When in my routine should I apply the mask, and how long should I leave it on?

Use it after cleansing and toner. Fit the sheet over your face while avoiding the eye area, then leave it on for 10–20 minutes.

What should I do with the remaining essence after removing the sheet?

Gently pat the remaining essence into your skin until it is absorbed.

Is this older 10-sheet formula the same as the mask currently shown on the brand's website?

No. The current official 25 g single-mask formula is a renewal that lists 2,500 ppm yuja plus betaine, gluconolactone, LHA and retinal. The researched older 10-sheet formula lists 10,000 ppm yuja.

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SOME BY MI

Yuja Niacin 30 Days Care Serum Mask

Q: How much niacinamide and yuja extract does the researched formula contain?

The researched older 10-sheet formula contains 2% niacinamide and 10,000 ppm Citrus Junos fruit extract.

Q: Does the formula contain aromatic citrus or botanical oils?

Yes. The declaration lists tangerine peel, grapefruit peel, patchouli and palmarosa oils, together with limonene and geraniol. It does not list a separate Parfum entry.

What it is: A 10-sheet facial serum mask set that brings moisturizing and dullness-focused care into a 10–20 minute step.

Moisture-focused care
Care for visible dullness
10 portioned masks
10–20 minute wear

Net weight: 10 sheets, 25 g each

Yuja Niacin 30 Days Care Serum Mask

10ea ·€28.88

Moisture-focused care

Care for visible dullness

10 portioned masks

10–20 minute wear

Main active: Niacinamide
Intensity: Standard

PRODUCT DETAILS

When your complexion looks dull and low on moisture, this set offers moisture-focused care for a fresher-looking complexion. It contains 10 individually portioned facial serum sheet masks, each with 25 g of essence. This is a sheet mask rather than a bottled leave-on serum.

The 10-sheet formula contains 2% niacinamide and 10,000 ppm yuja extract. Yuja, glutathione and arbutin are included for moisturizing and nourishing care, while four kinds of vitamins support a more revitalized look for dull skin. Three forms of hyaluronic acid and panthenol add familiar moisture-supporting ingredients to the formula.

Ten individually portioned masks give the set ten separate applications. The ingredient list also includes tangerine, grapefruit, patchouli and palmarosa oils, together with limonene and geraniol. It does not list a separate Parfum entry, though the aromatic ingredients are still worth noting when you choose your mask.

Learn more

GOES WELL WITH

100 VITA-LIGHT Reedle Shot€9.00

1025 Dokdo Eye Cream€20.88

1025 Dokdo Sun Cream€17.98

100 Collagen Reedle Shot Stick Pouch€8.88

100 PRO CICA Reedle Shot Stick Pouches€9.00

100 Reedle Shot Stick Pouch€7.88

100 RETI-A Reedle Shot€9.00

1025 Dokdo Cleanser€10.99

Moisture and visible radiance are the focus, supported by the yuja blend, vitamins and moisture-minded ingredients.

Moisture-focused care
Care for visible dullness

Key Ingredients

Niacinamide

Helps visibly brighten uneven tone and support the skin barrier.

Whole and halved yellow yuja citrus fruits with visible seeds and juice droplets arranged on a pale ceramic plate in warm, diffused light.

Citrus Junos Fruit Extract

Yuja fruit extract is a citrus botanical that helps support a fresh, hydrated skin feel.

Abstract still life of translucent blush forms, soft mauve and peach folds, and clear droplets on a warm ivory studio surface.

Arbutin

The beta-D hydroquinone glucoside used in tone-focused formulas, with emerging product-specific evidence and separate identity from Alpha-Arbutin.

Clear hydrogel spheres and droplets on a pale lilac background.

Hyaluronic Acid

Helps hydrate and visibly plump the skin.

Panthenol

Pro-vitamin B5 that helps skin hold moisture and feel softer and more comfortable.

Three yellow-and-cream sheet-mask sachets standing in front of the matching outer pack.

Concerns & Benefits

Your Concerns

1
Dehydration
For skin that feels low on moisture and could use a focused hydrating step.
2
Dullness
For a complexion that looks muted and short on visible radiance.

Our Benefits

How To Use

1After cleansing, prepare your skin with toner.
2Fit the sheet evenly over your face, avoiding the eye area.
3Leave it on for 10–20 minutes, then remove the sheet and gently pat the remaining essence into your skin until absorbed.

Tall product-detail collage with small mask and application panels.

Frequently asked questions

Is this a sheet mask or a bottled serum?

It is a facial serum sheet mask. The set contains 10 individually portioned masks rather than a bottle of leave-on serum.

Keep learning

Customer reviews

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SPF 50+ PA++++ protection in a lightweight, no-white-cast lotion.

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Beginner-friendly texture care with moisture, firmness and a refreshing, non-sticky finish.

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Daily texture care with soothing hydration, one travel-friendly pouch at a time.

2 ml × 10 pouches€9.00

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100 Reedle Shot Stick Pouch

A travel-size evening booster for smoother-feeling, more refined-looking skin.

2 mL × 10€7.88

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A beginner-friendly evening serum for smoother-looking texture, refined-looking pores and radiant skin.

2 ml × 10 sachets€9.00

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Creamy, slightly acidic foam for a comfortable cleanse

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SOME BY MI Yuja Niacin 30 Days Care Mask, 10 Sheets

SOME BY MI

Yuja Niacin 30 Days Care Serum Mask

What it is: A 10-sheet facial serum mask set that brings moisturizing and dullness-focused care into a 10–20 minute step.

Moisture-focused care
Care for visible dullness
10 portioned masks
10–20 minute wear

Net weight: 10 sheets, 25 g each

Yuja Niacin 30 Days Care Serum Mask

10ea ·€28.88

Moisture-focused care

Care for visible dullness

10 portioned masks

10–20 minute wear

Main active: Niacinamide
Intensity: Standard

PRODUCT DETAILS

Learn more

GOES WELL WITH

100 VITA-LIGHT Reedle Shot€9.00

1025 Dokdo Eye Cream€20.88

1025 Dokdo Sun Cream€17.98

100 Collagen Reedle Shot Stick Pouch€8.88

100 PRO CICA Reedle Shot Stick Pouches€9.00

100 Reedle Shot Stick Pouch€7.88

100 RETI-A Reedle Shot€9.00

1025 Dokdo Cleanser€10.99

Moisture and visible radiance are the focus, supported by the yuja blend, vitamins and moisture-minded ingredients.

Moisture-focused care
Care for visible dullness