Quad Active Boosting Essence

The first treatment essence is one of those K-beauty inventions that the rest of the world spent thirty years catching up to. SK-II popularized the format in the 1980s with Facial Treatment Essence — a single galactomyces ferment delivered as the watery first step of a routine — and the category has been quietly dominating East Asian skincare ever since. The problem is that most of the imitators that followed never matched the original. They put 'first essence' on the front of a bottle of glycerin water with a token ferment, and they trusted the consumer not to read the ingredient list. By Wishtrend's Quad Active Boosting Essence is the unusual case where a brand looked at the SK-II concept, decided to compete on a different axis entirely, and built a formula whose front-of-bottle claim matches the INCI math.

The 'quad' in the name is literal. Willow bark extract at 10% sits in the second ingredient slot, just after water. Cornflower flower water at 9%. Schisandra fruit extract at 9%. Mulberry bark extract at 8.7%. Lotus leaf extract at 8.7%. Add those up and you get roughly 45% of the formula in named botanical actives, which is unheard of in this category. Cornflower flower water is replacing the equivalent fraction of plain water as the carrier, and the essence picks up additional botanical hydration and a soothing flavonoid layer in the process. By the time you get past the methylpropanediol and glycerin in slot seven and eight, you have already worked through five named actives in honest concentrations. Below that, two postbiotic ferments — saccharomyces-honey and saccharomyces-xylinum-black tea — add the microbiome and amino-acid layer. A small dose of propolis at 1% rounds out the back half. Citric acid and sodium citrate buffer the pH to around 5.0 — close to the skin's natural surface acidity, which is the right choice for a first-step product.

What does the ingredient density actually do on the face? It does what a first essence is supposed to do, which is provide immediate hydration and prep the skin for what comes next. The texture is exactly right for the job: watery, slippery, with the slight slip of a good hydrating toner, absorbing in under ten seconds with no tackiness or residue. Pat it on damp skin straight after cleansing and the next product layers on noticeably more cleanly. After a few days of use, the skin tends to feel slightly plumper and smoother, and the routine as a whole feels more cohesive — the kind of subtle, structural improvement that you only notice when you skip the step for a week and the routine starts feeling slightly less polished.

The willow bark deserves its own paragraph because the marketing tends to oversell it. Willow bark contains salicin, which is the natural precursor to salicylic acid, and a lot of K-beauty marketing implies that 'natural BHA' essences are equivalent to a 0.5% salicylic acid product. They are not. Salicin converts only partially in topical use, and the real benefit of willow bark in this essence is its own polyphenol fraction and gentle anti-inflammatory action rather than BHA-strength exfoliation. If you are looking for an exfoliating essence, this is not the right tool — try the brand's mandelic acid prep water instead. If you are looking for a soothing, hydration-and-prep essence with an interesting botanical stack, this is one of the better options in the category.

The other botanicals are where the formulation gets quietly interesting. Schisandra is an adaptogenic berry with documented antioxidant and mild astringent properties. Cornflower water has been used in European herbalism for centuries to calm sensitive skin and the eye area. Mulberry bark is the source of mulberroside-A and other tyrosinase-inhibiting flavonoids, which gives this essence a modest brightening dimension that compounds with whatever vitamin C or niacinamide you layer over the top. Lotus leaf contributes its own polyphenol-and-flavonoid load. Black tea ferment, in addition to its postbiotic role, is itself a source of catechins. The whole thing is a stacking exercise in plant polyphenols, and the cumulative effect on skin tone over four to six weeks of daily use is more noticeable than any individual ingredient would suggest.

The limitations are honest and small. The effects are subtle on their own — this is a prep step, not a treatment, and users expecting dramatic before-and-after photos will be disappointed. The faint herbal smell from the botanical extracts won't bother most people, but a small percentage notice it. The 100ml glass bottle is heavier than the equivalent plastic packaging, which matters mostly if you are traveling. And the propolis and honey ferment content disqualifies this essence for vegan shoppers and for users with bee-product allergies.

For combination, normal, sensitive and oily skin chasing a genuinely-active first step that doesn't cost SK-II money, this is one of the better-formulated essences on the K-beauty market. It is not the flashiest product in this batch and it will not make a dramatic claim on its own, but it is the kind of structural, behind-the-scenes step that makes the rest of a routine work better. Within its category, it is one of the few essences that earns the price tag through actual ingredient density.

Formula

The hero actives that drive this product's performance.

