Evidence supporting the use of: Vitamin D
For the health condition: Irritable Bowel Syndrome

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Synopsis

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

Vitamin D has garnered scientific interest as a potential adjunct in the management of Irritable Bowel Syndrome (IBS), largely due to its immunomodulatory effects and its role in gut barrier function. Several observational studies have reported a higher prevalence of vitamin D deficiency among individuals with IBS compared to healthy controls. A few small-scale randomized controlled trials (RCTs) have explored whether vitamin D supplementation improves IBS symptoms, with mixed results. Some studies have found that supplementation leads to a reduction in symptom severity and improvement in quality of life, while others have not observed significant benefits.

The proposed mechanisms include vitamin D’s ability to modulate immune responses, reduce inflammation, and influence gut microbiota composition. Additionally, vitamin D receptors are expressed throughout the gastrointestinal tract, suggesting a potential direct effect on intestinal function.

However, the overall quality and size of existing studies are limited. Meta-analyses and systematic reviews generally conclude that there is some evidence for benefit but that the evidence is not robust or consistent enough to recommend routine use of vitamin D specifically for IBS symptom management in the absence of an underlying deficiency. As a result, while there is scientific rationale and preliminary data supporting its use, the evidence is currently modest (rating 2/5), and vitamin D supplementation for IBS should be considered on an individual basis, particularly in those with confirmed deficiency.

More about vitamin D
More about Irritable Bowel Syndrome

Other ingredients used for Irritable Bowel Syndrome

2'-Fucosyllactose
akkermansia muciniphila
aloe vera
alpha-galactosidase
alpha-pinene
amino acids
bacillus clausii
bacillus coagulans
bacillus subtilis
benegut perilla (proprietary)
beta caryophyllene
bifidobacterium bifidum
bifidobacterium breve
bifidobacterium infantis
bifidobacterium lactis
bifidobacterium longum
bilberry
bio ecolian (proprietary)
blackberry
Indian frankincense
butyrate triglyceride
chen pi
chia seed
chlorella
cinnamon
turmeric
curcumin
fennel
flaxseed
fructooligosaccharides (FOS)
fruit and vegetable blend (proprietary)
ginger
green banana
green tea
guar gum
cellulose
inulin
isomalto-oligosaccharide
l-glutamine
lactobacillus acidophilus
lactobacillus brevis
lactobacillus bulgaricus
lactobacillus casei
lactobacillus fermentum
lactobacillus gasseri
lactobacillus helveticus
lactobacillus paracasei
lactiplantibacillus plantarum
lactobacillus reuteri
lactobacillus rhamnosus
lactobacillus salivarius
lactococcus lactis
lovage
marshmallow
oat
pectin
peppermint oil
plum fruit
pomegranate
potato starch
butyric acid
psyllium
quercetin
resveratrol
saccharomyces boulardii
slippery elm bark
spearmint leaf
streptococcus thermophilus
tributyrin
vitamin D
xylooligosaccharides
zinc
hyssop
atractylodes
ferula assafoetida
anise
holarrhena antidysenterica
fumaria parviflora
chrysanthemum
senna
white oak
algae
Agastache
Asafoetida
Alexandrian senna
Agrimonia pilosa
Betony
Bifidobacterium
Bacillus indicus
Bifidobacterium adolescentis
Boswellic Acid
Bayleaf
Belleric myrobalan
Bran
Boswellia
Bacillus licheniformis
black salt
Bifidobacterium animalis
Bitter principals
Bacteria
Bifidobacteria
Bacillus
Cumin
Coriander
Citron
Cannabidiol
Clerodendrum indicum
Dragonhead
Dichrostachys glomerata
Enterococcus
Enzyme Blend
Fig
Fiber
Quince
Rhubarb

Other health conditions supported by vitamin D

Acne
Allergies (food)
Allergies (respiratory)
Alzheimer's Disease
Amenorrhea
Anemia
Anorexia
Apathy
Arrhythmia
Arteriosclerosis
Arthritis
Asthma
Autism
Autoimmune Disorders
Backache
Birth Defects (prevention)
Body Building
Broken Bones
Calcium Deficiency
Cancer (natural therapy for)
Cancer (prevention)
Cancer Treatment (reducing side effects)
Cardiovascular Disease
Celiac Disease
Chronic Obstructive Pulmonary Disorder
Colds (antiviral)
Colds (general)
Colds (prevention)
Colds (with fever)
Concentration (poor)
Concussions
Confusion
Congestive Heart Failure
Contagious Diseases
Convalescence
Convulsions
Cramps (menstrual)
Cramps and Spasms
Crohn's Disease
Cystic Breast Disease
Cystic Fibrosis
Dandruff
Debility
Dementia
Depression
Dermatitis
Diabetes
Diabetic Retinopathy
Erectile Dysfunction
Estrogen (low)
Fatigue
Fibroids (uterine)
Fibromyalgia Syndrome
Fibrosis
Grave's Disease
Grief and Sadness
Hair (loss or thinning)
Hair Care (general)
Hashimoto's Disease
Headache (cluster)
Heart (weakness)
Hypertension
Hypothyroid
Infection
Infection (bacterial)
Infection (viral)
Infertility
Inflammation
Inflammatory Bowel Disorders
Influenza
Injuries
Irritable Bowel Syndrome
Itching
Knees (weak)
Leaky Gut Syndrome
Leprosy
Lesions
Leukemia
Lou Gehrig's Disease
Lupus
Lymphoma
Melanoma
Memory and Brain Function
Menopause
Menstrual Irregularity
Mental Illness
Metabolic Syndrome
Migraine
Miscarriage (prevention)
Mood Swings
Multiple Sclerosis
Muscle Tone (lack of)
Muscular Dystrophy
Myasthenia Gravis
Nephritis
Nerve Damage
Nervous Exhaustion
Numbness
Nursing
Obsessive Compulsive Disorder
Oral Surgery
Osteoporosis
Pain (general remedies for)
Pancreatitis
Paralysis
Parkinson's Disease
Peripheral Neuropathy
PMS (general)
PMS Type D
PMS Type H
PMS Type P
PMS Type S
Pneumonia
Polyps
Post Partum Depression
Post Partum Weakness
Pregnancy (herbs and supplements for)
Progesterone (low)
Prostatitis
Psoriasis
Rheumatoid Arthritis
Schizophrenia
Sciatica
Seasonal Affective Disorder
Senility
Tuberculosis