Relationship: Cancer (prevention) and vitamin C

Evidence supporting the use of: Vitamin C
For the health condition: Cancer (prevention)

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Synopsis
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Synopsis

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

Vitamin C (ascorbic acid) has a long and complex history regarding its use in cancer prevention and treatment. Scientific interest was sparked in the 1970s when Nobel laureate Linus Pauling and colleagues suggested high-dose vitamin C could help cancer patients, based on early clinical observations and theoretical antioxidant properties. These early studies were not randomized and later randomized controlled trials failed to show a survival benefit for oral vitamin C in cancer patients. More recently, attention has shifted to intravenous (IV) vitamin C, which can achieve much higher plasma concentrations than oral dosing. Preclinical studies suggest that high-dose IV vitamin C may exert pro-oxidant effects selectively toxic to cancer cells and may enhance the efficacy of some chemotherapies. However, large-scale, high-quality clinical trials in humans are still lacking, and the current evidence for vitamin C as a cancer preventive agent remains limited and inconclusive. While some epidemiological studies associate higher vitamin C intake from fruits and vegetables with lower cancer risk, these findings do not establish causality and may reflect overall healthier lifestyles. Major cancer organizations do not currently recommend vitamin C supplements specifically for cancer prevention or treatment outside of clinical trials. In summary, scientific interest exists, and some early-phase research is promising, but the overall evidence supporting vitamin C for cancer prevention is weak at present.

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More about Cancer (prevention)

Other ingredients used for Cancer (prevention)

