Evidence supporting the use of: Vitamin C
For the body system: Respiratory System

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Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Vitamin C (ascorbic acid) has been investigated for its role in supporting the respiratory system, particularly in the context of respiratory infections such as the common cold and, more recently, COVID-19. Vitamin C is essential for the normal functioning of the immune system, and it acts as an antioxidant, helping to protect cells from oxidative stress, which is heightened during infections and inflammation in the respiratory tract. Historically, vitamin C became popular for preventing and treating the common cold in the 1970s, largely due to advocacy by Linus Pauling. Since then, numerous randomized controlled trials and meta-analyses have examined its effectiveness. According to a 2013 Cochrane review, regular vitamin C supplementation does not significantly reduce the incidence of colds in the general population, but it may reduce the duration and severity of respiratory symptoms. Some evidence also suggests that those under physical stress (e.g., athletes, soldiers) may benefit more from supplementation. In cases of severe respiratory infections, such as pneumonia, vitamin C levels in the blood are often depleted, and supplementation may help improve outcomes, although this evidence is less robust and sometimes conflicting. Overall, vitamin C is scientifically validated as supportive for certain aspects of respiratory health, particularly in reducing the severity and duration of mild infections, but it is not a cure or universally preventative measure.

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Other ingredients that support Respiratory System

Abies spectabilis
Abrus
Achyranthes
Aconite
Adenophora
Adrenergic amines
Aerva lanata
Agarikon Mushroom
Agarwood
Agastache
Agrimony
Ajoene
Albizia
Alchornea
Alfalfa
Algae
Allicin
Allium tuberosum
alpha-pinene
alpha-terpineol
alpinia galangal
Alstonia macrophylla
Alstonia scholaris
American Liverleaf
Amomum
Amor seco
Anamarrhena
anamu
Andrographis
andrographolide
Anemarrhena
anemarrhena asphodeloides
Anemone
Angelica
anise
Antrodia camphorata
apocynin
Aquilegia formosa
arabinogalactan
Aralia
Ardisia
Arisaema
Artemisia anomala
asafoetida
asarabacca
Asarum heterotropoides
Asarum sieboldii
Asclepias cordifolia
aster root
Asteraceae
astragalus
aucubin
Baccharis dracunculifolia
bael
baicalein
baicalin
Baikal Skullcap
balloon flower
balsam
Baphicacanthus cusia
Barleria
barley
Basidiomycota
basil
bayberry
bayleaf
bee pollen
bee products
bee propolis
Begonia fimbristipula
Belamcanda
belleric myrobalan
benegut perilla (proprietary)
benzoin
Bergenia
bergenin
berry
beta-pinene
betel
bethroot
betony
Bidens pilosa
bignay
birch
bird\'s nest
bishop\'s weed
bistort
bittersweet
black cumin
black nightshade
black pepper
black poplar
black seed
Black spruce
black tea
black-eyed Susan
blackthorn
Blepharis
Bletilla
bloodroot
Boerhavia diffusa
boneset
borage
borneol
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Boswellic Acid
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broccoli
bromelain
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Buddha\'s hand
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bupleurum falcatum
butterbur
Caesalpinia crista
caffeine
cajuput
calamus
California redbud
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camphor oil
capillary artemisia
capsaicin
cardamom
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cayenne pepper
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cineole
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cod liver oil
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Combretum quadrangulare
commiphora
copaiba oil
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coriolus mushroom
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cruciferous
cubeb
cumin
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cutch
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cypress
deer velvet
Dendrobium
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devil\'s club
diallyl trisulfide (DATS)
Dichroa
Dichrostachys glomerata
dill
diterpenes
dodeca-2E, 4E, 8Z, 10Z/tetraenoic acid isobutylamide
dodeca-2E, 4E-dienoic acid isobutylamide
dog rose
dragonhead
dragon\'s blood
Dwarf Nettle
dyer’s woad root
Echinacea
echinacea purpurea
Elder
elderberry
elecampane
elemi
elephant vine
elephant\'s head
elkweed
emodin
English horsemint
EPA (eicosapentaenoic acid)
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ephedrine
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fatty acids
