Round Lab Camellia Deep Collagen Sun Serum Review: SPF 50+ With Collagen and Retinoid

If you have read my Round Lab Birch Juice sunscreen review, you know I take sunscreen seriously. The Camellia Deep Collagen Firming Sun Serum is the one I get most enthusiastic about, and the one I tell friends to try. It is SPF 50+ PA++++, it feels like a serum, and it has a “firming” skincare story on top.

I also want you to buy it with open eyes. I went through Round Lab’s Korean store, the brand’s Camellia line on its US store, an ingredient database and a retailer page, and I name each source below. I’m not a dermatologist, and this is not medical advice.

Key takeaways

• SPF 50+ PA++++ in a 50 ml bottle, with five chemical UV filters.
• Light, liquid, milk-like texture with no scent. On my skin it absorbs without a trace, gives an instant glow and works perfectly under makeup.
• The “collagen” is listed in tiny amounts (parts per million). I treat it as a nice extra, and the real anti-aging work is the sun protection.
• It lists hydroxypinacolone retinoate, a retinoid ester. Be careful if you are pregnant or retinoid-sensitive.
• When I checked, it was not on Round Lab’s US store, so look at K-beauty retailers or the Korean store.

My experience: using it since April 2025

I have normal skin, and this sun serum has been part of my routine since April 2025. The texture is what hooked me: it is light and liquid, close to a milk lotion, with no scent at all. It absorbs quickly and leaves no trace on my skin, and I get an instant glow. It works perfectly under makeup.

My only complaint is that the tube is not endless. I would recommend it to absolutely everyone who wants the perfect Korean sunscreen and whose skin gets along with the ingredients, and I will always buy it again. I buy mine from both the Korean store and from retailers.

Product facts

Camellia Deep Collagen Sun Serum, at a glance

Good forDaily sun protection with a light, serum-like, “firming” skincare feel

ProtectionSPF 50+, PA++++

Size and price50 ml. 22,400 KRW on sale (28,000 KRW listed) on Round Lab’s Korean store, checked October 2026

Key ingredientsCamellia japonica flower extract, hydrolyzed and soluble collagen, hydroxypinacolone retinoate, niacinamide, sodium hyaluronate, adenosine

How to useLast skincare step, applied evenly on all UV-exposed areas

FYIChemical filters and a retinoid ester; patch-test, and ask your doctor if pregnant or breastfeeding

What’s inside and what it targets

Round Lab’s online page shows the detailed ingredient list only as an image, so I took the full list from the box of my own tube. It reads:

The box also names Round Lab’s own “Camellia Collagenol” complex, made of camellia japonica flower extract, quercetin and inositol, which the brand says supports skin elasticity.

what’s inside

The camellia line is tied to Jeju on Round Lab’s US store. Five UV filters do the sun protection. The skincare cast sits further down the list.

UV filters (ethylhexyl triazone, Mexoryl SX, Uvinul A Plus, polysilicone-15, Tinosorb S)

The sun protection part. These are organic (chemical) filters and give the broad-spectrum SPF 50+ PA++++ rating.

Niacinamide

Appears fairly high in the list. A well-known brightening and tone-evening ingredient, and a good partner to daily SPF.

Collagen and camellia japonica flower extract

A retailer page lists 0.02 ppm (hydrolyzed collagen), 0.01 ppm (soluble collagen) and 0.101 ppm (camellia flower extract). These are very small amounts, so I enjoy them as part of the hydrating, silky feel.

Hydroxypinacolone retinoate (HPR)

A retinoid ester that sits near the end of the list with no stated percentage. It is the “firming” wild card, and the reason to be careful if you are pregnant or retinoid-sensitive.

also made with water, propanediol, butylene glycol, sodium hyaluronate, adenosine, cyanocobalamin, inositol, quercetin, glycerin

This table summarizes the brand’s and retailers’ descriptions and the ingredient list. My own experience is above.

Why I love it, and what I won’t pretend about

The best sunscreen is the one you wear every day, and this is the one I enjoy wearing. The texture is watery, smooth and not sticky, which Round Lab describes as bursting with water when it touches the skin. That is the whole secret: when sunscreen feels this nice, daily SPF stops being a chore.

Now the honest part. The listed amounts of collagen and camellia are tiny, parts per million, so I do not expect a collagen-boosting miracle from the bottle. The real firming work is the sun protection: the American Academy of Dermatology says UVA rays are the main culprit behind premature skin aging, and this serum has PA++++ for exactly that. The camellia, collagen and retinoid are the lovely bonus, not the reason to buy.

How I apply it

• Last step of the morning routine, after moisturizer, evenly on all UV-exposed areas as the brand says. It absorbs quickly and works perfectly under makeup on my skin.
• Enough, not a thin layer. I use the two-finger rule for the face, then the neck, ears and the backs of my hands, as the American Academy of Dermatology suggests.
• Reapply in strong sun, about every two hours and after swimming or sweating.
• Calm night routine. If you use a retinoid or strong acids in the evening, add one new active at a time. See my skin guide.

