Evidence supporting the use of: Vitamin C
For the health condition: Cough (general)

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Synopsis

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

Vitamin C (ascorbic acid) is commonly used to support immune function and is sometimes recommended for the prevention and treatment of respiratory tract infections, including coughs related to the common cold. The scientific evidence supporting its use for cough specifically is modest. Several meta-analyses and systematic reviews have examined the effects of vitamin C on the duration and severity of common cold symptoms. The general consensus is that regular vitamin C supplementation (typically at doses of 200 mg/day or more) can slightly reduce the duration and severity of cold symptoms, including cough, particularly in people under physical stress (e.g., athletes, soldiers). However, taking vitamin C after the onset of symptoms has not consistently shown benefit in reducing cough duration or intensity.

Historically, vitamin C has been valued for its role in immune health, and its popularity for treating colds and coughs can be traced back to the advocacy of Linus Pauling in the 1970s. Despite its widespread use, high-quality, large-scale clinical trials have not confirmed a strong effect on cough itself. The evidence is therefore rated as moderate to low (2/5) for cough relief, with the main benefits being minor reductions in symptom duration rather than targeted cough suppression. Current guidelines do not recommend vitamin C as a primary treatment for cough, but it may offer mild symptomatic support as part of general immune support.

More about vitamin C
More about Cough (general)

Other ingredients used for Cough (general)

allspice
aloe vera
alpha-pinene
apple
waterhyssop
bamboo
basil
benegut perilla (proprietary)
beta-pinene
black cumin
black currant
black pepper
radish
Indian frankincense
carrot
cassia bark
cat's claw
chen pi
Chinese salvia root
cinnamon
clove
cowage seed
turmeric
elderberry
fennel
garlic bulb
ginger
glehnia root
grape
greek mountain tea
onion
green tea
heartwood
Indian tinospora
jujube
lemon
licorice root
lovage
marshmallow
nettle
ophiopogon root
orange
oregano
parsley
pear
perilla
phellodendron amurense
platycodon root
plum fruit
polygala root
pomegranate
pumpkin
raspberry
spearmint leaf
sphaeranthus indicus
thyme
vitamin C
zhejiang fritillary
zinc
sarsaparilla
boneset
mullein
tangerine
hyssop
atractylodes
lobelia
capsicum
Indian bael
neem tree
malabar nut
alpinia galangal
ferula assafoetida
hedychium spicatum
inula racemosa
anise
pistacia integerrima gall
punarnava
fumaria parviflora
prickly ash
fritillaria
lemongrass
yerba santa
elecampane
coltsfoot
root tuber
silk tree
juniper berries
amber
dodder
sweet flag
hyacinth bean
eucalyptus
menthol oil
peach
abies spectabilis
horehound
soursop
Alcohol
Aralia
Apple Cider Vinegar
Agastache
Anamarrhena
Alpha-terpineol
Ambergris
Ardisia
Angelica
acacia
Agave
Allicin
Anamu
Abrus
Alchornea
Asarum heterotropoides
Albizia
Aconite
Asafoetida
Ajuga
Andrographolide
Aerva lanata
Agarwood
Asam gelugor
Arrowroot
Andrographis
Alsonia scholaris
Allyl Sulfide
Aspen
Adenophora
Allium tuberosum
Amor seco
Aniseed myrtle
Asarum sieboldii
Alantolactone
Atractylone
Black Seed
Bermuda Grass
Bryonia
Blepharis
Bayleaf
Blackbrush
Big Quaking Grass
Bougainvillea
Bael
Butternut
berry
Baccharoides anthelmintica
black salt
Bee products
Borassus Palm
Buddha's Hand
Borassus aethiopum
Borage
banana
Bassia scoparia
Burning Bush
Balloon Flower
Belamcanda
Bergenia
Boerhavia diffusa
Coconut
Cactus
Citron
Citrus
Cineole
Capsaicin
Chenopodium
Cistus
Common madia
Cubeb
Cowslip
Chaenomeles lagenaria
Calamus
Coin-leaf desmodium
Cyanthillium cinereum
Cinnamaldehyde
Costus
Chekiang Fritillary
cola nut
Celosia
Clerodendrum indicum
Culvers Root
Currant
Chondrus
Dragonhead
Diterpenes
Desmodium
Dichrostachys glomerata
Empresstree
English Horsemint
Echinacea
Elder
European Field Elm
Ephedrine
Embelia
Fig
Garlic
Galangal
Himalayan Salt
Ivy
Lily
Poppy
Rose
Spikenard
Sumac
Zucchini

