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K-Secret

Collagen Boosting Secret Sun Lotion.

K-Secret Collagen Boosting Secret Sun Lotion
Supplements

About this product

A hydrating sunscreen lotion formulated with collagen, peptides, hyaluronic acid, and vitamin A, designed to combine UV protection with anti-aging and plumping skincare benefits.

Best for

Type

SupplementsLotion

Formula notes

Fragrance-freeNo drying alcohol

Full ingredients

Guru Score

87%

Approved

Early verdict · Few reviews so far
2Gurus
2Approved
0Mixed
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What the gurus are saying

This sunscreen hydrates deeply enough that some gurus skip moisturizer entirely afterwards, thanks to its 51% hydrolyzed collagen content and hyaluronic acid complex. Mad About Skin praises it as a complete skincare routine in one bottle, particularly for dry or maturing skin wanting to plump fine lines, and notes it can be switched for a mattifying formula in summer if needed. One sponsored reviewer mentioned the included retinol eye patches contain 0.1% retinol, the gentlest concentration, though they suggest using the product sparingly given its price point.
Synthesized from 2 expert reviews · most recent take September 2025
Every take, in full

What the gurus are saying.

Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.

All takes Approved takes Critical takes Mixed takes Hide sponsored
Approved
"This is the K-Secret Collagen Boosting Secret Sun Lotion. I mention this all the time. It's still my favorite and it just does everything I want it to do. You've got everything in here to make a comprehensive skincare routine. You could cleanse the skin, put this on, and you would get great results. It's broad spectrum and I think this is great for mature skin, people that are prone to fine lines and wrinkles and want a sunscreen that won't grab onto them, won't sit in them and make them more noticeable. This plumps everything out. It reduces the appearance of fine lines and wrinkles and it just takes a few years off the skin. If you have a sunscreen that grabs at every fine line and crows feet that you have and you hate that, try this. This does the opposite. It nourishes the skin. It plumps. It hydrates. I'd say this has a more natural skin finish, less glow. Both sunscreen and skin care in a bottle, and that's why it's in first place. I love it."
Top Pick: sunscreen
All 9 takes from Mad About Skin
KOREAN SKINCARE SHOWDOWN - Best and Worst Korean Skincare 2025
"One of my personal favorites is this, the K-Secret Collagen Boosting Secret Sun lotion. Advanced technologies, new generation filters, a plethora of skin care benefits. This is sunscreen done right."
ULTIMATE KOREAN SKINCARE - Next Level K-Skincare
"We've also got a great dose of collagen which is going to plump out and hydrate the skin. You've got a great hyaluronic acid complex for the plumping, a wonderful thing. We've also got an amazing blend of different anti-aging peptides, some calming and soothing ingredients, a touch of nice ceramide, and you've even got a dose of vitamin A which is going to be great for getting that cellular turnover going. This is almost an entire skincare routine in a bottle, so for those of us looking to streamline and get out the door in super quick time, cleanse the skin, maybe use your favorite toner, slap this on, you're protected, you haven't compromised in terms of your skincare routine, and you're getting a whole lot more than just sun protection. This is what I mean by innovation. I can't think of any other Western brand that offers such a comprehensive formulation in a sunscreen as this one. Great in keeping with that trend for streamlining, and one of my personal favorites. Honestly, you can't go wrong with this."
KOREAN SKINCARE AWARDS 2024 - 5 Korean Skincare Brands You Need (*Not Sponsored*)
"The K-Secret Collagen Boosting Secret Sun Lotion is great if you've got a dryer skin type or first signs of aging and you want something to plump out the skin, nourish, and reduce fine lines and wrinkles. You've got peptides in here, you've got collagen in here, you've got great filters to protect against the sun. Both of these are gamechanging. At the moment, because it's cooler and my skin's a little drier, I tend to be going for this one, the collagen boosting one. In summer I'll switch to the other one for when my skin needs to look a little less dewy and a little bit more matte. Both are amazing."
KOREAN SKINCARE AWARDS 2025 - Very Best Korean Skincare
"So I want you to choose a product that is putting the consumer first, making it easy for us to choose a great Korean sunscreen. And it's this. This is the K-Secret Collagen Boosting Secret Sun Lotion. Unlike a lot of brands which have formulated versions which comply with the outdated US regulations in order to access that market, K-Secret said, 'No, we don't want to put garbage product out there. We only want the best. And if that means that we can't access a certain market, well, so be it. We want to put our consumers first and only come out with the very best products,' and I applaud that. I think that is fantastic messaging. It's putting the customer first and foremost and we should appreciate that. So this is a ding ding ding 10 out of 10 product. You know when you buy this that you're getting the Korean version because there is only one version of it. It uses new generation filters which are going to be less sensitizing on the skin, give you great broad spectrum protection, and it also lists all the other ingredients you're getting here. So you've got collagen, which is going to boost that plumpness in the skin, give you a really nice nourishment and hydration. You've got some hyaluronic acid, which is again going to plump itself out to give that radiance boost to the skin. You've got vitamin A, which is going to help with cell turnover. You've got some calming and soothing ingredients and a touch of niacinamide. That niacinamide is at 2%, which is perfect for everyday use. So yeah, this is almost like a sunscreen and a skincare routine in a bottle."
TOP 10 KOREAN SUNSCREENS - Korean Skincare Awards 🏆
"This is the K-Secret Collagen Boosting Secret Sun Lotion. I mention this all the time. It's still my favorite and it just does everything I want it to do. You've got everything in here to make a comprehensive skincare routine. You could cleanse the skin, put this on, and you would get great results. It's broad spectrum and I think this is great for mature skin, people that are prone to fine lines and wrinkles and want a sunscreen that won't grab onto them, won't sit in them and make them more noticeable. This plumps everything out. It reduces the appearance of fine lines and wrinkles and it just takes a few years off the skin. If you have a sunscreen that grabs at every fine line and crows feet that you have and you hate that, try this. This does the opposite. It nourishes the skin. It plumps. It hydrates. I'd say this has a more natural skin finish, less glow. Both sunscreen and skin care in a bottle, and that's why it's in first place. I love it."