fennel
fenugreek
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ferula assafoetida
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flat-stem milk-vetch
flavanones
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fleabane
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Fomitopsis pinicola
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forskolin
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fritillaria
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Ivy
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Kachnar
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little ironweed
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melaleuca alternifolia
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Momordica
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Mustard
mustard seed
Myricetin
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Nardostachys
Naringenin
Nasturtium
Neem tree
Neoandrographolides
Nettle
New Jersey Tea
Nigella seed
Night jessamine
noni
omega-3 fatty acids
onion
Onosma bracteatum
Operculina turpethum
Ophiopogon
ophiopogon root
orange
Orchis latifolia
oregano
oriental arborvitae
Oroxylum indicum
Osha
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Osthole
Oxymatrine
Oxystelma
Oxytropis falcata
Pacific madrone
pagoda tree
Palmitoylethanolamide (PEA)
Paris polyphylla
parsley
pau d'arco
Pelargonium
Pellitory
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Pentacyclic triterpenoids
Pepper
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perilla
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phenolic compounds
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pineapple
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pistacia integerrima gall
Plantago
plantain
Platycodon
platycodon root
Plectranthus amboinicus
Pluchea
Plumbago zeylanica
Polydatin
Polygala
polygala root
Polygonatum
Polygonum
polyphenols
Polypodium
poplar
poppy
Portulaca
Potentilla
Premna
prepared aconite tuber
probiotics
Propolis
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Pulsatilla
punarnava
Purple milkweed
purslane
Quebracho
quercetin
quince
radish
ravinsara
red clover
red root
red soapwort
reishi mushroom
Rhabdosia rubescens
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Rhus coriaria
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Robinia pseudoacacia
rockweed
rose hips
rosemary
rosmarinic acid
rubber rabbitbrush
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Sabadilla
sage
Sagebrush
salt
Salvia
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Sandalwood
Sanguisorba
Sanicle
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saponins
Sarcandra glabra
Sassafras
Savory
Schisandrins
schizonepeta
Schizophyllum commune
Scoparia dulcis
scrophularia root
Sesquiterpenes
Sete sangrias
sheep's sorrel
shiitake mushroom
Sichuan Lovage
Sida cordifolia
Sidalcea glaucescens
siler root
silk tree
Sinapis arvensis
Sinensetin
Sinomenium acutum
skullcap
Skunkvine
Slippery Elm
slippery elm bark
Snakeroot
Solanaceae
Solanum anguivi
Solanum indicum
soursop
Southernwood
spearmint leaf
Speedwell
Spikenard
Spiraea
spruce
Stachytarpheta cayennensis
Stemona
Stereospermum
Stillingia
Storax
Streptococcus salivarius
Sulfated polysaccharide
Sulforaphane
sulforaphane glucosinolate
Sumbul
Sundew
sunflower
Sweet Annie
Sweet Bay
sweet flag
sweetgums
Sword Bean
Szechuan lovage
Tagetes
tartarian aster
Tea
Tea Tree Oil
Tejocote
Terminalia
Terpenoids
Terpinen-4-ol
Teucrium marum
Theophylline
Thiosulfinate
Thuja
thyme
Thymol
Thymoquinone
Trametes
Tree of heaven
Trichosanthes
Tridax
Tromethamine
Tulbaghia
Turkey tail mushroom
turmeric
Tylophora
Tylophorine
Tynanthus elegans
Tynanthus panurensis
typhonium
Typhonium flagelliforme
Ulmus
Umckalin
Umckaloabo
Uncaria
Vasicine
Vasicinol
Vasicinone
vegetable blend (proprietary)
Verbena
Veronica
Vervain
Viburnum
Vidanga
Vincetoxicum
Viola
vitamin A
vitamin C
vitamin D
vitamin D3
vitamin E
Vladimiria souliei
Waltheria ovata
White Dead Nettle Flower
White Poplar
Whiteweed
Wild Daisy
Winter Savory
Wogonin
Wood betony
Woolly Grass
Xanthine
xanthium (cockleburs)
Yarrow
Yerba buena
Yerba mate
Yerba santa
zanthoxylum
Zedoary
zhejiang fritillary
Zinc

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Metagenics Wellness Essentials Healthy Balance Daily Packs
Metagenics Wellness Essentials Men's Vitality Daily Packs
Metagenics Wellness Essentials Women's Daily Packs
Metagenics Wellness Essentials Women's Prime Daily Packs
Thorne Women's Multi 50+
Pure Encapsulations Women's Nutrients
Pure Encapsulations Women's Nutrients
Designs For Health Women's Twice Daily Essential Packets