[NEWS] Mild on skin, proven in clinical tests: the mandelic acid toner and its line

Product at a glance: Mandelic Acid Gentle Exfoliating Toner · 150 mL · 97.5% of lifted dead skin cells removed after 1 use (clinical test) · 4.6★ from 1,880 YesStyle reviews

In this brief

1. Exfoliation is back, at a slower pace
2. A 5% mandelic acid toner, mild enough for daily use
3. Mild on skin, with results shoppers can see
4. What the clinical tests show
5. Mild, proven and already reviewed
6. One toner opens the line
7. The U.S., Vietnam and the Nordics
8. Sell it as the acid that is mild and works
9. What buyers usually ask about this toner

01 · Why now

Exfoliation is back, at a slower pace

Who What Wear lists gentle exfoliation first among the skincare trends that will define 2026. After years of over-exfoliation and damaged barriers, it reports, shoppers are returning to acids in milder forms, with enzymes, PHAs and large-molecule acids replacing strong AHAs and scrubs. Esthetician Sofie Pavitt called mandelic acid "my favorite low and slow daily exfoliator."[1]

Dermatologists are making the same case to a wider audience. In a July 2026 Real Simple article, Yale dermatologist Mona Gohara described mandelic acid as glycolic acid's gentler cousin: "If glycolic acid is sprinting, mandelic acid is taking a brisk walk." She named sensitive skin, rosacea-prone skin and deeper skin tones prone to post-inflammatory marks as the best fit.[2] Harper's Bazaar India called it "the slow beauty acid" in its February 2026 print edition.[3]

02 · What it is

A 5% mandelic acid toner, mild enough for daily use

The By Wishtrend Mandelic Acid Gentle Exfoliating Toner is a daily exfoliating toner with 5% mandelic acid, an AHA from almonds. It was first sold as the Mandelic Acid 5% Skin Prep Water and now comes in a 150 mL bottle, with the same formula.[4]

• Active: 5% mandelic acid, an AHA[4]
• Supporting ingredients: Panthenol, beta-glucan, licorice root, houttuynia cordata, centella[5]
• Size: 150 mL; 30 mL mini[4]
• Free of: Artificial coloring, artificial fragrance, animal-derived ingredients[5]
• Use: Pat in by hand daily, or sweep with a cotton pad for stronger exfoliation[5]
• Former name: Mandelic Acid 5% Skin Prep Water, 120 mL[4]
• Tested: Non-comedogenic tested and sensitive-skin safe tested[4]

03 · Market position

Mild on skin, with results shoppers can see

Exfoliants usually ask shoppers to choose: strong acids that work fast, or soft formulas that do little. Mandelic acid is a larger AHA that enters the skin slowly.[1][2] The By Wishtrend toner uses it to hold the position in between: mild enough for daily use, with clinical results to show.

04 · Clinical results

What the clinical tests show

• Dead skin. 97.5% of lifted dead skin cells removed after one use; built-up dead skin cells down 73.4% after one week.[6]
• Oil and pores. Excess sebum production down 41.7% and pore-deep sebum down 19.8% after four weeks.[6]
• Calm skin. Skin redness from external damage down 78.4% after one use; damaged skin area improved 18.9% after four weeks.[6]
• Marks and turnover. Post-breakout dark spots faded 38.8% after two weeks; skin turnover improved 56.8% after one week.[6]

Tests by P&K Skin Research Center, January to February 2025, with 20 to 22 subjects aged 16 to 59, as published by By Wishtrend.[6]

05 · Why stock it

Mild, proven and already reviewed

• Reviewed by shoppers. 4.6 stars from 1,880 YesStyle reviews and 4.6 stars from 715 Amazon U.S. ratings, with 400+ bought in the past month.[7][6]
• Recommended by experts. Kelly Driscoll suggests it for sensitive, breakout-prone skin because mandelic acid enters the skin more slowly; medical esthetician Cassandra Bankson puts it in her "worth the money" group.[8][9]
• Viral demand. A Vietnamese TikTok telling viewers with acne to use mandelic acid, with the toner in hand, passed 1.1 million views.[10]
• A line to sell with it. The Dark Spot Glow Serum and Calming Care Patch use the same mandelic acid story, so one shelf card sells three products.[11][12]

06 · The mandelic acid line

One toner opens the line

Ratings: YesStyle, checked 7 Oct. 2026.

07 · Where it sells

The U.S., Vietnam and the Nordics

• United States. Sold on the Wishtrend U.S. store, Amazon (4.6★, 715 ratings) and listed on Target.com.[4][6][13]
• Vietnam. One creator video recommending it for acne passed 1.1 million views.[10]
• Nordics. Swedish retailer Lyko shows a 4.7 rating from 36 customer reviews.[14]

08 · How to merchandise it

Sell it as the acid that is mild and works

• Lead with the proof. A shelf card that reads "97.5% of dead skin lifted after 1 use" gives the shopper a reason to choose it.
• Offer the 30 mL mini. It lets first-time acid users start small.[4]
• Sell the line. Place the toner, Dark Spot Glow Serum and Calming Care Patch together as one clear-skin routine.
• Print the usage rule. Start about three times a week and add sunscreen in the morning.[5]

09 · Buyer questions

What buyers usually ask about this toner

• Is the Skin Prep Water the same product? Yes. The brand states the formula and ingredients are unchanged; the name, bottle and size changed.[4]
• What do the clinical tests show? 97.5% of lifted dead skin removed after one use, 41.7% less excess sebum after four weeks and 38.8% lighter post-breakout marks after two weeks.[6]
• Who is it for? Oily, breakout-prone and sensitive skin; it is non-comedogenic tested and sensitive-skin safe tested.[4]
• How is it used? After cleansing, by hand or with a cotton pad, about three times a week to start.[5]
• What about wholesale price, stock and lead time? Those are shared after account approval through WishTrade.

09 · Videos

12 creator videos on the mandelic toner

13 videos · 8 YouTube, 5 TikTok · 10 Skin Prep Water, 3 new Gentle Exfoliating Toner

Every video here shows the By Wishtrend mandelic toner on screen. Most show the earlier Skin Prep Water bottle, which has the same formula. Cards are ordered by views on each platform. One official brand video is included and marked.

Partner with WishTrade

What partners get when they stock it

Stock the gentle acid that proves it

For the brand case, read 7 Reasons Your K-Beauty Shop Must Stock By Wishtrend. View the Mandelic Acid Gentle Exfoliating Toner on WishTrade. Request a wholesale account and your account manager will share pricing, stock and ordering terms.

Request a wholesale account