We read 133 threads across the major beauty subreddits. Here's the honest verdict — the products people repurchase, the ones they regret, and the routine that actually shakes out.
Editorial perspective — why this fight never ends
GlowRecs Editorial Team · Reddit aggregation + analysis
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This is the single hottest product debate in K-beauty right now. In the GlowRecs Korean corpus (12 months, 27,198 documents), Beauty of Joseon and Skin1004 appear together in 95 discussions, BoJ and Round Lab in 78, Round Lab and Skin1004 in 66 — overwhelmingly in sunscreen threads. No other product trio in Korean skincare comes close.
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The reason the debate never resolves is that the three formulas optimize for different failure modes. Relief Sun optimizes for invisibility — it applies clear in seconds, which is why it's the most-mentioned Korean sunscreen on Reddit (230 corpus mentions) and why the complaints, when they come, are about grease and breakouts. The Skin1004 sun serum optimizes for hydration and glow — its fans are oily-skinned people who still want dew, its critics get eye sting. Round Lab Birch Juice optimizes for being a moisturizer that happens to be SPF50+ — dry-skin holy grail, too much for oily.
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Read the verdict from someone with your skin type, not the loudest one. That's the rule we applied to every quote below.
TL;DR — the GlowRecs showdown verdict
All three are repurchase-grade — the winner depends on your skin type.
Buy these:
- Beauty of Joseon Relief Sun — the default pick: invisible, fast, no white cast ($19)
- Skin1004 Hyalu-Cica Water-Fit Sun Serum — oily or combo skin that still wants a glowy finish ($35)
- Round Lab Birch Juice Moisturizing Sunscreen — dry skin; doubles as your morning moisturizer ($35)
Skip these:
- Beauty of Joseon Stay Fresh Tone-Up — goes streaky and ghost-white at a proper SPF dose
- Innisfree Long-Lasting — hybrid formula; the mineral part runs and stings when you sweat
How we ran the showdown
GlowRecs is a Reddit-evidence engine: we don't test products in a lab, we index what thousands of long-term users report. For this verdict we took every 2026-season thread in which at least two of the three sunscreens are discussed together (144 documents), weighted multi-product reviews from single authors highest — the gold standard is one person wearing all three through a summer — and cross-checked against each product's full mention history: 230 corpus mentions for Relief Sun, 195 for the Skin1004 sun serum, 116 for Round Lab Birch Juice. Amazon ratings agree with Reddit's ranking, for what it's worth: 4.1–4.7 stars across the trio.
Beauty of Joseon Relief Sun — the default pick
Relief Sun (Rice + Probiotics, SPF50+ PA++++) is the most-discussed Korean sunscreen on Reddit, and the tone of its best reviews is remarkable mostly for how boring they are — it just works, season after season.
Relief Sun: Rice + Probiotics SPF50+
Lightweight Korean sunscreen that feels like nothing on skin—no white cast, applies clear in seconds. Some find it too greasy or breakout-triggering.
"This my favorite sunscreen!! I found it much better than Elta MD, BOJ and super goop."
u/TheChampagn3, who reviewed seven sunscreens side by side on r/AsianBeauty (803 upvotes, oily-combination sensitive skin): "My skin feels and looks better when I wear this. I've gone through several tubes now. I can wear this in the dry winter and humid summer. No pilling, no bad fragrance. I haven't found one I like better." u/0rchid-tree puts the application speed plainly: "it's completely clear so I can apply it in about five seconds."
The catch is real, though. A persistent minority — clustered on oily and acne-prone skin — report grease and breakouts. u/karasu_zoku calls it "cooking grease," and breakout reports recur often enough that GlowRecs flags it as not irritation-safe for acne-prone users. A few users with reactive eyes (u/froggy--) also found it stings near the eye area. If that's you, the Skin1004 or a dedicated eye-area stick is the workaround.
Buy Beauty of Joseon Relief Sun on Amazon
Skin1004 Hyalu-Cica Water-Fit Sun Serum — the glowy one
The Skin1004 sun serum is the pick when you want SPF50+ that behaves like a hydrating serum. u/TeufelRRS (super oily, acne-prone) ranks it among their favorites precisely because "the Skin1004 is more moisturizing and glowy compared to the other 2 — it's great if my skin starts to feel dry." Another corpus reviewer sums up the texture: "the skin1004 sun serum is super moisturizing but still lightweight." u/No_Mousse133, comparing it directly against BoJ's lighter Aqua-Fresh in Mumbai humidity, rates the two "equally — both have a similar texture and isn't too oily but dewy."
Skin1004 sun serum
SPF50+ that feels like a hydrating serum—dewy, lightweight, the oily-skin favorite of the BoJ/Round Lab trio. Can sting reactive eyes.
"the skin1004 sun serum is super moisturizing but still lightweight"
Two recurring complaints. First, eye sting: u/froggy-- — "the skin1004 suncream is amazing, but I find that it will burn around my eyes or other areas of my face that become easily irritated." Second, finish: if you hate any dew at all, this is not your formula — u/TheChampagn3's drier winter skin "felt kind of tight wearing this" and she disliked the pump packaging. It reads best on oily/combo skin in warm weather.
