What is the recommended dosage for Vitamin D?

General: 600-800 IU/day (RDA); Ibd Support: 1,000-4,000 IU/day (target serum 25(OH)D >30 ng/mL); Deficiency Correction: 50,000 IU/week for 8 weeks, then 1,000-4,000 IU/day maintenance

What are the side effects of Vitamin D?

Potential side effects include: Hypercalcemia at very high doses (nausea, vomiting, weakness, confusion), Kidney stones with excessive long-term supplementation, Constipation, Metallic taste.

What is vitamin D and how does it work for gut health?

Vitamin D is a fat-soluble vitamin and hormone that plays a significant role in intestinal health beyond its well-known function in calcium absorption. It helps maintain the integrity of tight junctions between intestinal epithelial cells, modulates gut immune responses, and influences the composition of the gut microbiome. Research suggests that vitamin D deficiency is associated with increased risk of inflammatory bowel disease and other GI conditions.

What is the recommended dosage of vitamin D for gut health?

The standard recommendation is 600-800 IU per day, but many researchers suggest 1,000-4,000 IU daily for optimal levels, especially in individuals with deficiency. Studies in IBD patients have used 1,000-5,000 IU per day. Blood levels of 25(OH)D between 30-50 ng/mL are generally considered optimal. Testing vitamin D levels before supplementing can help determine the appropriate dose.

Are there side effects or interactions with vitamin D?

Vitamin D is safe at recommended doses but can cause toxicity at excessive levels (typically above 10,000 IU per day over extended periods), leading to hypercalcemia, kidney stones, and nausea. Vitamin D may interact with thiazide diuretics, corticosteroids, and certain weight loss medications that reduce fat absorption. Individuals with granulomatous diseases (sarcoidosis) may be more susceptible to vitamin D-induced hypercalcemia.

Vitamin D
Vitamin D

vitamin

Auch bekannt als: Cholecalciferol, Vitamin D3, Ergocalciferol, Calciferol

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About

Vitamin D bindet an VDR-Rezeptoren auf intestinalen Epithelzellen, kann die Expression von Tight-Junction-Proteinen fördern und die mukosale Immunantwort unterstützen. Ein Mangel tritt bei bis zu 60 % der Patienten mit entzündlichen Darmerkrankungen auf und korreliert mit der Krankheitsaktivität. Studien legen nahe, dass eine Vitamin-D-Supplementierung das Rückfallrisiko bei Colitis ulcerosa und Morbus Crohn reduzieren und die Darmgesundheit unterstützen kann.

How It Works

Binds VDR receptors on intestinal epithelial cells enhancing tight junction protein expression (claudin-2, -12, -15); modulates mucosal immune response via regulatory T cell differentiation; induces cathelicidin antimicrobial peptide production in intestinal macrophages; deficiency associated with IBD relapse and increased intestinal permeability.

Evidence For Conditions

Beschwerde	Bewertung	Studien	Teilnehmer
Inflammatory Bowel Disease (IBD) — General	B	10	1500	Ansehen →
Irritable Bowel Syndrome (IBS)	C	3	400	Ansehen →

Side Effects

Hypercalcemia at very high doses (nausea, vomiting, weakness, confusion)
Kidney stones with excessive long-term supplementation
Constipation
Metallic taste

Drug & Supplement Interactions

Thiazide diuretics (may increase risk of hypercalcemia)
Corticosteroids (reduce vitamin D absorption and metabolism)
Orlistat and cholestyramine (reduce fat-soluble vitamin absorption)
Statins (vitamin D may affect statin metabolism)

Informieren Sie immer Ihren Arzt über alle Nahrungsergänzungsmittel, die Sie einnehmen.Informieren Sie immer Ihren Arzt über alle Nahrungsergänzungsmittel, die Sie einnehmen.

Related Ingredients

Vitamin A

Kurzinformationen

Dosierung: General: 600-800 IU/day (RDA); Ibd_Support: 1,000-4,000 IU/day (target serum 25(OH)D >30 ng/mL); Deficiency_Correction: 50,000 IU/week for 8 weeks, then 1,000-4,000 IU/day maintenance
Darreichungsformen: capsule softgel liquid drops tablet gummy
Natürliche Quellen: Sunlight (UV-B exposure), Fatty fish (salmon, mackerel, sardines), Egg yolks, Fortified milk and dairy, Mushrooms (UV-exposed)
Obergrenze: 4,000 IU/day (100 mcg); higher doses under medical supervision only
Beste Einnahmezeit: With a meal containing fat for better absorption

Evidenzzusammenfassung

Inflammatory Bowel Disease (IBD) — General B

Irritable Bowel Syndrome (IBS) C

FDA-Haftungsausschluss: Diese Aussagen wurden nicht von der Food and Drug Administration bewertet. Die Produkte und Informationen auf dieser Website sind nicht dazu bestimmt, Krankheiten zu diagnostizieren, zu behandeln, zu heilen oder zu verhindern. Die dargestellten Evidenzbewertungen basieren auf unserer Analyse veröffentlichter begutachteter Forschung und stellen keine medizinische Beratung dar. Konsultieren Sie immer Ihren Arzt, bevor Sie mit der Einnahme von Nahrungsergänzungsmitteln beginnen.