Evidence supporting the use of: Quercetin
For the health condition: Asthma

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Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Quercetin is a plant-derived flavonoid found in many fruits and vegetables, and it has been investigated for its potential anti-inflammatory and antioxidant effects, which are relevant to asthma management. Several preclinical studies (in vitro and animal models) suggest that quercetin can inhibit the release of inflammatory mediators, decrease airway hyperresponsiveness, and reduce oxidative stress—mechanisms that are implicated in asthma pathogenesis. For example, quercetin has been shown to suppress the production of cytokines such as IL-4, IL-5, and IL-13, and to inhibit eosinophil infiltration into lung tissue in asthmatic animal models. These actions theoretically could help alleviate asthma symptoms.

However, human clinical evidence remains limited. Only a small number of clinical trials have investigated quercetin supplementation in individuals with asthma, and results are preliminary and not yet conclusive. Most studies to date have small sample sizes, short durations, and sometimes conflicting outcomes. There is also a lack of consensus regarding optimal dosage, bioavailability, and long-term safety.

While quercetin is sometimes promoted in integrative or alternative medicine as a supportive agent for asthma, its use is not firmly established in conventional clinical guidelines. Overall, the evidence supporting quercetin for asthma can be considered modest and primarily preclinical, warranting further research before routine use can be recommended.

More about quercetin
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Other ingredients used for Asthma

