Isntree Chestnut BHA 0.9% Clear Toner for combination skin

How to apply

Questions and answers

What the research says

• A botanical face cleanser with hops and willow bark extract continuously reduced skin sebum levels without reactive seborrhea after treatment in 21 healthy volunteers compared to a sodium laureth sulfate cleanser, with neither cleanser causing skin irritation.

  Journal of Cosmetic Dermatology, 2019

• Topical dexpanthenol acts as a moisturizer, improves stratum corneum hydration, accelerates wound healing and epidermal regeneration, reduces erythema, and improves symptoms of skin irritation compared to vehicle or no pretreatment.

  American Journal of Clinical Dermatology, 2002

• A new topical panthenol-containing emollient significantly improved transepidermal water loss reduction, stratum corneum hydration, and intercellular lipid lamellae length compared with control in healthy subjects without negatively impacting bacterial viability.

  The Journal of Dermatological Treatment, 2017

• A panthenol-enriched mask significantly decreased erythema and hyperpigmentation, increased sebum and stratum corneum moisture, and reduced transepidermal water loss compared to a saline dressing in 60 subjects undergoing facial laser treatment.

  Journal of Cosmetic Dermatology, 2025

• Cosmetic formulations containing 5% Centella asiatica extract showed the best efficacy in improving skin moisture and decreasing transepidermal water loss, while also exhibiting antiinflammatory properties in 25 volunteers compared to baseline measurements.

  Indian Journal of Pharmaceutical Sciences, 2016

• Cryotherapy with liquid nitrogen achieved a higher cure rate (39%) than salicylic acid (24%) and a wait-and-see approach (16%) for cutaneous warts at 13 weeks in primary care patients.

  CMAJ, 2010

• A moisturizer containing licochalcone A, 1,2-decanediol, L-carnitine, and salicylic acid significantly reduced noninflammatory, inflammatory, and total acne lesion counts compared to a vehicle control in Thai patients during a 12-week maintenance phase.

  BioMed Research International, 2020

• Treatment with 2% supramolecular salicylic acid hydrogel resulted in a regression and markedly improvement rate of 51.01% compared to 43.10% for Adapaline gel in patients with mild to moderate facial acne vulgaris, showing no significant difference in efficacy.

  Journal of Cosmetic Dermatology, 2024

• Topical application of a cosmetic cleanser containing Diospyros kaki folium, Polygonum cuspidatum, and Castanea crenata var. dulcis extracts reduced skin oil content by 77.3%, pore number by 24.83%, and pore size by 71.43% in healthy volunteers compared to a control cleanser.

  Biomedical Reports, 2015

• A Castanea sativa spiny burs extract-loaded topical emulsion improved skin hydration, skin elasticity, and reduced periorbital wrinkles in 30 days in healthy human volunteers compared to placebo without altering skin barrier function, sebum, pH, or erythema.

  Pharmaceutics, 2021

• An antioxidant surfactant-free topical formulation containing Castanea sativa leaf extract demonstrated stable physical and microbiological properties, a release rate of 610 ± 70 µgh(-0.5), and a significant in vivo moisturizing effect lasting at least 4 hours.

  Drug Development and Industrial Pharmacy, 2015

• Topical application of 0.1% hyaluronic acid formulations of different molecular weights led to significant improvements in skin hydration and elasticity, with low-molecular-weight formulations also significantly reducing wrinkle depth in seventy-six female subjects compared to a vehicle control.

  Journal of Drugs in Dermatology, 2011

• Topical application of hyaluronic acid in conjunction with free gingival graft significantly reduced donor site postoperative pain until day 7 compared to normal saline, with no significant differences in graft dimensions or patient satisfaction.

  Clinical Oral Investigations, 2022

• Treatment with a hyaluronic acid-containing mouth rinse or topical gel led to significant lesion reduction, pain relief, and normalization of lesion color in adult patients with minor recurrent aphthous stomatitis, with the gel formulation showing an earlier healing onset at 3 days.

  BMC Oral Health, 2019

• A single application of a moisturizing fluid containing hyaluronic acid 1%, glycerin 5%, and Centella asiatica stem cells extract significantly increased skin hydration by 29% and reduced transepidermal water loss at 24 hours compared to baseline and an untreated control site in twenty healthy women.

  Clinical, Cosmetic and Investigational Dermatology, 2017

• The emollient V0034CR significantly reduced TEWL compared to vehicle and vehicle plus glycerol, and significantly increased corneometry scores compared to vehicle and vehicle plus petrolatum in healthy volunteers with dry skin, demonstrating combined barrier function improvement from petrolatum and hydration improvement from glycerol.

  Journal of Cosmetic Dermatology, 2020

• Ten days of treatment with a cream containing 20% glycerin significantly increased skin hydration measured by corneometer values in 17 healthy volunteers compared to a placebo cream, but showed no influence on transepidermal water loss or skin sensitivity to an irritating surfactant.

  International Journal of Cosmetic Science, 2001

• Moisturizer containing 5% panthenol, madecassoside, and copper-zinc-manganese decreased adverse reactions and downtime after ablative fractional carbon dioxide laser resurfacing with comparable efficacy to 0.02% triamcinolone acetonide cream in 20 subjects.

  Journal of Cosmetic Dermatology, 2019

• Topical dexpanthenol formulated in lipophilic vehicles improved stratum corneum hydration and reduced transepidermal water loss compared to vehicle control in humans.

  Arzneimittel-Forschung, 2000

• Hyaluronic acid, hyaluronic acid plus dexpanthenol, and isotonic saline nasal sprays all significantly improved dry nose symptoms over four weeks in 240 patients, with hyaluronic acid plus dexpanthenol providing superior nasal moisturisation compared to the other two.

  Auris, Nasus, Larynx, 2020

Ingredients

Water, Butylene Glycol, Glycerin, Panthenol, Sodium Hyaluronate, Portulaca Oleracea Extract, Xanthan Gum, Betaine Salicylate, Glycyrrhiza Glabra Extract, Trehalose, Allantoin, Betaine, Hizikia Fusiforme Extract, Borago Officinalis Extract, Willow Bark Extract, Salvia Sclarea Extract, Ethylhexylglycerin, Centaurea Cyanus Flower Extract, Aloe Barbadensis Leaf Juice Powder, Soy Isoflavones, Chestnut, Amt 100, Chamomilla Recutita Flower Extract, 1,2-Hexanediol, Codium Fragile Extract, Hyacinthus Orientalis Extract, Centella Asiatica Extract, Chamomilla Recutita Flower Extract Matricaria Flower Extract, Lavandula Angustifolia Flower Extract Lavender Flower Extract, Disodium Edta, Dipotassium Glycyrrhizate, Sodium Hydroxide, Tromethamine

Behind this fit score

Lovi calculates every fit score from the full ingredient list with brand-independent rules our dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update.