Other health conditions supported by vitamin C

Abrasions
Abscesses
Acne
Acquired Immune Deficiency Syndrome
Addictions (general remedies for)
Addison's Disease
Adrenal Fatigue
Age Spots
Aging (prevention)
Alcoholism
Allergies (food)
Allergies (respiratory)
Alzheimer's Disease
Anal Fistula or Fissure
Anemia
Antibiotics (alternatives to)
Antibiotics (side effects of)
Anxiety
Arteriosclerosis
Arthritis
Asthma
Athletic and Exercise Aids
Autism
Autoimmune Disorders
Bell's Palsy
Bites and Stings
Bladder Infection
Bleeding (external)
Bleeding (internal)
Blood Poisoning
Boils
Bronchitis
Bruises (healing)
Bruises (prevention)
Burns and Scalds
Cancer (natural therapy for)
Cancer (prevention)
Cancer Treatment (reducing side effects)
Canker Sores
Capillary Weakness
Carbuncles
Cardiovascular Disease
Cartilage Damage
Cataracts
Cervical Dysplasia
Chemical Poisoning
Chemotherapy (reducing side effects)
Chicken Pox
Cholesterol (high)
Chronic Obstructive Pulmonary Disorder
Cold Sores
Colds (antiviral)
Colds (decongestant)
Colds (general)
Colds (prevention)
Colds (with fever)
Colon (atonic)
Congestion
Congestion (bronchial)
Congestion (lungs)
Congestion (sinus)
Conjunctivitis
Contagious Diseases
Convalescence
Copper Toxicity
Cough (dry)
Cough (general)
Cuts
Cystic Breast Disease
Cystic Fibrosis
Debility
Dementia
Denture Sores
Depression
Diabetes
Diabetic Retinopathy
Environmental Pollution
Epstein Barr Virus
Eye Problems
Eyesight (poor)
Fatigue
Fatty Liver Disease
Free Radical Damage
Gall Stones
Gastritis
Gingivitis
Glaucoma
Gonorrhea
Gout
Hair (loss or thinning)
Hair Care (general)
Heart (weakness)
Heavy Metal Poisoning
Hemorrhoids
Hepatitis
Herpes
Hot Flashes
Hypertension
Infection
Infection (bacterial)
Infection (viral)
Infertility
Inflammation
Inflammatory Bowel Disorders
Influenza
Injuries
Knees (weak)
Laryngitis
Lead Poisoning
Lesions
Leucorrhea
Leukemia
Ligaments (torn or injured)
Liver Detoxification
Lyme Disease
Macular Degeneration
Mastitis
Measles
Memory and Brain Function
Menorrhagia
Menstrual Irregularity
Menstruation (scant)
Metabolic Syndrome
Mononucleosis
Mumps
Nose Bleeds
Oral Surgery
Osteoporosis
Pancreatitis
PMS (general)
PMS Type C
PMS Type H
Pneumonia
Post Partum Weakness
Pregnancy (herbs and supplements for)
Progesterone (low)
Prolapsed Uterus
Prostatitis
Radiation Sickness
Rashes and Hives
Restless Leg Syndrome
Rheumatoid Arthritis
Rhinitis
Rhinitis, Allergic
Rosacea
Scars / Scar Tissue
Schizophrenia
Scratches and Abrasions
Scurvy
Shingles
Shock
Sinus Infection
Skin (infections)
Skin Care (general)
Sore Throat
Spider Veins
Spinal Disks
Sprains
Strep Throat
Stretch Marks
Sunburn
Surgery (healing from)
Surgery (preparation for)
Teeth (loose)
Tendonitis
Thrush
Tickle in Throat
Tonsillitis
Tooth Extraction
Toxemia
Triglycerides (high)
Tuberculosis
Ulcerations (external)
Ulcers
Uric Acid Retention
Urinary Tract Infections
Vaginitis
Varicose Veins
Warts
Wounds and Sores
Wrinkles