Ingredient	Function	Evidence
Willow Bark Extract 10% (10%)	Natural source of salicin, the precursor to salicylic acid, providing very gentle BHA-adjacent exfoliation and anti-inflammatory action without the harshness of synthetic salicylic acid. At 10% it sits at the top of the formula, well above the trace amounts most willow-bark essences use as a marketing flag.	promising
Cornflower (Centaurea Cyanus) Flower Water 9% (9%)	Replaces water for nearly a tenth of the formula, contributing flavonoids and a soothing, anti-inflammatory profile that has long been used in European herbalism for sensitive skin and the eye area. The 9% load is what makes this essence read as calming despite the willow bark.	emerging
Schisandra Chinensis Fruit Extract 9% (9%)	Adaptogenic berry with documented antioxidant and mild astringent properties. In this essence it contributes to the polyphenol load alongside the willow bark and the other botanicals, supporting the brand's quad-active anti-pollution positioning.	emerging
Mulberry & Lotus Leaf Extracts (~17.4% combined)	Mulberry bark contributes mulberroside-A and other tyrosinase-inhibitor flavonoids that give this essence a modest brightening dimension. Lotus leaf adds anti-inflammatory and antioxidant phenolics. Together they account for nearly 18% of the formula and are the 'quad' in the product name.	promising
Saccharomyces/Black Tea & Honey Ferments	Postbiotic ferments that contribute mild peptide and amino-acid hydration plus microbiome support. The black tea ferment is also a polyphenol contributor in its own right, complementing the botanical stack.	emerging

Full INCI List · pH 5

Aqua (Water), Salix Alba (Willow) Bark Extract (10%), Centaurea Cyanus Flower Water (9%), Schisandra Chinensis Fruit Extract (9%), Morus Alba Bark Extract (8.7%), Nelumbo Nucifera Leaf Extract (8.7%), Methylpropanediol, Glycerin, Saccharomyces/Honey Ferment Filtrate, Saccharomyces/Xylinum/Black Tea Ferment, 1,2-Hexanediol, Propolis Extract (1%), Butylene Glycol, Benzyl Glycol, Hydroxyethylcellulose, Citric Acid, Sodium Citrate, Disodium EDTA, Ethylhexylglycerin

Product Flags

✓ Fragrance Free✓ Alcohol Free✓ Oil Free✓ Silicone Free✓ Paraben Free✓ Sulfate Free✓ Cruelty Free✗ Vegan✓ Fungal Acne Safe

Common Allergens

honey fermentpropolis

Compatibility

Best For

combination oily normal sensitive

Works For

dry

Not Ideal For

Addresses These Conditions

dullness dehydration sensitivity compromised skin barrier acne

Routine Step

toner

Time of Day

AM & PM

Pregnancy Safe

Yes ✓

Layering Tips

Apply as the first product after cleansing, on damp skin if possible. Pat into the face and neck, then layer toners, ampoules, serums and moisturizer normally.

Results Timeline

Smoother, plumper-feeling skin within the first few days. Subtle brightening and improved tone evenness over 4-6 weeks of consistent twice-daily use.

Pairs Well With

niacinamidevitamin-cpropolis-ampoulecentella-serums

Sample AM Routine

1. Gentle Cleanser
2. By Wishtrend Quad Active Boosting Essence
3. Vitamin C Serum
4. Moisturizer
5. Sunscreen

Sample PM Routine

1. Cleanser
2. By Wishtrend Quad Active Boosting Essence
3. Treatment
4. Moisturizer

Evidence

The Science

First treatment essences as a category have less direct clinical literature than treatment serums, but the individual botanical actives in this formula have their own evidence bases. Salix alba (willow) bark contains salicin, which is metabolized to salicylic acid only partially in topical application — research published in the International Journal of Cosmetic Science has examined topical salicin and noted that its anti-inflammatory and antioxidant effects come more from its own polyphenol fraction than from significant conversion to salicylic acid. The 10% willow bark concentration in this essence is well above typical cosmetic levels, putting it in a range where the polyphenol payload is meaningful. Centaurea cyanus (cornflower) water has a long European herbalism history for sensitive skin applications, and modern phytochemistry has identified flavonoids, anthocyanins and tannins in the extract that have mild anti-inflammatory and astringent activity. Schisandra chinensis is an adaptogenic berry with documented antioxidant activity in topical models — a 2018 study in the International Journal of Molecular Sciences examined schisandra extract effects on UV-induced oxidative stress in keratinocyte models and found measurable protection. Morus alba (mulberry) bark contains mulberroside-A and oxyresveratrol, both of which are tyrosinase inhibitors with documented activity in pigmentation models, providing the brightening dimension of this essence. Nelumbo nucifera (lotus) leaf contributes flavonoids and alkaloids with anti-inflammatory and antioxidant activity. The combination of postbiotic ferments — saccharomyces-honey and saccharomyces-xylinum-black tea — adds amino acids, peptides and additional polyphenols to the formula. The propolis at 1% sits at a lower concentration than the brand's treatment ampoules but contributes its own polyphenol fraction. The combination is the formulation logic: rather than relying on a single high-concentration hero, this essence stacks five botanical actives and two ferments, all at meaningful concentrations, to create cumulative anti-inflammatory, antioxidant and mild brightening effects that emerge over weeks of consistent use.

