The little red Medicube bottle is easy to notice. Working out whether it deserves a spot next to your everyday moisturizer? That takes a little more thought.
The EGF NAD+ Firming Serum is worth shortlisting if you want a light serum for your face and neck, without adding another rich layer. Its biggest everyday attraction is how easily it can fit into a routine. If you already love your current serum, though, the new ingredient names alone aren’t a reason to replace it.
At a glance
Medicube EGF NAD+ Firming Serum · 30mL / 1.01 fl oz
- Best fit
- A lightweight step before cream, especially if thick skincare puts you off.
- What stands out
- A fluid texture, plus encouraging feedback about absorption and layering.
- The trade-off
- It adds a serum step, not a replacement for moisturizer. Visible results aren’t everyone’s experience.
- US price
- $26 for 30mL.
- Korea price
- ₩39,000 member price; ₩58,500 listed price.
- Where it goes
- After cleansing and any toner, before moisturizer.
Prices checked October 24, 2026, before delivery and any US sales tax.
The appeal is a light layer, not a heavy finish
If you’ve ever stopped using a serum because your face felt coated, texture is probably the first thing you want to know about. Medicube describes this one as a watery formula. A reviewer on Hwahae, a Korean beauty-review platform, describes a little more body than water, but a light feel once spread.
The customer feedback gives that description some useful context. On Medicube’s US store, two reviewers mention that it works well alongside their other products; another describes a soft, dewy feel. A Stylevana reviewer also singles out the lack of stickiness.
That makes it an interesting option for someone who wants to keep a routine comfortable rather than build up several rich layers. Think of it as the middle step: a little serum, then the cream you already enjoy.
Dry skin still deserves its moisturizer. The Hwahae reviewer likes the lightness but expects to need more hydration in colder weather. If your cheeks are already craving a thick cream, this is an optional addition underneath it—not the first thing we’d buy to solve that problem.
What are EGF and NAD+ doing in the name?
In Korea, this is sold as an EGF NAD firming ampoule. On the US store, you’ll see EGF NAD+ Firming Serum. Both stores show the same bottle label—EGF NAD FIRMING SERUM—and list the same headline ingredients.
EGF is short for epidermal growth factor; NAD refers to nicotinamide adenine dinucleotide. Medicube puts these ingredients at the center of the product’s firmness-focused positioning. The formula also lists niacinamide, ectoin, adenosine and several peptides.
You don’t need to memorize that list to decide whether the serum belongs in your bathroom. The more useful question is whether you want this particular combination in a light daily step. If your current routine already feels good and looks good on your skin, a longer ingredient list isn’t automatically an upgrade.
For readers who avoid added perfume, neither official ingredient list names fragrance or parfum. That’s a useful shopping detail; it isn’t a promise that every sensitive skin type will love the formula.
How to use it without making your routine complicated
There’s no need to rebuild your whole shelf around this serum. Keep your familiar cleanser and cream, and give the new product one clear place between them.
- Cleanse, then use toner if it’s already part of your routine. A separate toner isn’t something you need to buy just for this.
- Spread 2–3 drops across your face and neck. That’s the brand’s total amount for both areas, not 2–3 drops for each. Smooth it on gently.
- Follow with moisturizer. In the morning, finish your skincare with sunscreen. Medicube’s directions allow morning and evening use.
Starting with one new product makes it easier to see how it fits. We’d choose that over buying a whole matching set at once—especially if your routine already includes exfoliating products or retinol.
You also don’t need to buy a Medicube device to use it. The serum has ordinary face-and-neck directions on its own. If you’re curious about another product from the brand, our Zero Pore Pad 2.0 guide looks at a different step, so you can decide what your routine actually needs.
Is it worth $26?
At the US official price, a 30mL bottle works out to about $0.87 per mL. We’d treat it as a considered single-bottle purchase: worth trying when you specifically want a light serum, rather than a reason to buy three backups before you’ve opened the first.
The Korean official online store lists ₩58,500, with a ₩39,000 member price. That lower price is for members shopping through the store’s member checkout; Naver Pay checkout doesn’t qualify. Domestic delivery adds ₩3,000 on orders below ₩60,000.
Shopping during a Korea trip? Compare the price you can actually pay with your home-country total. A Korean brand name on the bottle doesn’t automatically make buying it in Korea the better deal. Our K-beauty price-check guide helps with that comparison.
What might disappoint you?
The “firming” part can be less noticeable than the pleasant texture. Some US-store reviewers report a firmer feel or softer-looking lines; one says it made no difference. If a dramatic change is the only outcome that would make you happy, this wouldn’t be our first recommendation.
One low-rated review also describes irritation after using two Medicube sets. Several products were involved, so it isn’t a clear report about this serum alone. The practical takeaway is simple: introduce one new product at a time, rather than changing your whole routine in one evening.
Who we’d put it on the shortlist for
Someone who enjoys skincare, dislikes heavy layers and wants a face-and-neck serum before cream. The light format is the strongest reason to be interested. If firmness care is also on your shopping list, that gives you a more specific reason to consider it than simply following a trend.
If you need richer moisture, put that budget toward a moisturizer first. If your existing serum already gives you the finish you enjoy, keep it. But if that middle step is missing—and the red bottle has caught your eye—starting with one bottle makes more sense than committing to the whole range.
See the serum on Medicube’s official US store →
Product information and sources
Based on Medicube’s official product information and published customer feedback. Information and prices checked October 24, 2026. Product images: Medicube.
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