Products containing vitamin C

Pure Encapsulations Acerola/Flavonoid
Vitabase Active Man's Formula
Vitabase Active Woman's Multi
Designs For Health Adrenal Complex
Designs For Health Adrenal Complex
Designs For Health Adrenotone™
Designs For Health Adrenotone™
Metagenics AdvaClear
Metagenics AdvaClear
Thorne Advanced Nutrients Multivitamin
Pure Encapsulations Aller-Essentials
Pure Encapsulations Aller-Essentials
Thorne Ascorbic Acid
Douglas Laboratories Ascorbplex ® 1000 Buffered
Pure Encapsulations Ascorbyl Palmitate
Metagenics Axis Endo™ Mango
Thorne Basic Nutrients 2/Day Multivitamin
Thorne Basic Prenatal Multivitamin
Designs For Health BioFizz® Immune
Vitabase Blood Sugar Formula
Metagenics Bone Builder Active
Pure Encapsulations Buffered Ascorbic Acid
Pure Encapsulations Buffered Ascorbic Acid
Pure Encapsulations Buffered Ascorbic Acid
Thorne Buffered C Powder
Integrative Therapeutics Buffered Vitamin C
Douglas Laboratories C-1000
Douglas Laboratories C-1000
Douglas Laboratories C-D-Zinc
Douglas Laboratories C-Max ®
Thorne Catalyte
Designs For Health CatecholaCalm™
Designs For Health C+BioFizz®
Vitabase Chewable Vitamin C
Metagenics Clear Change 10-Day Detox Program with UltraClear Plus Berry
Metagenics Clear Change 10-Day Detox Program with UltraClear Plus pH
Metagenics Clear Change 10-Day Detox Program with UltraClear Plus pH Pineapple Banana
Metagenics Clear Change 10-Day Detox Program with UltraClear Plus Pineapple Banana
Metagenics Clear Change 10-Day Detox Program with UltraClear Plus Vanilla
Metagenics Clear Change 10-Day Detox Program with UltraClear RENEW Berry
Metagenics Clear Change 10-Day Detox Program with UltraClear RENEW Chai
Metagenics Clear Change 10-Day Detox Program with UltraClear RENEW Vanilla
Metagenics Clear Change 28-Day Detox Program with UltraClear Plus Berry
Metagenics Clear Change 28-Day Detox Program with UltraClear Plus pH Pineapple Banana
Metagenics Clear Change 28-Day Detox Program with UltraClear Plus pH Vanilla
Metagenics Clear Change 28-Day Detox Program with UltraClear Plus Pineapple Banana
Metagenics Clear Change 28-Day Detox Program with UltraClear Plus Vanilla
Metagenics Clear Change 28-Day Detox Program with UltraClear RENEW Berry
Metagenics Clear Change 28-Day Detox Program with UltraClear RENEW Chai
Metagenics Clear Change 28-Day Detox Program with UltraClear RENEW Vanilla
Metagenics Clear Change Daily Essentials
Integrative Therapeutics Clinical Nutrients HP
Metagenics Collagenics®
Metagenics Cortico-B5B6®
Designs For Health CraveArrest™
Thorne Crucera-SGS
Pure Encapsulations Daily Immune
Designs For Health Detox Antiox™
Integrative Therapeutics Detoxication Factors
Integrative Therapeutics Detoxication Factors
Designs For Health Detoxification Support Packets
Designs For Health DFH Complete Multi™
Designs For Health DFH Complete Multi™ with Copper
Designs For Health DFH Complete Multi™ with Copper & Iron
Metagenics Echinacea Synergy
Integrative Therapeutics EHB
Pure Encapsulations Electrolyte/Energy Formula