References

1. Antioxidant and anti-inflammatory effects of botanical extracts in topical formulations — International Journal of Cosmetic Science (2019)

Dermatologist Perspective

Dermatologists generally view first treatment essences as supportive rather than essential — they are not a category with the depth of clinical literature that retinoids or hydroxy acids have, and the dermatological view is typically that a well-formulated essence is a pleasant addition to a routine but not a substitute for evidence-based treatment. That said, board-certified dermatologists frequently note that polyphenol-rich botanical formulas can have meaningful supportive effects on sensitive, reactive and pigmentation-prone skin, and the willow bark and mulberry bark in this formula have legitimate evidence for anti-inflammatory and tyrosinase-inhibiting activity. The fragrance-free, alcohol-free formulation is consistent with what dermatologists typically recommend for sensitive skin. The product is generally considered appropriate for use during pregnancy.

Guidance

How to Use

Apply as the first product after cleansing, on damp skin if possible. Pour a small amount into your palms and pat into the face and neck rather than wiping with a cotton pad — patting maximizes absorption and minimizes waste. Wait 15-30 seconds, then layer toners, ampoules, serums and moisturizer normally. Use morning and evening for best results. Pairs particularly well with the brand's vitamin C serum (AM) and propolis ampoule (both AM and PM).

Value Assessment

At around twenty-three dollars for 100ml, this is one of the better-value first essences in the K-beauty category. SK-II Facial Treatment Essence runs five to six times the price for the same volume, and most mid-range Korean essences are similarly priced or more expensive at smaller sizes. The 100ml bottle lasts three to four months with twice-daily use, which puts the per-month cost in basic-toner territory. The price is justified by the ingredient density — five named botanical actives at honest percentages plus two postbiotic ferments — which is genuinely unusual at this price point. Cheaper essences exist, but most run on a single hero ferment in a glycerin base. This is the version worth paying for if you want the polyphenol stack approach.

Who Should Buy

Combination, normal, sensitive and oily skin looking for a genuinely-active first essence step. Users who want the polyphenol-stack approach instead of a single-hero ferment essence. Anyone disappointed by the empty-vehicle first essences that dominate the lower end of the category.

Who Should Skip

Users who don't want to add a first essence step to their routine. People with confirmed propolis or bee-product allergies. Vegan shoppers avoiding bee-derived ingredients.

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Details

Texture

Thin, watery essence with the slip of a hydrating toner; absorbs in seconds.

Scent

Faint, slightly herbal natural smell from the botanical extracts; no added fragrance.

Packaging

Tinted orange-amber glass bottle with screw cap; the tint helps protect the polyphenol botanicals from light.

Finish

lightweightfast-absorbinginvisible

What to Expect on First Use

Quietly uneventful — no sting, no purging, no obvious sensation beyond a faint hydrating feel. Most users notice better product layering and slightly smoother skin within the first week, with subtle tone improvements over a month of consistent use.

How Long It Lasts

100ml lasts about 3-4 months with twice-daily use applied with hands.

Period After Opening

12 months

Best Season

All Year

Certifications

cruelty-free

Background

By Wishtrend developed the Quad Active Boosting Essence in 2020 as a deliberate alternative to single-ingredient first essences like SK-II Facial Treatment Essence. The 'quad' framing was an honest reference to the four named botanical actives and the brand's interest in stacking polyphenols rather than relying on a single hero.

About By Wishtrend Established Brand (5–20 years)

By Wishtrend launched in 2013 as Korean retailer Wishtrend's in-house brand. The Quad Active Boosting Essence is the brand's first-step prep essence, built around a quad of botanical actives at honest concentrations.

Brand founded: 2013 · Product launched: 2020

Myth vs. Reality

Myth

First essences are an unnecessary K-beauty step.

Reality

A well-formulated first essence does measurably improve subsequent product absorption and provides its own hydration and active payload. The argument against them applies only to the empty-vehicle versions that dominate the lower end of the category.

Myth

Willow bark at 10% is the same as salicylic acid at 0.5%.

Reality

Willow bark contains salicin, which is a precursor to salicylic acid but converts only partially in topical use. The real activity here is the willow bark's own polyphenol fraction and gentle anti-inflammatory effects, not BHA-strength exfoliation.

FAQ

Common Praise

"actually preps skin for what comes next"

"non-sticky watery texture"

"no fragrance, no sting"

"100ml lasts a long time"

"fungal acne safe"

Common Complaints

"faint herbal smell"

"subtle effects on its own"

"not exfoliating despite the willow bark"

Notable Endorsements

r/AsianBeautyK-beauty review community

Appears In

best first treatment essence best k beauty essence best essence for sensitive skin best polyphenol essence best essence for dullness

Related Conditions

dullness dehydration sensitivity

Related Ingredients

willow bark schisandra polyphenols ferments