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KBeauty Verified™ — K-beauty checked against official records from Korea, the EU and the U.S.
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By Wishtrend Mandelic Acid Spot Clearing Patch

Mask

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Check against official records

KR South Korea (MFDS)

1 ingredient with Korea limits or conditions.

Zinc PCA
EU European Union (CosIng)

1 ingredient with EU limits or conditions.

Zinc PCA
US United States (FDA)

No prohibited or restricted ingredients found in U.S. records.

#Ingredient (as listed)KR KoreaEU EUUS U.S.
1 Polyisobutene ———
2 Cellulose Gum ———
3 Mandelic Acid ———
4 Water (Aqua) ———
5 Niacinamide ———
6 Zinc PCA Restricted Restricted · (a) 1% · (b) 0,72% ·… —
7 Butylene Glycol ———
8 1,2-Hexanediol ———
9 Centella Asiaica Extract ———
10 Salix Alba (Willow) Bark Extract ———
11 Madecassoside ———

“—” means no specific record for that ingredient in that jurisdiction's lists — it is not an approval. Restricted ingredients are allowed within limits (concentration, product type, label warnings); a product listing one is not necessarily over the limit. How we check.

Ingredient list from By Wishtrend official store, retrieved Oct 17, 2026. Formulas change — check the label on the package you buy.

Fragrance allergens (EU labelling)

None of the fragrance allergens the EU requires to be labelled appear in this ingredient list.

Source: EU Cosmetics Regulation Annex III as amended by Regulation (EU) 2023/1545 — the list grew from 26 to over 80 entries; it applies to new products from 31 July 2026 and to all products from 31 July 2028. Shown for information; it is not a sign that a product is unsafe.

Storage & heat

Official storage statements

“Keep out of direct sunlight. Keep out of reach of children.” — Common precautions required on all cosmetics in Korea (Cosmetics Act Enforcement Rule, Annex 3)

On the brand's product page

“Store in a cool, dry place away from sunlight.”

Our note — heat, light & air

No ingredients on our heat/light/air list. Even so, cosmetics last longest closed, cool and out of direct sun.

Other markets

Ingredients in this formula that are prohibited or limited in other markets, from the overseas regulation database compiled by Korea's MFDS. Limited means allowed within conditions.

MarketProhibitedLimited
CN China None found Zinc PCA
AS ASEAN (10 countries) None found Zinc PCA
JP Japan None found —
TW Taiwan None found Mandelic Acid
CA Canada None found Mandelic Acid
BR Brazil None found Zinc PCA
AR Argentina None found Zinc PCA

Similar ingredient lists

Products from other brands whose ingredient lists overlap most with this one. The score weighs the first ingredients most (labels list them roughly by amount), skips ingredients found in most products, and counts UV filters and less common ingredients more. Similar ingredient lists (not a test of how they work) — amounts, texture and results can differ.

JMsolution Skin Boost Niacinamide 15% Serum 1.0 (30ml) Toner
31% similar · Shares 5 of this product's first 11 ingredients, including Zinc PCA and Niacinamide.
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0 2 0 0 0 0 0 2
COSRX Low pH Niacinamide Micellar Cleansing Water Cleanser · $9.99
28% similar · Shares 3 of this product's first 11 ingredients, including Zinc PCA and Niacinamide.
Compare side by side →
0 2 2 0 0 0 0 5
COSRX The Niacinamide 15 Serum Serum · $25.00
27% similar · Shares 5 of this product's first 11 ingredients, including Zinc PCA and Niacinamide.
Compare side by side →
0 2 1 0 0 0 0 4
Aestura A-CICA365 Soothing Repair Mask 5ea Mask
27% similar · Shares 6 of this product's first 11 ingredients, including Zinc PCA, Niacinamide and Madecassoside.
Compare side by side →
0 0 0 0 0 0 0 0
COSRX The AHA 2 BHA 2 Blemish Treatment Serum Serum · $23.00
26% similar · Shares 3 of this product's first 11 ingredients, including Zinc PCA.
Compare side by side →
0 2 1 0 0 0 0 4
Dr.Melaxin TX Astaxanthin Dark Spot Care Hydrogel Mask 4EA Mask · $11.40
25% similar · Shares 5 of this product's first 11 ingredients, including Zinc PCA and Niacinamide.
Compare side by side →
0 1 0 0 0 0 0 1

Based on the listed ingredients only; recalculated weekly. Not a judgment of which product is better, safer or the same.

Compare with

By Wishtrend vs By WishtrendMandelic Acid Spot Clearing Patch vs Mandelic Acid Dark Spot Correcting SerumBy Wishtrend vs By WishtrendMandelic Acid Spot Clearing Patch vs Sulfur 3% Clean GelBy Wishtrend vs By WishtrendMandelic Acid Spot Clearing Patch vs Propolis Energy Boosting EssenceBy Wishtrend vs By WishtrendMandelic Acid Spot Clearing Patch vs Green Tea (Matcha) & Enzyme Milky Foaming WashBy Wishtrend vs By WishtrendMandelic Acid Spot Clearing Patch vs Propolis Energy Calming AmpouleBy Wishtrend vs By WishtrendMandelic Acid Spot Clearing Patch vs Vitamin A-mazing Bakuchiol Night Cream 10g

Information only, not medical advice. If you are pregnant, have a skin condition or allergies, ask a dermatologist or pharmacist before use.

Frequently asked questions

Is By Wishtrend Mandelic Acid Spot Clearing Patch allowed in the European Union?

We found no prohibited ingredients. 1 ingredient has limits or conditions in the EU's CosIng records (Zinc PCA). That usually means a maximum amount, a product type or a label warning — not a ban.

Is By Wishtrend Mandelic Acid Spot Clearing Patch allowed in South Korea?

We found no prohibited ingredients. 1 ingredient has limits or conditions in Korea's MFDS records (Zinc PCA). That usually means a maximum amount, a product type or a label warning — not a ban.

Is By Wishtrend Mandelic Acid Spot Clearing Patch allowed in the United States?

We found no prohibited or restricted ingredients in the FDA's records for its listed ingredients. This is a records check, not an approval.

Does By Wishtrend Mandelic Acid Spot Clearing Patch contain fragrance allergens?

None of the fragrance allergens the EU requires to be labelled appear in its ingredient list.

What are the main ingredients in By Wishtrend Mandelic Acid Spot Clearing Patch?

Ingredient lists are in descending order of amount down to about 1%. The first five listed are: Polyisobutene, Cellulose Gum, Mandelic Acid, Water (Aqua), Niacinamide. In total 11 ingredients are listed.

Where does this ingredient list come from?

From By Wishtrend official store on October 17, 2026. We re-read it every week and keep earlier versions if the formula changes.

Ask KBeauty Verified™
KBeauty Verified™ — K-beauty checked against official records from Korea, the EU and the U.S.
Reading time:
Views: 0
Claude: 1 ChatGPT: 0 Google · Gemini: 0 Perplexity: 0 Meta AI: 0 Amazon: 0 Others: 0
Read by AI & crawlers
Claude1
ChatGPT0
Google · Gemini0
Perplexity0
Meta AI0
Amazon0
Others0

Named by what the crawler says it is; look-alikes we detect are counted under Others. Google · Gemini includes Googlebot, Google’s search crawler, whose index Google also uses for its AI features; other search engines and bots are in Others. AI visibility →