Vitamin C Serum Showdown: Klairs VS By Wishtrend

It goes without saying that vitamin C is one of the best ingredients out there for your skin. The hardworking substance has been proven to fade pigmentation, brighten the complexion, neutralize free radicals, assist in wound healing, and boost collagen production. Yes, that’s a lot of benefits. Whether you’re a teenager struggling with acne-prone skin or are already in your 30s (and older), vitamin C can improve your skin.

Two of our bestselling vitamin C serums are the Klairs Freshly Juiced Vitamin Drop (also known as the Freshly Juiced Vitamin C Serum) and By Wishtrend Pure Vitamin C21.5 Advanced Serum. But simply mentioning the two together begs the question — what’s the difference and which one should I choose?

Don’t worry because we’re here to answer this very important question. But before we get down to the differences, let’s talk about similarities.

For those of you who are new to skincare, you may not know that Klairs and By Wishtrend are two brands made by the same company, Wishtrend. That’s right — they’re sister brands! Although Klairs is more or less the more popular of the two (as of now *wink*), it does not make By Wishtrend products any less amazing. In fact, both brands are made of the highest quality, one that you’d expect from a reputable Korean company. While the Klairs brand focuses on creating products for those with sensitive skin, By Wishtrend was developed to target the various skin concerns of Wishtrenders, giving rise to products that are supercharged with active ingredients to visibly improve the skin. Both brands, of course, are firmly against animal testing and are 100% cruelty-free.

Now let’s move on to differentiating the two products!


It’s important to keep in mind that Klairs products are formulated for sensitive skin, that’s why the Freshly Juiced Vitamin Drop contains only 5% ascorbic acid. Although small relative to other vitamin C products, it’s still very effective for fading pigmentation and brightening the complexion. It’s further infused with botanical extracts such as centella asiatica, grapefruit, and broccoli to help the skin recover from blemishes. It has 45 ingredients in total, including peptides and ferment extracts for anti-aging, and sodium hyaluronate for that extra boost of hydration.

What makes the By Wishtrend Pure Vitamin C21.5 Advanced Serum stand out among the rest is its high concentration of vitamin C — a whopping 21.5%! It has got to be one of the highest, if not the highest, in the market right now. Even more impressive is the fact that the formulation only has 10 ingredients, 70% of which is sea buckthorn water, an ingredient that soothes blemishes and gives the skin much-needed hydration. The other ingredients include allantoin, green tea, and sodium hyaluronate, all of which are stars in their own rights.

Consistency and texture

The Klairs Freshly Juiced Vitamin Drop has a runny consistency like water, but feels like oil when applied. It may sound like a big turn off, but there’s really nothing to fuss about as it absorbs into the skin quickly and leaves no greasy residue behind. The By Wishtrend Pure Vitamin C21.5 Advanced Serum also has a watery consistency, but unlike the Klairs, the By Wishtrend feels like a regular serum when applied, probably owing to the fact that 70% of this is sea buckthorn water. It sinks into the skin beautifully, just like water.


Because the Klairs Freshly Juiced Vitamin Drop consists of only 5% vitamin C, most individuals can use this once a day. On the other hand, the By Wishtrend Pure Vitamin C21.5 Advanced Serum contains an impressive 21.5% of vitamin C, which when applied daily may cause irritation. Thus, the recommended usage frequency is only two to three times a week. Don’t worry, as less frequent usage will not make the product any less effective.

Who it’s for

The Klairs Freshly Juiced Vitamin Drop is great for all skin types despite its oily texture. It’s the perfect choice if you’re new to the vitamin C game as it only contains 5% of ascorbic acid. With consistent use, you’ll see a brighter complexion and less visible pigmentation.

However, the By Wishtrend Pure Vitamin C21.5 Advanced Serum is the better choice if (1) you’re dealing with super stubborn marks, (2) you want results immediately (as early as two weeks), or (3) sensitive to fermented ingredients. With its powerful 21.5% concentration, it’s perfect for those looking to up their vitamin C game.

Hopefully all your questions were answered in this article. If you have any more that we haven’t discussed, or you want to clarify something, feel free to comment and we’ll be right there to help!

4 replies on “Vitamin C Serum Showdown: Klairs VS By Wishtrend

Leave a Reply

Your email address will not be published. Required fields are marked *