Designs For Health Electrolyte Synergy™
Designs For Health ElectroPure Hydration™
Metagenics Endefen® Powder
Designs For Health EndoTrim™
Metagenics Endura® Lemonade
Pure Encapsulations Energize Plus™ Pure Pack
Pure Encapsulations Essential-C & Flavonoids
Pure Encapsulations Essential-C & Flavonoids
Pure Encapsulations EyeProtect Basics
Pure Encapsulations EyeProtect Basics without Zinc
Metagenics Fem EstroPlex®
Metagenics Fem Prenatal®
Thorne Ferrasorb
Designs For Health GastroMend-HP™
Designs For Health GastroMend-HP™
Metagenics GI Sustain™ Powder
Pure Encapsulations GlucoFunction
Pure Encapsulations GlucoFunction
Douglas Laboratories Glucosamine + MSM Forte ™
Douglas Laboratories Glucosamine Plus ™
Metagenics Glucosamine Sulfate
Metagenics Glucosamine Sulfate 750™
Metagenics GlutaClear®
Metagenics Glutagenics
Metagenics Glycogenics
Designs For Health H-S-N Radiance™
Douglas Laboratories Hair, Skin and Nails Plus
Vitabase Hair, Skin & Nails Formula
Pure Encapsulations Hair/Skin/Nails Ultra
Metagenics Herbulk® Powder Natural Orange
Pure Encapsulations Hist Reset
Designs For Health HistaEze™
Douglas Laboratories Hydrolyzed Collagen+
Metagenics ImmuCore
Metagenics Immune Active
Metagenics Immune Defense Pack
Pure Encapsulations Iron-C
Integrative Therapeutics Iron Complex
Integrative Therapeutics K-PAX MitoNutrients
Metagenics Ketogenic Shake Chocolate
Metagenics Ketogenic Shake Vanilla
Klean Athlete Klean Antioxidant ™
Klean Athlete Klean-C™
Klean Athlete Klean Collagen+C™
Klean Athlete Klean Hydration™
Klean Athlete Klean Hydration™
Klean Athlete Klean Multivitamin ™
Thorne L-Arginine Plus Perfusia Plus
Designs For Health L-Tyrosine
Vitabase Life's Essentials Plus
Pure Encapsulations Ligament Restore
Pure Encapsulations Ligament Restore
Metagenics Lipo-Gen™
Metagenics Lipo-Gen
Pure Encapsulations Liposomal Vitamin C
Designs For Health Liposomal Vitamin C
Vitabase Liquid Collagen Toasted Cinnamon
Douglas Laboratories Liquid Multivitamin
Pure Encapsulations LiquiNutrients
Pure Encapsulations Macular Support Formula
Pure Encapsulations Macular Support Formula
Integrative Therapeutics Magtein L-Threonate Plus
Douglas Laboratories Malic Acid + Magnesium
Thorne MediClear Plus
Thorne Men's Multi 50+
Designs For Health Metabolic Synergy™
Designs For Health Metabolic Synergy™
Metagenics MetaGlycemX™
Metagenics MetaGlycemX
Metagenics MetaKids Multi Soft Chew Grape
Metagenics MetaKids Nutrition Powder Chocolate
Metagenics MetaKids Nutrition Powder Vanilla
Metagenics MetaKids Vitamin D3 Liquid
Pure Encapsulations Mitochondria-ATP
Metagenics MitoVive
Designs For Health Monolaurin-Avail™
Pure Encapsulations Multi t/d
Pure Encapsulations Multi t/d
Thorne Multi-Vitamin Elite NSF
Thorne Multi-Vitamin Elite NSF
Metagenics Multigenics®
Metagenics Multigenics Chewable Orange
Metagenics Multigenics Intensive Care
Metagenics Multigenics Intensive Care without Iron
Metagenics Multigenics without Iron
Integrative Therapeutics Multiplex-1 No-Iron
Douglas Laboratories Natural C
