Evidence supporting the use of: Vitamin D (unspecified)
For the health condition: Influenza

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Synopsis

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

Vitamin D has been investigated for its potential role in supporting the immune system and reducing the risk or severity of viral infections, including influenza. The rationale stems from observations that vitamin D modulates innate and adaptive immune responses. Epidemiological studies have shown that influenza outbreaks are more common in winter, coinciding with periods of lower sunlight exposure and potentially lower vitamin D levels in populations. Some randomized controlled trials and meta-analyses suggest that vitamin D supplementation may reduce the risk of acute respiratory tract infections, but the evidence specific to influenza prevention or treatment is limited and mixed.

A 2017 meta-analysis published in BMJ indicated that vitamin D supplementation was associated with a reduced risk of acute respiratory tract infection, especially in individuals with severe vitamin D deficiency. However, the effect size for influenza specifically was not robust, and other studies have failed to show a significant benefit. The current consensus among health authorities is that while vitamin D is important for overall health and immune function, there is insufficient high-quality evidence to recommend vitamin D supplementation solely for the prevention or treatment of influenza.

In summary, vitamin D is sometimes used with the rationale of immune support, and there is some scientific investigation into its effects on respiratory infections, but its efficacy against influenza remains unproven and is not strongly supported by clinical evidence.

More about Vitamin D (unspecified)
More about Influenza

Other ingredients used for Influenza

green chiretta
astragalus
Myrobalan
benegut perilla (proprietary)
black garlic
black pepper
Indian frankincense
bupleurum falcatum
camu camu
catechins
caterpillar mushroom
chaga mushroom
Coptis chinensis
cordyceps
turmeric
dog rose
echinacea purpurea
elderberry
ginger
glehnia root
goldenseal
gooseberry
Greek mountain tea
green tea
honeysuckle
L-cysteine
Lactobacillus casei
Lactoferrin
Lactoperoxidase
Lentinula edodes mycelia
licorice root
Monolaurin
Nettle
quercetin
reishi mushroom
selenium
spirulina
sweet wormwood
vitamin C
vitamin D
zhejiang fritillary
Zinc
boneset
tangerine
alpinia galangal
Myrrh
Yerba santa
chrysanthemum
flowering quince
ganoderma
anemarrhena asphodeloides
eucalyptus
Abies spectabilis
Algae
avens
Agarikon Mushroom
apple cider vinegar
Agastache
Anamarrhena
Acacia
Agrimony
Allicin
anamu
AHCC
andrographolide
American Liverleaf
astragaloside
Andrographis
Alstonia scholaris
Adenophora
Alliin
Asarum sieboldii
bee propolis
black seed
Baikal Skullcap
Bryonia
balsam
Basidiomycota
borage
Bupleurum
baicalin
Black Hellebore
balloon flower
Clerodendrum trichotomum
coconut oil
coriolus mushroom
Clerodendrum phlomidis
carvacrol
cineole
Centipeda
Cistus
Chaenomeles lagenaria
currant
Chondrus
Ephedra
European Elder
elk antler
Echinacea
Elder
Euphorbia
Embelia
fat liver oil
flavanones
frankincense
flavones
Glehnia littoralis
Guaco
Gallesia
Glycyrrhizin
Hyperoside
Houttuynia
honey loquat syrup
Immunoglobulin G
iridoids
Lycium
Ledebouriella
Lomatium
lichen
Lycopodium
labrador tea
little ironweed
liverwort
Meadow sage
Microtea debilis
Neoandrographolides
Onosma bracteatum
Osthole
Premna
Platycodon
Pelargonium
Pentatropis capensis
Polygonatum
Polygonum
ravinsara
Sweet Annie
Salvia
Sambucus nigra
Sulfated polysaccharide
Shikimic Acid
Sweet Bay
Sundew
Tremella
Umckaloabo
Visnea Mocanera
Vasicine
Xanthophyll
Zingerone

Products containing Vitamin D (unspecified)

We currently have no products on Caring Sunshine that contain this ingredient.