A gentle synthetic ingredient that helps calm irritated skin and reduce redness, ideal for sensitive or reactive skin types.
Irritation
low
Source
synthetic
Beauty ingredient research
Browse the review database to understand what an ingredient is, what it does in a beauty formula, when it is useful, and when it deserves caution across skincare, haircare, bodycare, makeup, and more.
20769
Reviewed ingredients
524
Low-concern standouts
2884
Need usage caution
A gentle synthetic ingredient that helps calm irritated skin and reduce redness, ideal for sensitive or reactive skin types.
Irritation
low
Source
synthetic
A gentle, aromatic water that may offer mild soothing and refreshing benefits, but its effects are largely due to its pleasant scent and water content.
Irritation
low
Source
natural
A gentle plant extract with traditional use for soothing skin, but scientific backing is still limited.
Irritation
low
Source
natural
Soothing Agent
Bacillus/Coix Lacryma-Jobi Ma-Yuen Seed/Soybean Ferment Filtrate
A gentle fermented extract that may help calm irritation and support skin hydration, though research is still early.
Irritation
low
Source
biotech
A gentle, fermented aloe ingredient that boosts hydration and soothes skin with enhanced bioavailability.
Irritation
low
Source
biotech
Soothing agent
Aspergillus/Saccharomyces/Barley Seed Ferment Filtrate Extract
A fermented barley extract that may help calm skin and provide antioxidant support, though research is still emerging.
Irritation
low
Source
biotech
Soothing agent
LACTOBACILLUS/ACORUS CALAMUS ROOT EXTRACT FERMENT FILTRATE
A fermented botanical ingredient that may help calm skin and support a balanced skin microbiome, though research is still emerging.
Irritation
low
Source
biotech
A fermented Centella extract that may offer enhanced soothing and antioxidant benefits with low irritation potential.
Irritation
low
Source
biotech
Soothing Agent
Aspergillus/Saccharomyces/Chicory Root Ferment Lees Extract
A gentle, fermented ingredient that may help calm skin and support a balanced microbiome, though research is still emerging.
Irritation
low
Source
biotech
Soothing Agent
ASPERGILLUS/CENTELLA ASIATICA LEAF/STEM EXTRACT/SWIFTLET NEST EXTRACT FERMENT FILTRATE
A fermented blend that combines centella asiatica's soothing properties with swiftlet nest's hydrating amino acids, but research is limited.
Irritation
low
Source
mixed
Soothing Agent
LACTOBACILLUS/SACCHAROMYCES/COPTIDIS RHIZOME FERMENT FILTRATE
A fermented botanical ingredient that may help calm skin and provide antioxidant benefits, though research is still emerging.
Irritation
low
Source
biotech
Soothing agent
Capryl Escherichia coli/Corn Kernel Extract/Glucose Ferment Filtrate
A biotech ferment that may help calm skin and support the barrier, but research is still early and the ingredient is uncommon in consumer products.
Irritation
low
Source
biotech
Soothing agent
LACTOBACILLUS/DENDROPANAX MORBIFERUS SAP FERMENT FILTRATE
A fermented sap extract that may offer soothing and conditioning benefits, but research is still limited.
Irritation
low
Source
biotech
Soothing agent
Bacillus/Spirodela Polyrhiza Extract/Volcanic Ash Extract Ferment Filtrate
A gentle, fermented botanical-mineral blend that may help calm skin and provide antioxidant support, though research is still emerging.
Irritation
low
Source
biotech
Soothing agent
KLUYVEROMYCES/LACTOBACILLUS/EVENING PRIMROSE FLOWER OIL FERMENT FILTRATE
A gentle, fermented oil ingredient that may help soothe and nourish the skin, but research is still emerging.
Irritation
low
Source
biotech
A gentle, fermented botanical extract that may help calm redness and support skin's natural defenses, though research is still early.
Irritation
low
Source
biotech
Soothing Agent
Bifidobacterium/Lactobacillus/Streptococcus/Panax Notoginseng Rhizome/Root Extract Ferment Filtrate
A fermented blend of Panax notoginseng and probiotics that may help calm skin and provide antioxidant benefits, though research is still emerging.
Irritation
low
Source
mixed
Soothing Agent
SACCHAROMYCES/LITHOSPERMUM ERYTHRORHIZON ROOT OIL FERMENT FILTRATE
A fermented botanical oil that may help calm irritation and provide antioxidant protection, though research is still emerging.
