Last updated: September 24, 2026
Round Lab Birch Juice Moisturizing Sunscreen and Beauty of Joseon Relief Sun: Rice + Probiotics are two of the most popular Korean sunscreens worldwide. Both are lightweight, high-protection daily sunscreens with no white cast, and both have fans across all skin types. They are close competitors, so the differences come down to finish, hydration level, and how they behave on oily versus dry skin.
Quick comparison
| Feature | Round Lab Birch Juice Moisturizing Sunscreen | Beauty of Joseon Relief Sun |
|---|---|---|
| Protection | SPF 50+, PA++++ | SPF 50+, PA++++ |
| Filter type | Chemical filters (check label) | Chemical filters, including modern broad-spectrum filters (check label) |
| Key extras | Birch sap, hyaluronic acid-type humectants | Rice extract, grain ferments, niacinamide (check label) |
| Finish | Dewy, moisturizing | Natural, slightly dewy, lightweight |
| Typical price (50 ml) | ~$18–24 | ~$15–20 |
| White cast | None for most | None for most |
Why Korean sunscreens feel different
Korean sunscreens often use newer UV filters that offer strong UVA protection with elegant textures. Some of these filters are not approved in the US, which is why many American shoppers import them. Formulas can differ between versions sold in Korea and elsewhere, so always check the label on the version you buy.
PA++++ explained
PA ratings measure UVA protection, with four plus signs being the highest category. UVA rays contribute to photoaging and pigmentation, so a high PA rating matters for anyone concerned with dark spots or fine lines.
Finish and skin type fit
| Skin type | Better pick | Why |
|---|---|---|
| Dry | Round Lab | More moisturizing, dewy |
| Normal | Either | Both comfortable |
| Oily | Beauty of Joseon | Lighter finish, less shine |
| Combination | Beauty of Joseon | Balanced finish |
| Dehydrated oily | Round Lab in thin layers | Hydration without heaviness |
| Under makeup | Beauty of Joseon | Slightly less slip |
How to apply
Use about two finger-lengths for face and neck, as the last step of your morning skincare. Pat rather than rub if you notice pilling. Reapply every two hours outdoors and after sweating, swimming or towel drying. Neither is marketed as a sport sunscreen, so choose a water-resistant option for beach days.
Layering
Both sit well over vitamin C, niacinamide and light moisturizers. Dry skin can apply Round Lab directly over a hydrating serum and skip a separate moisturizer in humid weather. Oily skin can apply Beauty of Joseon over a light gel moisturizer or directly after serum.
Sensitive skin considerations
Chemical filters may sting sensitive eyes, particularly when sweating. If you experience stinging, apply less around the eye area and consider a mineral sunscreen for that zone. Both products may contain botanical extracts; people with plant allergies should check ingredient lists.
Value and availability
Beauty of Joseon is usually slightly cheaper and widely available in the US and Europe. Round Lab is also widely available but can be a few dollars more. At the recommended daily amount, a 50 ml tube lasts roughly 5–7 weeks, so the price difference adds up to around $15–30 a year. Buy from authorized retailers to avoid counterfeits, which have been a problem with popular K-beauty sunscreens.
Trying both without waste
If you cannot decide, buy one, use it daily for three to four weeks, and note midday shine, dryness, pilling and any stinging near the eyes. Then switch. Because both tubes are relatively small, testing both costs less than one premium Western sunscreen, and you end up with a clear answer for your skin in your climate.
Who should avoid each
People sensitive to chemical filters should consider mineral sunscreens instead. Those with rice, birch or other plant allergies should check the respective labels. Anyone who has had reactions to sunscreens should consult a dermatologist, who can arrange patch testing. Stop use if you notice itching, rash or swelling.
FAQ
Are these sunscreens reef-safe?
“Reef-safe” is not a regulated term. If this matters to you, check which filters each formula contains and local regulations for beach use.
Can I use them as moisturizer?
In humid climates, oily and normal skin may find them hydrating enough. Dry skin usually benefits from a moisturizer underneath, particularly with Beauty of Joseon.
Bottom line
Choose Round Lab Birch Juice Moisturizing Sunscreen for a dewy, hydrating finish that suits dry and normal skin. Choose Beauty of Joseon Relief Sun for a lighter, more balanced finish that works well on oily and combination skin and under makeup. Both offer high UVA and UVB protection with no white cast, so pick by finish and apply generously every day.
