FANCL
FANCL Core Effector, 18ml
FANCL Core Effector, 18ml
@cosme rating: 5.6/7.0
Concentrated charge of firmness deep within the stratum corneum
✓ 100% authentic
✓ Ships from Japan in 3-5 days
✓ Duties prepaid for US orders
✓ Tracked delivery via Japan Post
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What it is
Now on sale after a face wash renewal. This pre-treatment serum moisturizes and improves elasticity from deep within the stratum corneum, leaving skin supple and beautiful. Focusing on the foundational strength of the skin, which is weakened not only by aging but also by stress such as active oxygen, this product has discovered new insights into a protein called "active thioredoxin" and approaches the skin, leading to skin overflowing with elasticity with every use. In the renewed product, a unique technology has been adopted that delivers thioredoxin to the depths of the skin* in nanocapsules that are 1. 5000 the size of a pore, and silk tree extract. silk tree bark extract. has been added as a new ingredient. *Stratum corneum
Ingredients
How to use
Facial cleanser → Core Effector → Lotion → (Serum) → Emulsion (1) Before applying the lotion, dispense an appropriate amount (2 pumps) into the palm of your hand and gently apply it to your entire face. (2) Then, condition your skin with the lotion and lock in moisture with the lotion.
We ship internationally from Japan!
Frequently Asked Questions
Is this authentic?
Yes. We only buy from official retailers and directly from the brands here in Japan. Never resellers, never grey market stock.
We are beauty lovers too, so we know the worry, especially with something you are putting on your face. Authenticity is 100% guaranteed by us.
What are your shipping rates?
On orders under US$75, shipping is a flat US$20 to the United States and US$10 to all other countries.
Orders of US$75 or more ship free, applied automatically at checkout. Your exact shipping cost is shown before you pay.
How long does delivery take?
These estimates are for International Airmail (Tracked) and include 3 to 5 business days of processing in Japan.
- United States: 12 to 15 business days
- Canada, United Kingdom, France, Germany: 9 to 12 business days
- Australia, New Zealand, Denmark, Finland, India, Indonesia, Italy, Netherlands, Spain, Sweden, Switzerland: 10 to 13 business days
- China, Hong Kong, Malaysia, Singapore, South Korea, Taiwan, Thailand, Vietnam: 8 to 10 business days
- Rest of the world: 11 to 18 business days
Actual delivery can be affected by customs clearance, seasonal congestion, or carrier delays in the destination country, all of which are outside our control.
Do you offer express shipping?
Yes. As of 22 July 2026, we offer International Express Mail through Japan Post. The cost is based on order weight and is calculated automatically at checkout.
Will I pay customs or import fees?
US orders: No. As of July 1, 2026, all US orders ship DDP (duties delivered prepaid), meaning we prepay all import duties on our end. Nothing is due at your door.
Orders outside the US: Possibly. Duties and import taxes are set by your local customs authority and are not collected at checkout, so any charges on delivery are your responsibility.
We're working on rolling out prepaid duties for more countries soon.
I've noticed my skin has been shrinking since this fall (especially the fine lines under my left eye...), so I've been looking for a serum with strong anti-aging effects. I tried a sample to see how effective it would be without any additives, and then purchased the product.. : I felt firmness and suppleness after just one use! I felt the difference the next morning (I have a feeling this will be satisfying for an additive-free product). I'm also happy that there's a refill. It's free of preservatives, synthetic fragrances, synthetic pigments, petroleum-based surfactants, and UV absorbers. I like how straightforward it is.. : Introductory serums are expensive. How about cost-effectiveness? 18ml (30-day supply). 2 pumps recommended. This is the first time I've used the product, so I'd like to give it 5 stars for effectiveness, but I'll give it 4 stars and see how it goes.
The beauty advisor explained to me that this product focuses on the activated form of the protein "thioredoxin," and protects its activation by nano-encapsulating it into pores that are 1/5000 the size of a pore, delivering it deep into the skin. So, I thought I could expect results, and purchased it. FANCL's products, such as anti-aging supplements, are truly appealing. It feels amazing to use, and I can't let it go. I can actually feel my skin becoming firmer. Research also suggests it increases collagen and elastin. It's invisible, but I have high hopes for it. It's a little pricey, but I'll definitely be buying it again.
I've been using it occasionally since before the renewal, but I feel it's more effective now. It feels light to the touch, but it leaves my skin feeling plump and firm. It's fragrance-free and doesn't interfere with other products I use, so I can use a lotion other than FANCL's afterwards without any problems.
This is an introductory serum to be used immediately after washing your face. Activated thioredoxin acts on both the epidermis and dermis of the skin, boosting collagen and elastin, improving skin texture, and making it firmer and more elastic. It's also nano-encapsulated to deliver activated thioredoxin deep into the stratum corneum. It has no fragrance, is light and smooth to the touch, and seems to pair well with any cosmetics.
I've been using it occasionally since before the renewal, but I feel like the current product is even more effective. It feels light to the touch, but it leaves my skin feeling plump and firm. It's fragrance-free and doesn't interfere with other products I use, so I can use a lotion other than FANCL's afterwards without any problems.