Pure Encapsulations NeuroMood Pure Pack
Pure Encapsulations Nitric Oxide Support
Designs For Health NOx Synergy™
Pure Encapsulations Nutrient 950®
Pure Encapsulations Nutrient 950®
Pure Encapsulations Nutrient 950®
Pure Encapsulations Nutrient 950® A without Copper & Iron
Pure Encapsulations Nutrient 950® with NAC
Pure Encapsulations Nutrient 950® with Vitamin K
Pure Encapsulations Nutrient 950® without Copper, Iron & Iodine
Pure Encapsulations Nutrient 950® without Iron
Pure Encapsulations Nutrient 950® without Iron
Integrative Therapeutics Nutrivitamin No-Iron
Pure Encapsulations O.N.E.™ Multivitamin
Pure Encapsulations O.N.E.™ Multivitamin
Pure Encapsulations O.N.E.™ Multivitamin
Designs For Health OcuForce™
Pure Encapsulations OptiFerin-C
Designs For Health OsteoForce™
Designs For Health OsteoForce™
Designs For Health OsteoForce™ Supreme
Integrative Therapeutics Osteoprime Forte
Integrative Therapeutics Osteoprime Ultra
Designs For Health PaleoCleanse Plus™
Designs For Health PaleoCleanse Plus™
Designs For Health PaleoCleanse Plus™ Detox Program
Designs For Health PaleoCleanse Plus™Chocolate Detox Kit
Designs For Health PaleoMeal®
Designs For Health PaleoMeal®
Integrative Therapeutics Physicians Elemental Diet Dextrose Free
Integrative Therapeutics Physician's Elemental Diet
Integrative Therapeutics Physician's Elemental Diet
Integrative Therapeutics Physicians Elemental Diet Kit
Metagenics PhytoGanix® Tropical Fruit
Metagenics PhytoMulti™ Multivitamin
Metagenics PhytoMulti With Iron
Metagenics PhytoMulti Without Iron
Metagenics PhytoMultivitamin
Designs For Health Plant Protein Cleanse
Designs For Health Plant Protein Cleanse Plus™ 570g
Designs For Health Plant Protein Meal
Designs For Health Plant Protein Meal Plus
Designs For Health Plant Protein Meal
Metagenics PlusOne® Daily Prenatal Packs
Pure Encapsulations Polyphenol Nutrients
Pure Encapsulations Polyphenol Nutrients
Douglas Laboratories Prenatal
Pure Encapsulations PreNatal Nutrients
Pure Encapsulations PreNatal Nutrients
Designs For Health Prenatal Pro™
Designs For Health Primal Multi™
Integrative Therapeutics ProThrivers Multivitamin
Pure Encapsulations PureDefense
Pure Encapsulations PureDefense with NAC
Pure Encapsulations PureDefense with NAC
Pure Encapsulations PureGenomics® Multivitamin
Pure Encapsulations PureGenomics® UltraMultivitamin
Pure Encapsulations PureLean® Protein
Pure Encapsulations PurePals
Pure Encapsulations PurePals with Iron
Pure Encapsulations PureResponse™ Multivitamin
Vitabase Quercetin Plus
Designs For Health Quercetin-Ascorbate
Douglas Laboratories Quercetin-Bromelain Complex
Douglas Laboratories Selenium Plus
Pure Encapsulations SeroPlus
Metagenics Sinuplex®
Designs For Health Stellar C™
Thorne Stress Balance Phytisone
Vitabase Super Antioxidant Formula
Vitabase Super Fat Burner
Vitabase Super Stress Formula
Thorne Thyrocsin
Pure Encapsulations Thyroid Support Complex
Designs For Health Twice Daily Essential Packets
Designs For Health Twice Daily Multi™