MAJOR MOISTURIZER MISTAKES - Stop Doing This In Your Skincare Routine
"One of my favorite sunscreens is the K-Secret Collagen Boosting Secret Sun Lotion. This is hydrating enough that if I use this in the morning I definitely don't need a moisturizer. My skin just doesn't need that level of hydration. This works and so you can save yourself a step, save yourself some of your coin, and prevent the skin feeling weighed down."
Top 10 SUNSCREENS 2025 - Best Sunscreens For Anti Aging
"This is the K-Secret Collagen Boosting Secret Sun Lotion. This is basically a sunscreen and a skincare routine in a bottle. In here you've got your niacinamide, you've got your peptides, your hyaluronic acid, you've got some collagen boosting ingredients, you've got all of that great sun protection in that SPF 50 plus. It's doing it all. So if you're somebody that literally wants to wash your skin, throw on one product and walk out the door, this is that product. Sunscreen and skin care all in one. This does leave a slightly dewy finish on the skin, which I think is great if you have more mature skin. If you're looking for something that'll plump out some of the fine lines and wrinkles, won't catch in any of them, this is a great option. It's beautiful on the skin, absolutely stunning. And I would say it's also nice and hydrating too. So it's kind of like a moisturizer, a skincare routine, a sunscreen, it's an all-in-one, and for me just an absolute gem. It is slightly on the dewier side, you can probably pick that up on the camera, but a lot of people like that. And honestly, I think this is a great option for streamlining but maintaining those results."
ADVANCED ANTI-AGING SKINCARE - Best Sunscreen For Winter
"I love K-Secret as a brand, great Korean brand, and this uses new generation filters, and the brand actually recommends you only need to reapply once every 8 hours, so instead of reapplying every 2 hours, which can become burdensome, this once every 8 hours which is amazing in winter. It's also packed full of collagen, which is one of the best hydrating humectants you're going to find on the market. It's got some peptides in here for some additional skincare benefit, and this is hands down one of the most hydrating sunscreens you will ever find. When this goes onto the skin, prepare to be shocked, because it's slightly thicker than some other Korean sunscreens, which is good because you need that extra hydration, it just kind of locks it in that little bit more effectively. But look at that, gone without a trace, you can't feel it on the skin, you have no idea you're wearing it. It's fragrance free, which again is beneficial if you're looking to minimize sensitivity, and for the finish on the skin, for the added hydration, this is like 10 out of 10, Holy Grail territory. But this is so hydrating you don't need a moisturizer alongside this unless you have super dry skin, so instead of thinking you've got to get another product for your morning skincare routine, if you're going to use a sunscreen, just use this in the place of your moisturizer, same number of products, same application time, and your skin will love it. Not only does it look gorgeous, it's quite affordable by Korean sunscreen standards, and they released their testing on this so you know exactly what you're getting in terms of performance."
NEXT LEVEL SUNSCREENS - Amazing Anti-Aging Skincare (re-upload)
"This is the K-Secret Collagen Boosting Secret Sun Lotion, and this is one of my favorites. The reason this is special and next level is it's actually formulated with 51% hydrolyzed collagen. Collagen is a super large molecule that just grabs on and retains all that moisture, plumps itself out, and in doing so minimizes fine lines and wrinkles, giving you a temporary plumpness and glow up to the skin, and this delivers it in bucket loads. It's also got four different peptides in, so it's your peptide and your collagen all in one. The best thing about this, I think, is that it's got four new generation filters in, so this is much more photostable than some old style sunscreens, meaning you have to reapply less frequently. It's more convenient, just everything about this is amazing. It's also not ridiculously expensive either, which I love. Apply this to the skin and it just disappears without a trace, so if you've got a deeper, darker and richer skin tone and you're worried about your sunscreen potentially leaving some ashiness or white cast, don't worry, this will not do that. The application is absolutely stunning. It's a chemical sunscreen and I think those filters will give you true broad spectrum coverage and just that beautiful glow up and plumpness at the same time."
Approved
"This is a product that I've actually used multiple times, I've finished two jars of it. These beautiful eye patches, I'm not putting them on right now because sunscreens, but these are basically retinol eye patches. If you know me, you know I love eye patches, I love sheet masks, I'm wasteful like that. But why are these eye patches unique and why are they different? 0.1 retinol. This is the gentlest form of retinol, this is the least concentration of retinol, perfect for your under eyes. This product is a little expensive, it's not like the cheap ones that you get on Amazon, so I like to use this very sparingly sometimes."
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Common questions

Frequently asked.

What is K-Secret Collagen Boosting Secret Sun Lotion?

A hydrating sunscreen lotion formulated with collagen, peptides, hyaluronic acid, and vitamin A, designed to combine UV protection with anti-aging and plumping skincare benefits.

Is K-Secret Collagen Boosting Secret Sun Lotion worth it?

Yes. All 2 gurus who reviewed it give it their stamp of approval, for a Guru Score of 87%.

What is K-Secret Collagen Boosting Secret Sun Lotion's Guru Score?

K-Secret Collagen Boosting Secret Sun Lotion holds a Guru Score of 87%. That is our read on how warmly the experts talk about it, based on the verdicts of 2 independent expert reviewers we have collected. At least one expert has named it a Top Pick in its category.

Who is K-Secret Collagen Boosting Secret Sun Lotion best for?

K-Secret Collagen Boosting Secret Sun Lotion is generally suited to mature skin.

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