7-hydroxymatairesinol (HMR)
acai berry
ajoene
akkermansia muciniphila
algal oil
alpha-carotene
alpha-linolenic acid (ALA)
anthocyanins
apple
apricot
ashwagandha
astaxanthin
astragalus
barberry
barley
basil
beet
berberine
berry flavor
beta and delta tocopherols
beta caryophyllene
beta-carotene
Beta-Glucan
beta-sitosterol
bisabolol
black cumin
black garlic
radish
sesame
black tea
black walnut
blackberry
blueberry
branched-chain amino acids
broccoli
brussel sprouts
burdock
butyrate triglyceride
capsaicinoids
carrot
cat's claw
catechins
caterpillar mushroom
cauliflower
chaga mushroom
champignon
cherry
chia seed
Chinese salvia root
chlorella
chlorophyll
chokeberry
cinnamon
citrus bioflavonoids
citrus oil
citrus pectin
clove
collard
conjugated linoleic acid (CLA)
cordyceps
cowage seed
cryptoxanthin
turmeric
curcumin
d-alpha tocopherol
d-glucarate
daidzin
DHA (docosahexaeonic acid)
diallyl disulfide (DADS)
diallyl trisulfide (DATS)
DIM (diindolylmethane)
dong quai root
DPA (docosapentaenoic acid)
eleuthero
EPA (eicosapentaenoic acid)
epigallocatechin gallate (EGCG)
fiber blend (proprietary)
fisetin
fish oil
fish protein
flavonols
flaxseed
folate
fruit and vegetable blend (proprietary)
gamma tocopherol
garlic bulb
genistein
genistin
ginger
ginseng
gooseberry
grape
grapefruit
greek mountain tea
onion
green tea
greens blend (proprietary)
hesperetin
hesperidin
hibiscus
HMR lignan
Indian tinospora
indole-3-carbinol
knotweed
jujube
kale
kelp
lactoferrin
lemon
lentinula edodes mycelia
lignans
lion's mane
lutein
luteolin
lychee
lycopene
mackerel
maitake mushroom
mangosteen
marine lipid
matcha
medium chain triglycerides (MCT)
mixed carotenoids
moringa
mustard seed
naringin
nettle
niacinamide (vitamin B3)
oleanolic acid
oleic acid
olive
omega-3 fatty acids
orange
oyster mushroom
parsley
pectin
perilla
phellodendron amurense
phenolic acids
phytosterols
pineapple
plum fruit
pomegranate
pomelo
protein
butyric acid
pumpkin
quail egg
quercetin
quinoa
raspberry
reishi mushroom
resveratrol
rhizome
rosemary
rutin
sardines
secoisolariciresinol diglucoside
selenium
shiitake mushroom
black ginger
soybean
sphaeranthus indicus
spinach
spirulina
stigmasterol
strawberry
sulforaphane glucosinolate
tocotrienols
tomato
trans-pterostilbene
tributyrin
triphala
turkey tail mushroom
Urolithin A
vegetable and fruit blend (proprietary)
vitamin A
vitamin B
vitamin C
vitamin D
vitamin D3
seaweed
wasabia japonica
watercress
wheat grass
whey protein
mulberry
zinc
red clover
yellow root
suma
jiaogulan
tangerine
typhonium
papaya
shen-chu
capsicum
neem tree
nut grass
alpinia galangal
commiphora
smilax
tinospora cordifolia
caesalpinia crista
rubia cordifolia
bee pollen
lingzhi
pau d'arco
morus
lemongrass
myrrh
root tuber
ferulic acid
chrysanthemum
cistanche
dodder
fern
ganoderma
morinda
zanthoxylum
royal jelly
Equol (proprietary)
polyphenols
purslane
coix
aster root
yerba mate
wheat germ
noni
biota seed
nopal
goji berry
paw paw
algae
indigo leaves
cocoa
AMP-activated protein kinase (AMPK)
cayenne pepper
soy isoflavones
ashitaba
soursop
15,16-Dihydrotanshinone I
3-(4-hydroxy-3-methoxyphenyl)prop-2-enoic acid
4-Hydroxyandrostenedione
8-Bromo-7-Methoxychrysin
Aralia
Arugula
Agarikon Mushroom
Alpha-Humulene
Amethoflavone
Amygdalin
Ankaflavin
Ardisia
Apigenin
Aronia melanocarpa
Allicin
Antrodia camphorata
Achyranthes
Auricularia
Anamu
American Pawpaw
Albizia
AHCC
Andrographolide
Avocado
Alpha-Methylselenobutanoic Acid
Amentoflavone
Acetogenin
Acacetin
Allophycocyanin
Alpha-Lipoic Acid
Astragaloside
Armillaria mellea
anthocyanidins
Andrographis
Adzuki bean
Ampelopsin
Asteracea
Allyl Mercaptan
Allyl Sulfide
Acemannan
Algal protein
allyl isothiocyanate
Alliin
anthocyanosides
Arabinoxylan
Abalone
Allium tuberosum
Alantolactone
Anti-aromatase
Arctiin
Arjunolic acid
Artepillin C
Astragalin
Atractylone
Bee Propolis
Black Seed
Baikal Skullcap
Bidens pilosa
bergenin
Betulinic acid
Breadnut
Brassica
Bayleaf
Bran
Butea monosperma
Black galingale
Beef liver
Bok Choy
Baicalein
Beta-lapachone
Bael
Bean
biochanin
Basidiomycota
Betanin
berry
Bauhinia
Boswellia
Brazil nut
Banyan
Butein
Barbasco
Bee products
Bombax
Borassus aethiopum
Butenyl isothiocyanate
Bacteria
Baobab
benzyl isothiocyanate
Baicalin
Buckwheat
Bassia scoparia
Bignay
Boerhavia diffusa
Caffeic Acid
Cumin
Camellia sinensis
Curry leaf
Caryophyllene
Cinnamomum
Chinese Mountain Ant
Cyanobacteria
Cucurbita
Condurango
Calycosin
Chlorophyllin
coconut oil
Cod Liver Oil
Coriolus mushroom
Carvacrol
Cynomorium
Capillary Artemisia
Cyanidin
chlorogenic acid
Chinese Fleeceflower
Curcuminoid
Citrus
Capsaicin
Cancerina
Cowherb
Cruciferous
Casticin
Curcumen
Chordaria cladosiphon
Centella asiatica
Cinnamic Acid
Chocolate
Chinese Ligustrum berry
Curcuma
Carnosol
Chalcone
C-Phycocyanin
Cabbage
Chirata
Carotene (unspecified)
Clostridium butyricum
Cinnamaldehyde
Corilagin
Coumaric acid
Crocetin
Cynaropicrin
Cytokines
Costus
Celastrus
Coprinus
Celosia
Capsanthin
Carnosic acid
Dunaliella salina
Docosahexaenoic Acid
Diallyl sulfide
Dihydrocapsaicin
Delphinidin
DNA
Dunaliella
Decursin
Dumontiaceae
Daidzein
Diosgenin
Didymin
Date
Dithiolthiones
Diosmetin
Dichrostachys glomerata
epicatechin
E-Viniferin
Ellagic Acid
Eclipta
Ergothioneine
Emblicanin
Eicosapentaenoic Acid
Ellagitannin
Ecklonia
Enokitake
Fiber
Flavonoids
Flavonones
Flammulina velutipes
Garlic
Galangal
Isoflavones
Lotus
Milk Protein
Periwinkle
Pistachio
Rhubarb
Soy Protein
walnut
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

Health Concerns

Brands

Evidence supporting the use of: Vitamin C
For the health condition: Cancer (prevention)

Table of Contents

Synopsis

Other ingredients used for Cancer (prevention)

Other health conditions supported by vitamin C

Products containing vitamin C

Health Concerns

Brands

Evidence supporting the use of: Vitamin CFor the health condition: Cancer (prevention)

Table of Contents

Synopsis

Other ingredients used for Cancer (prevention)

Other health conditions supported by vitamin C

Products containing vitamin C

Evidence supporting the use of: Vitamin C
For the health condition: Cancer (prevention)