Designs For Health Twice Daily Multi™
Designs For Health Twice Daily Multi™
Metagenics Ultra Glucose Control® Chocolate
Metagenics Ultra Glucose Control Chocolate
Metagenics Ultra Glucose Control Vanilla
Metagenics Ultra Glucose Control Vanilla
Metagenics Ultra Potent-C 1000
Metagenics Ultra Potent-C 500
Metagenics Ultra Potent-C Chewable
Metagenics Ultra Potent-C Powder
Douglas Laboratories Ultra Preventive
Douglas Laboratories Ultra Preventive
Douglas Laboratories Ultra Preventive ® 2 Daily
Douglas Laboratories Ultra Preventive 50+ -EZ Swallow
Douglas Laboratories Ultra Preventive ®-EZ Swallow
Douglas Laboratories ULTRA PREVENTIVE® III W/COPPER
Douglas Laboratories Ultra Preventive ® Kids Grape Flavor
Douglas Laboratories Ultra Preventive ® Kids Orange Flavor
Douglas Laboratories Ultra Preventive One Daily
Douglas Laboratories Ultra Preventive® X
Douglas Laboratories Ultra Protein Green
Pure Encapsulations Ultra Pure Pack
Metagenics UltraClear Detox Powder
Metagenics UltraClear Plus® Detox Powder
Metagenics UltraClear Plus Detox Powder Berry
Metagenics UltraClear Plus Detox Powder Pineapple/Banana
Metagenics UltraClear Plus pH Detox Powder Pineapple/Banana
Metagenics UltraClear Plus pH Detox Powder Vanilla
Metagenics UltraClear RENEW Detox Powder Berry
Metagenics UltraClear RENEW Detox Powder Chai
Metagenics UltraClear RENEW Detox Powder Vanilla
Pure Encapsulations UltraDetox 10-Day Pure Pack
Metagenics UltraGI Replenish® Chocolate
Metagenics UltraGI Replenish Chocolate
Metagenics UltraGI Replenish Vanilla
Metagenics UltraGI Replenish Vanilla
Metagenics UltraInflamX Plus 360°® Chocolate/Orange
Metagenics UltraInflamX Plus 360° Mango
Metagenics UltraInflamX Plus 360° Mango
Metagenics UltraInflamX Plus 360° Orange
Metagenics UltraInflamX Plus 360° Original Spice
Metagenics UltraInflamX Plus 360° Pineapple/Banana
Metagenics UltraInflamX Plus 360° Pineapple/Banana
Metagenics UltraMeal Advanced Protein® Dutch Chocolate
Metagenics UltraMeal Advanced Protein French Vanilla
Metagenics UltraMeal Advanced Protein Plain
Metagenics UltraMeal Cardio 360°® Pea/Rice Chocolate
Metagenics UltraMeal Cardio 360° Pea/Rice Vanilla
Metagenics UltraMeal® Daily Support Dutch Chocolate
Metagenics UltraMeal Daily Support Mixed Berry
Metagenics UltraMeal Rice Vanilla
Pure Encapsulations UltraNutrient®
Pure Encapsulations UltraNutrient®
Pure Encapsulations UltraNutrient®
Pure Encapsulations Uric Acid Formula
Designs For Health Vessel Forte™
Pure Encapsulations VisionPro Nutrients
Pure Encapsulations Vitamin C
Douglas Laboratories Vitamin C 1000 mg
Vitabase Vitamin C
Douglas Laboratories Vitamin C
Designs For Health Vitamin C Buffered Powder
Thorne Vitamin C With Flavonoids
Integrative Therapeutics Vitamin C with Quercetin
Metagenics Vitamin D3 Liquid
Designs For Health Weight Loss Support Packets
Metagenics Wellness Essentials Active Daily Packs
Metagenics Wellness Essentials Brain Health Daily Packs
Metagenics Wellness Essentials® Daily Packs
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