adrenal cortex
alpha-pinene
apple
ashwagandha
Waterhyssop
bamboo
barberry
basil
beet
Myrobalan
benegut perilla (proprietary)
beta caryophyllene
betel
Bifidobacterium longum
black cumin
black currant
black garlic
black pepper
radish
Indian frankincense
bасора
caffeine
Cannabis sativa oil
carrot
caterpillar mushroom
Chinese salvia root
citrus oil
clove
cordyceps
cowage seed
turmeric
curcumin
DHA (docosahexaenoic acid)
EPA (eicosapentaenoic acid)
epigallocatechin gallate (EGCG)
fennel
fish oil
flavonols
forskohlii root
garlic bulb
ginger
ginkgo biloba
ginseng
glehnia root
gooseberry
Greek mountain tea
green-lipped mussel
onion
green tea
heartwood
horseradish
Indian gum arabic tree
Indian tinospora
jujube
kudzu
licorice root
luteolin
magnesium
Marine lipid
Marshmallow
Mastic gum
Moringa
mustard seed
N-acetyl-cysteine (NAC)
omega-3 fatty acids
ophiopogon root
orange
oregano
pear
perilla
phellodendron amurense
phytocannabinoids
pine bark
plantain
platycodon root
plum fruit
polygala root
pumpkin
quail egg
quercetin
raspberry
reishi mushroom
rhizome
rosemary
schizonepeta
scrophularia root
shiitake mushroom
slippery elm bark
specialized pro-resolving mediators (SPMs)
Sphaeranthus indicus
spirulina
thyme
Triphala
Almond fruit
vitamin C
vitamin D
vitamin D3
vitamin E
seaweed
Watercress
wheat grass
Mulberry
zhejiang fritillary
squawvine
Mullein
parthenium
typhonium
xanthium (cockleburs)
gastrodia
hyssop
cardamom
atractylodes
lobelia
papaya
shen-chu
capsicum
Mugwort
Indian bael
Neem tree
nut grass
malabar nut
alpinia galangal
Clerodendrum indicum
ferula assafoetida
Hedychium spicatum
inula racemosa
anise
pistacia integerrima gall
Tylophora
punarnava
commiphora
Tinospora cordifolia
blackboard tree
Caesalpinia crista
Swertia
bee pollen
chaff flower
peony
lingzhi
Szechuan lovage
buckthorn
fritillaria
Morus
lemongrass
Myrrh
Yerba santa
elecampane
coltsfoot
root tuber
chrysanthemum
siler root
amber
dioscorea
dodder
fern
ganoderma
sweet flag
hyacinth bean
sweetgums
Morinda
oriental arborvitae
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zanthoxylum
royal jelly
polyphenols
purslane
fulvic acid
Menthol oil
aster root
peach
biota seed
goji berry
paw paw
horehound
herbal blend (proprietary)
indigo leaves
cocoa
cayenne pepper
soursop
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Aralia
Agastache
Anamarrhena
angel\'s trumpet
ambergris
Ardisia
Angelica
Acacia
apigenin
Auricularia
anamu
Abrus
Asarum heterotropoides
Albizia
Aconite
asafoetida
Ajuga
andrographolide
Adrenergic amines
Aerva lanata
Agarwood
American Liverleaf
astragaloside
Andrographis
Alstonia scholaris
Asteraceae
Allium tuberosum
Amor seco
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Arisaema
Asarum sieboldii
apocynin
astragalin
atractylone
bee propolis
black seed
bermuda grass
Baikal Skullcap
Baphicacanthus cusia
Bidens pilosa
Broussonetia
bergenin
Blepharis
balsam
bishop\'s weed
Boswellic Acid
bayleaf
Butea monosperma
black galingale
Barleria
Bougainvillea
baicalein
bee hive
bael
Basidiomycota
Boswellia
Baccharoides anthelmintica
banyan
butterbur
bee products
black nightshade
Bombax
borassus palm
Borassus aethiopum
bacteria
borage
black root
banana
Bupleurum
bacoside
baicalin
Bassia scoparia
Black Hellebore
balloon flower
Belamcanda
Bergenia
Boerhavia diffusa
borneol
bird\'s nest
cumin
Chinese silkvine
curry leaf
caryophyllene
California chia
Cinnamomum
Chinese mountain ant
Clerodendrum trichotomum
cod liver oil
cortisol
Codonopsis
Cnidium
Clerodendrum phlomidis
cactus
capillary artemisia
citron
Curcuminoid
carry me seed
Citrus
cineole
catecholamine
Chinese raisintree
Chlorophytum
cowherb
curcumen
coca
cinnamic acid
chocolate
Chinese Ligustrum berry
Cinidium
Centipeda
cubeb
Curcuma
cypress
Chaenomeles lagenaria
Clostridium butyricum
Coin-leaf desmodium
chinatree
Cyanthillium cinereum
costus
Chekiang Fritillary
cola nut
Celosia
Clerodendrum indicum
divi-divi
dragonhead
Desmodium
Dichrostachys glomerata
Ephedra
European Elder
Erythropalum scandens
Eupolyphaga sinensis
Erodium cicutarium
Evodia
Eclipta
Echinodorus
eicosapentaenoic acid
essential oil blend
elephant\'s head
Euphorbia
ephedrine
European five-finger grass
Embelia
fig
fruit
flavonoids
Fomes fomentarius
fritillary
Ficus religiosa
fatty acids
fungus
fernbush
flavanones
Ficus simplicissima
fringed pink
frankincense
flavonones
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gallic acid
Glehnia littoralis
goldthread
Ginsenosides
Gnaphalium
Guava
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Gypenoside
garlic
ginkgolides
Grindelia
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giant blazingstar
Glechoma hederacea
garden cress
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Galangal
Guazuma ulmifolia
Heartsease
Himalayan salt
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honey
heal-all
Hemidesmus
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honey loquat syrup
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Herb Robert
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hemp
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Indian nightshade
iridoids
iridoid glycosides
isoquinoline alkaloids
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long pepper
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Ivy
Indian fagonia
Jatoba
jungli-bean
Javanese Long Pepper
Khella
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kiwi
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loquat
Lebbek
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lichen
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ligustilides
longan
luffa
lodhtree
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lotus
labrador tea
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little ironweed
liverwort
Loranthus
linalool
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mandarin
Mustard
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mallow
Mucilage
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mace
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marigold
magnolol
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orchid
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Premna
polymorpha
Phenylpropanoids
pagoda tree
Plantago
Pinellia ternata
Pluchea
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Prunus
Pentacyclic triterpenoids
Petasines
polyunsaturated fat
Polypodium
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Paris polyphylla
Peucedanum
Pyrrosia
Phthalides
Pentatropis capensis
Portulaca
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Passionfruit
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Pimpinella
Persimmon
paeoniflorin
Physalis angulata
Pycnogenol
Polygala
Petiveria
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Quisqualis
rue
Rubus
rosmarinic acid
Rubiaceae
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ravinsara
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Speedwell
Spanish Needle
Scoparia dulcis
Sete sangrias
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Solanaceae
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Stemona
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Salmon Oil
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Stellaria dichotoma
Sandalwood
Semecarpus anacardium
Stereospermum
saponins
Stachytarpheta cayennensis
Sumac
Sweet Bay
Storax
Sundew
Shilajit
Sword Bean
Terminalia
Terpenoids
Theobromine
Tea
Thymoquinone
Thymus
Tamaricaceae
Triterpenes
Theophylline
Tayuya
Thaumatococcus daniellii
Tulbaghia
Trametes
Tagetes
Tamarind
Tremella
Uncaria
Vervain
Visnea Mocanera
Varuna
Vasicine
Violet
Viola
Vladimiria souliei
Vasicinol
Vasicinone
Withanolides
Wulinshen
Xanthine
Xanthophyll
Yuzu
Yellow-Fruit Nightshade
Zucchini
Zingiberene
Zingerone

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