What is the recommended dosage for Vitamin D?

General: 600-2,000 IU/day; Deficiency Correction: 4,000-5,000 IU/day

What are the side effects of Vitamin D?

Potential side effects include: Hypercalcemia at very high doses, Nausea and vomiting, Kidney stones (rare, high doses), Weakness and fatigue.

Vitamin D is a fat-soluble vitamin and neurosteroid hormone that plays a role in brain development and function. Vitamin D receptors are widely distributed throughout the brain. Research has associated low vitamin D status with increased risk of cognitive concerns, particularly in older adults.

What dosage of Vitamin D has been used in cognitive studies?

Cognitive studies have used 800 IU to 4,000 IU of vitamin D3 (cholecalciferol) daily. Some studies have targeted specific serum 25(OH)D levels, typically above 30 ng/mL. The tolerable upper intake is 4,000 IU per day for adults. Consult your healthcare provider and consider testing your levels.

What are the potential side effects of Vitamin D?

Vitamin D toxicity is rare but can occur with prolonged intake above 10,000 IU per day, causing hypercalcemia with symptoms including nausea, weakness, and kidney problems. Vitamin D may interact with certain heart and kidney medications. Consult your healthcare provider for appropriate dosing.

Vitamin D
Vitamin D

vitamin

Aussi connu sous le nom de: Vitamin D3, Cholecalciferol, Calciferol, Ergocalciferol (D2)

𝕏 LinkedIn

<\/script>\n

`; }, get iframeSnippet() { const domain = 'braincited.com'; const params = 'ingredient\u003Dvitamin\u002Dd'; return ``; }, get activeSnippet() { return this.method === 'script' ? this.scriptSnippet : this.iframeSnippet; }, copySnippet() { navigator.clipboard.writeText(this.activeSnippet).then(() => { this.copied = true; setTimeout(() => { this.copied = false; }, 2000); }); } }" @keydown.escape.window="open = false" @click.outside="open = false">

Embed This Widget

Style

Widget powered by . Free, no account required.

About

Vitamin D is a neurosteroid hormone with receptors throughout the brain, particularly in the hippocampus and cerebral cortex. Deficiency, which affects 40% of geriatric memory clinic patients, is identified as a critical risk factor for cognitive decline. Supplementation supports calcium signaling in neurons, neurotrophic factor expression, and protection against oxidative stress and inflammation.

How It Works

Neurosteroid hormone with receptors in the hippocampus and cerebral cortex; supports calcium signaling in neurons, neurotrophic factor expression, neurotransmitter synthesis, and neuronal protection against oxidative stress and inflammation.

Evidence For Conditions

Pathologie	Note	Études	Participants
Nutritional Deficiency Cognitive Impairment	B	20	4500	Voir →
Depression-Related Cognitive Dysfunction	C	12	2000	Voir →

Side Effects

Hypercalcemia at very high doses
Nausea and vomiting
Kidney stones (rare, high doses)
Weakness and fatigue

Drug & Supplement Interactions

Corticosteroids (reduce calcium absorption)
Statins (both affect cholesterol pathways)
Thiazide diuretics (additive calcium retention)
Weight loss drugs (may reduce vitamin D absorption)

Informez toujours votre professionnel de santé de tous les compléments alimentaires que vous prenez.Informez toujours votre professionnel de santé de tous les compléments que vous prenez.

Related Ingredients

Vitamin B6 Vitamin E Niacin Vitamin B12 Folate

En bref

Posologie: General: 600-2,000 IU/day; Deficiency_Correction: 4,000-5,000 IU/day
Formes: softgel capsule tablet drops gummy
Sources naturelles: Sunlight, Fatty fish, Fortified milk, Egg yolks, Mushrooms
Limite supérieure: 4,000 IU/day (IOM); 10,000 IU/day (Endocrine Society upper safety)
Meilleur moment: With meals containing fat; morning preferred

Synthèse des preuves

Nutritional Deficiency Cognitive Impairment B

Depression-Related Cognitive Dysfunction C

Avertissement FDA: Ces déclarations n'ont pas été évaluées par la Food and Drug Administration. Les produits et informations sur ce site ne sont pas destinés à diagnostiquer, traiter, guérir ou prévenir quelque maladie que ce soit. Les notes de preuve présentées sont basées sur notre analyse de la recherche publiée et évaluée par des pairs et ne constituent pas un avis médical. Consultez toujours votre professionnel de santé avant de commencer tout régime de compléments alimentaires.