Camellia Deep Collagen or Birch Juice?

Both are Round Lab sun serums I like. Birch Juice is the light, hydrating everyday classic, while Camellia Deep Collagen is the one with the firming skincare story. The filters also differ: the US versions of the Birch Juice sunscreens I checked list avobenzone, homosalate and octisalate, while this serum lists five different organic filters. You can read all four Birch Juice versions compared in my Birch Juice review.

Where to buy it, and what it costs

It was not on Round Lab’s US store when I checked in October 2026. On the brand’s Korean store the 50 ml bottle is listed at 22,400 KRW on sale (28,000 KRW regular), and it is marked as shippable overseas. K-beauty retailers also stock it, usually at a higher price. I buy it both from the Korean store and from retailers. Buy from the brand or a retailer you trust to avoid fakes.

A sunscreen you want to wear every single day is the best anti-aging product there is.

Round Lab Camellia Deep Collagen sun serum: common questions

What is Round Lab Camellia Deep Collagen Firming Sun Serum?

It is a Korean sun serum from Round Lab, listed at SPF 50+ PA++++ in a 50 ml bottle. It combines sun protection with a “firming” care story built on camellia flower extract, collagen, hydroxypinacolone retinoate, niacinamide and hyaluronate.

Does sunscreen with collagen make your skin firmer?

The collagen in this serum is listed by a retailer at only 0.02 ppm for hydrolyzed collagen and 0.01 ppm for soluble collagen, so I see it as a hydrating, skin-feel ingredient and not a collagen rebuilder. What genuinely protects the collagen you already have is the sunscreen itself, because the American Academy of Dermatology says UVA rays are the main culprit behind premature skin aging.

What UV filters does it use, and is it chemical or mineral?

According to the ingredient list on the box, it uses chemical (organic) filters: ethylhexyl triazone, terephthalylidene dicamphor sulfonic acid, diethylamino hydroxybenzoyl hexyl benzoate, polysilicone-15 and bis-ethylhexyloxyphenol methoxyphenyl triazine. There is no zinc oxide or titanium dioxide on that list.

Does it leave a white cast?

On my skin it absorbs perfectly without a trace and gives an instant glow. The retailer describes it as watery and smooth, and one customer review I found also reports no white cast and good wear under makeup, though that reviewer found it richer than expected and might skip it on very hot days.

Does it contain retinol?

It lists hydroxypinacolone retinoate (HPR), a retinoid ester, near the end of the ingredient list. The concentration is not given. If you are pregnant, breastfeeding or very retinoid-sensitive, ask your doctor before using it.

Is it available in the US?

When I checked in October 2026 it was not listed on Round Lab’s US store, but it is on the brand’s Korean store (50 ml, 22,400 KRW on sale, listed at 28,000 KRW) and through K-beauty retailers. Availability changes, so check before you buy.

How do I use it?

Use it as the last skincare step in the morning, applied evenly on all areas exposed to UV. I use the two-finger rule for the face, then neck and ears, and reapply when I’m outside for long.

Is it good for sensitive or acne-prone skin?

The brand markets it as dermatologically tested and suitable for sensitive skin, but I can’t promise that for every skin. It contains a retinoid ester, niacinamide and chemical filters, so patch-test first and ask your dermatologist if you have a skin condition.

How is it different from the Round Lab Birch Juice sun serum?

Birch Juice is the lightweight, hydrating everyday classic, while Camellia Deep Collagen adds the “firming” story with collagen, camellia and HPR. I compare the four Birch Juice versions in my Round Lab Birch Juice sunscreen review.

About the author

Hi, I’m Anna. I share honest skincare reviews, simple routines and gut-friendly habits from my own life, on Instagram, on YouTube and here. I am not a doctor or a dietitian: I read the research and official sources, link them at the end of each note, and keep my claims careful. More about me and how I write these notes.

Sources

• Camellia Deep Collagen Firming Sun Serum 50 ml, Round Lab official Korean store (size, price).
• Camellia Deep Collagen Firming Ampoule, Round Lab official US store (the camellia line’s Jeju origin story).
• Round Lab Camellia Deep Collagen Firming Sun Serum, product box (full ingredient list, how to use, Camellia Collagenol).
• Round Lab Camellia Deep Collagen Firming Sun Serum, Dodoskin retailer page (texture, claims, ppm values, how to use, a customer review).
• Sunscreen FAQs, American Academy of Dermatology (UVA and premature aging, SPF 30 or higher, reapplying).
• How to apply sunscreen, American Academy of Dermatology (amount for the face, ears and neck, reapplying).

Prices, availability and formulas checked in October 2026 and can change. Always read the ingredient list on your own packaging.