Irritation
low
Source
biotech
Soothing agent
Saccharomyces/Honey/Vinegar/Wine/Withania Somnifera Root Ferment Filtrate
A fermented blend that may help calm skin and support a healthy barrier, but research is limited to ingredient-level studies.
Irritation
low
Source
biotech
Soothing Agent
Bacillus/Houttuynia Cordata Leaf/Soybean Ferment Filtrate
A fermented botanical complex that may help calm irritation and support a healthy skin barrier, though human research is still limited.
Irritation
low
Source
biotech
Soothing Agent
SACCHAROMYCES/COIX LACRYMA-JOBI MA-YUEN SEED/GLUCOSE FERMENT FILTRATE
A gentle, fermented botanical that may help calm irritation and support skin hydration, though human studies are limited.
Irritation
low
Source
biotech
Skin conditioning
KLUYVEROMYCES/LACTOBACILLUS/JUNIPERUS COMMUNIS FRUIT OIL FERMENT FILTRATE
A gentle, fermented botanical oil that may help calm and condition the skin, though research is still emerging.
Irritation
low
Source
biotech
Soothing Agent
LACTOBACILLUS/AGASTACHE RUGOSA LEAF/STEM EXTRACT FERMENT FILTRATE
A fermented botanical extract that may help calm skin and provide antioxidant protection, though research is still emerging.
Irritation
low
Source
biotech
Soothing Agent
STREPTOCOCCUS THERMOPHILUS/LACTOBACILLUS/BIFIDOBACTERIUM/LICORICE ROOT EXTRACT FERMENT FILTRATE
A fermented botanical complex that may help calm skin and provide antioxidant benefits, though research is still emerging.
Irritation
low
Source
biotech
A fermented licorice root extract that helps calm redness and even out skin tone with minimal irritation risk.
Irritation
low
Source
natural
Soothing Agent
LACTOBACILLUS/PIPER LONGUM FRUIT/SANGUISORBA OFFICINALIS ROOT EXTRACT FERMENT FILTRATE
A fermented botanical extract that may help calm redness and support a healthy skin barrier, though human studies are limited.
Irritation
low
Source
biotech
Soothing agent
KLUYVEROMYCES/LACTOBACILLUS/NELUMBO NUCIFERA SEED OIL FERMENT FILTRATE
A fermented botanical complex that may help calm redness and support a healthy skin barrier, though human studies are limited.
Irritation
low
Source
biotech
Soothing agent
PSEUDOZYMA EPICOLA/MEADOWFOAM SEED OIL FERMENT EXTRACT FILTRATE
A gentle, biotech-derived ingredient that may help calm irritation and support the skin barrier, though research is still emerging.
Irritation
low
Source
biotech
Soothing agent
HERICIUM ERINACEUS/LACTOBACILLUS/LEUCONOSTOC/ARTEMISIA CAPILLARIS LEAF/STEM FERMENT FILTRATE
A fermented blend of lion's mane mushroom and mugwort that may help calm skin and support a healthy moisture barrier, though human studies are limited.
Irritation
low
Source
biotech
Soothing agent
LACTOBACILLUS/GANODERMA LUCIDUM EXTRACT/LENTINUS EDODES EXTRACT FERMENT FILTRATE
A fermented mushroom complex that may help calm skin and support a healthy barrier, though human studies are still limited.
Irritation
low
Source
biotech
Soothing Agent
KLUYVEROMYCES/LACTOBACILLUS/PAEONIA LACTIFLORA ROOT OIL FERMENT FILTRATE
A fermented botanical oil complex that may help calm skin and provide antioxidant support, though research on this specific ferment is still emerging.
Irritation
low
Source
biotech
A fermented mushroom extract that may help calm skin and provide antioxidant support, though human research is still limited.
Irritation
low
Source
biotech
Soothing agent
Kluyveromyces/Lactobacillus/Ophiopogon Japonicus Root Oil Ferment Filtrate
A gentle, fermented botanical oil complex that may help calm skin and provide antioxidant support, though research is still emerging.
Irritation
low
Source
biotech
A fermented blend that may help calm irritation and support skin hydration, but research is still early.
Irritation
low
Source
biotech
Soothing agent
BACILLUS/CLADOSIPHON OKAMURANUS/SOYBEAN FERMENT FILTRATE
A gentle, fermented blend of seaweed and soybean that may help calm skin and support hydration, though research is still early.