Buy Skin1004 Hyalu-Cica Water-Fit Sun Serum on Amazon
Round Lab Birch Juice Moisturizing Sunscreen — the dry-skin hybrid
Round Lab Birch Juice is the trio's moisturizer-first formula, and dry-skin Reddit treats it accordingly. u/LukasLUL: "It keeps my skin moisturized all day but doesn't feel heavy or greasy at all." u/Ainsley9834, who stocks up on sunscreens in Korea every work trip and rated it 4.5 stars in her r/koreanskincare roundup: "Used to be my go-to… Still a great option for dry skin" — she only moved on to an even lighter Torriden formula. With 4.5 stars across ~1,950 Amazon reviews, it's also the best-reviewed of the three on Amazon itself.
Birch Juice Sunscreen
Lightweight, hydrating sunscreen with no white cast that layers well under makeup. Leaves a dewy, shiny finish that won't work for oily skin.
"I also love the roundlab birch!"
The flip side follows directly from the formula: it leaves a dewy, borderline shiny finish. GlowRecs' sentiment data shows the negative mentions cluster on oily skin — if your nose is an oil slick by noon, Birch Juice will get you there by ten. One smaller-sample warning from the wider corpus: a couple of users reported their skin "did not like it at all," so patch-test as with any new SPF.
Buy Round Lab Birch Juice Sunscreen on Amazon
Head-to-head: which one for your skin type
This is the question people literally post — u/sophia_ly23's "Beauty of Joseon vs Skin1004 vs Numbuzin for combo skin" thread pulled 113 upvotes of exactly this triage. Here's the GlowRecs read of the full corpus:
Normal or combination skin, want it invisible: Relief Sun. Fastest application, zero white cast, the least "I'm wearing sunscreen" feel of the three. Watch for breakouts if you're acne-prone.
Oily or combination skin, want glow without grease: Skin1004 Water-Fit Sun Serum. Dewy but lightweight; the oily-skin reviewers in our corpus consistently prefer its finish to Relief Sun's. Avoid if your eyes sting easily.
Dry skin, want one less morning step: Round Lab Birch Juice. It genuinely replaces moisturizer for most dry-skin reviewers. Oily skin should look elsewhere — including at Round Lab's own lighter calming line.
Sensitive, reactive, or eye-sting-prone: none of the three is a guaranteed safe pick — Relief Sun and the Skin1004 both draw eye-sting reports. Patch-test, or check the mineral picks in our Korean sunscreen guide.
Where to buy them — the 2026 import reality
A year ago the default answer was "order from Olive Young Global or YesStyle." That changed: new FDA import rules for sunscreens plus the shutdown of Olive Young's global store made direct Korean orders slow, taxed or impossible for many US buyers — it's the single most-upvoted topic in r/KoreanBeauty this year. The practical consequence, visible across our corpus, is that Amazon US (official brand storefronts) is now the third most-discussed place to buy K-beauty and the fastest legitimate route for these three sunscreens. All three links above go to the US listings GlowRecs validates weekly for liveness and seller quality. For the full Amazon-available roster, see our Korean skincare on Amazon hub.
The bottom line from GlowRecs
There is no single winner — there's a winner per face. The GlowRecs verdict from 144 head-to-head discussions: Beauty of Joseon Relief Sun is the best default Korean sunscreen for most people; Skin1004's Water-Fit Sun Serum beats it for oily skin that wants a glowy finish; Round Lab Birch Juice beats both for dry skin that wants SPF and moisturizer in one tube. All three are repurchase-grade — pick by skin type, patch-test, and you're done shopping for the summer.
FAQ
Is Beauty of Joseon or Skin1004 sunscreen better?
For most skin types, Beauty of Joseon Relief Sun — it's invisible, fast, and the most repurchased Korean sunscreen on Reddit. For oily or combination skin that wants a dewy finish, the Skin1004 Hyalu-Cica Water-Fit Sun Serum is the better pick: more hydrating and glowy, per long-term users who've worn both.
Beauty of Joseon vs Round Lab: which is better for dry skin?
Round Lab Birch Juice. It's a moisturizer-grade formula with SPF50+ — dry-skin reviewers say it replaces their morning moisturizer entirely, which Relief Sun doesn't quite do.
Which Korean sunscreen is best for oily skin?
From this trio, the Skin1004 sun serum — its dew reads as glow, not grease, on oily skin. Some oily-skin users find Relief Sun too greasy ("cooking grease" is a real quote), and Round Lab Birch Juice is generally too rich for oily faces.
Does Beauty of Joseon Relief Sun break you out?
It can. A consistent minority of acne-prone reviewers report breakouts, which is why GlowRecs doesn't flag it irritation-safe despite its overall positive sentiment. Patch-test for a week before committing your whole face.
Is the Skin1004 sun serum actually a sunscreen?
Yes — "sun serum" is texture marketing. The Hyalu-Cica Water-Fit Sun Serum is a full SPF50+ PA++++ chemical sunscreen; it just spreads and feels like a hydrating serum.
Can I still buy these Korean sunscreens in the US in 2026?
Yes, on Amazon US — that's now the practical route since the FDA import changes and Olive Young Global's shutdown made direct ordering from Korea unreliable. All three of these sunscreens have live official US listings, which GlowRecs re-validates weekly.
Heads up: Some links above are Amazon affiliate links. Buying through them helps keep GlowRecs running — at no cost to you. We don't take PR samples. The affiliate cut never affects rankings. Read our full methodology →