry and sensitive skin, with a richer, more moisturizing finish.
That positioning lines up with how each is generally discussed by users: Beauty of Joseon comes up more often in "lightweight daily sunscreen" recommendations, while Round Lab comes up more often in "sunscreen for dry, flaky skin" recommendations. Neither claim is ours to verify without testing both directly, but the pattern is consistent enough across independent sources to be worth noting.
White cast is unlikely either way
Both are chemical sunscreens, not mineral ones. As explained in our guide to choosing a Korean sunscreen, white cast comes specifically from mineral filters like zinc oxide and titanium dioxide sitting on top of skin. Since neither of these uses a mineral filter, white cast isn't the deciding factor here the way it would be comparing a chemical formula against a mineral one.
Our take
Based on ingredient positioning and how each is typically discussed, not personal testing: if your skin runs normal to oily, Beauty of Joseon's lighter, more balancing formula is the safer starting point. If your skin runs dry or easily irritated, Round Lab's richer, more hydrating formula is the more likely fit.
See the rest of our sunscreen coverage for more comparisons, or start with how to choose a Korean sunscreen if you want the full framework before deciding.
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Price checked 9/12/2026
Price checked 9/27/2026
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Frequently asked
Which is better for oily skin, Beauty of Joseon Relief Sun or Round Lab Birch Juice?
Beauty of Joseon Relief Sun is generally the better starting point for normal to oily skin, based on its lighter, more balancing formula. Round Lab Birch Juice is positioned more for dry and sensitive skin.
Are Beauty of Joseon Relief Sun and Round Lab Birch Juice the same price?
Nearly. Beauty of Joseon runs $0.38 per milliliter and Round Lab runs $0.39 per milliliter, a one-cent difference that shouldn't factor into your decision.
Do either of these sunscreens leave a white cast?
Both use chemical, not mineral, UV filters, so white cast is unlikely with either one. White cast is specifically associated with mineral filters like zinc oxide and titanium dioxide.