Irritation
low
Source
biotech
Soothing Agent
SACCHAROMYCES/SERICTERIUM EXTRACT/SODIUM BICARBONATE FERMENT FILTRATE
A gentle fermented extract that may help calm skin and provide antioxidant support, but research is still early.
Irritation
low
Source
biotech
Soothing Agent
Bacillus/Silk/Soybean/Tagetes Erecta Flower Ferment Filtrate
A gentle, fermented blend that may help calm skin and support hydration, though research is still emerging.
Irritation
low
Source
biotech
A gentle fermented ingredient that may help calm skin and support hydration, but research is still emerging.
Irritation
low
Source
biotech
A gentle, fermented fungus extract that may help calm skin and provide light hydration, though research is still limited.
Irritation
low
Source
biotech
Skin Conditioning Agent
ASPERGILLUS/POTATO STARCH/WHEAT FLOUR FERMENT FILTRATE
A gentle fermented ingredient that may help soothe and condition the skin, though research is still emerging.
Irritation
low
Source
biotech
Soothing Agent
BACILLUS/LACTOBACILLUS/STEVIA REBAUDIANA STALK EXTRACT FERMENT FILTRATE
A gentle, fermented botanical extract that may help calm skin and provide antioxidant support, though research is still emerging.
Irritation
low
Source
biotech
Soothing Agent
Pseudozyma Epicola/Sunflower Seed Oil Ferment Extract Filtrate
A gentle, yeast-fermented sunflower oil extract that may help calm irritation and support the skin barrier, though research is still emerging.
Irritation
low
Source
biotech
Soothing Agent
LACTOBACILLUS/ARTEMISIA ABSINTHIUM LEAF EXTRACT FERMENT FILTRATE
A gentle fermented botanical that may help calm irritation and support skin barrier function, though human studies are limited.
Irritation
low
Source
biotech
Feverfew flower extract is a gentle, antioxidant-rich botanical that helps calm skin and reduce visible redness.
Irritation
low
Source
natural
Feverfew juice is a gentle, antioxidant-rich botanical that can help calm irritated skin and reduce redness.
Irritation
low
Source
natural
A gentle marine extract with potential soothing and antioxidant benefits, but research is limited and sustainability concerns exist.
Irritation
low
Source
natural
A gentle, water-based frankincense extract that may help calm redness and provide antioxidant protection without the oiliness of frankincense essential oil.
Irritation
low
Source
natural
A gentle, natural resin extract that helps calm skin and fight free radical damage, but research on its cosmetic benefits is still emerging.
Irritation
low
Source
natural
A gentle, natural resin extract that helps calm irritation and provides antioxidant protection, but research is still emerging.
Irritation
low
Source
natural
Soothing agent
CANDIDA ALBICANS/FRITILLARIA VERTICILLATA BULB FERMENT EXTRACT
A fermented botanical extract with potential soothing and antioxidant benefits, but research is limited and mostly based on traditional use.
Irritation
low
Source
biotech
A gentle, fermentation-derived ingredient that may help calm skin and fight environmental stress, but research is still early.
Irritation
low
Source
biotech
A gentle, antioxidant-rich water from galangal root that may help soothe skin and protect against environmental stress.
Irritation
low
Source
natural
A gentle red algae extract that may help calm irritation and provide antioxidant support, though research is still emerging.
Irritation
low
Source
natural
Galbanum gum extract is a natural resin with mild soothing and antioxidant potential, but research on its cosmetic benefits is still limited.
Irritation
low
Source
natural
A fermented plant extract that may offer gentle soothing and conditioning, but research is limited.
Irritation
low
Source
biotech
A gentle plant extract that may help calm skin and fight free radicals, but research is still early.
Irritation
low
Source
natural
A fragrant, soothing oil from the myrrh family that may calm skin but can be irritating for sensitive types.
Irritation
moderate
Source
natural
A gentle, plant-derived extract that may help calm skin and fight free radicals, but research is still limited.
Irritation
low
Source
natural
Glaucine is a plant-derived alkaloid with early evidence of soothing benefits, but more research is needed to confirm its effectiveness in skincare.
Irritation
low
Source
natural
A gentle, plant-based extract that may help calm skin and provide light hydration, but research is still early.
Irritation
low
Source
natural