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Test de Carence en Vitamine D — Outil en ligne gratuit

Symptômes + facteurs de risque — probabilité de carence en vitamine D

Dépistage gratuit du risque de carence en vitamine D. Guidelines Holick 2024 + Endocrine Society. Éducatif uniquement — confirme avec test sanguin 25-OH-D.

Risk factors

Symptoms (last 3 months)

☀️ Vitamin D Deficiency Risk · Truth Series
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En savoir plus

Vitamin D Deficiency Self-Test

Sources: Holick 2024 review, Endocrine Society guidelines, NIH Office of Dietary Supplements, NHS recommendations. Educational risk screen — confirm with a 25-OH-D blood test.

How to use this tool

  1. 1

    Risk factors

    Latitude, skin tone, indoor work, age.

  2. 2

    Symptoms

    Fatigue, low mood, bone aches, frequent infections.

  3. 3

    See likelihood

    Low / moderate / high — confirm with blood test.

Frequently Asked Questions

How common is Vitamin D deficiency?
Very common. Holick 2024: ~40% of US adults deficient (<20 ng/mL), ~70% sub-optimal (<30 ng/mL). Higher in Nonrthern Europe (50-60% deficient in winter), darker skin tones (4-6× higher rates), older adults (skin produces less D), indoor workers, those who use sunscreen daily. The pandemic indoor-shift made it worse.
Why does Vitamin D matter?
It's a hormone, not just a vitamin. Roles: bone mineralization (rickets / osteomalacia / osteoporosis), immune modulation (upper respiratory infection rates), mood regulation (winter depression), insulin sensitivity, autoimmune disease risk. Endocrine Society 2024: optimal 30-50 ng/mL. Severe deficiency (<12 ng/mL) is a real medical condition.
How do I confirm + treat?
Blood test: 25-hydroxy-vitamin-D (25-OH-D). Available at GP or via lab services like Quest, LabCorp, EU equivalents (~$30-60 out of pocket). Treatment: D3 1000-4000 IU/day for maintenance, 50,000 IU/wk × 8 wks for severe deficiency (under medical guidance). Take with fat-containing meal. Re-test in 3 months.
Can I just take a supplement?
Yes, mostly. D3 (cholecalciferol) 1000-2000 IU/day is safe for nearly all adults. Coût ~$3-10/month. But: fat-soluble = it can build up. Don't mega-dose without testing. If symptoms persist after 3 months of supplementation, see a GP — could be other deficiencies (B12, iron, thyroid) mimicking D-deficiency symptoms.

À retenir

  • Vitamin D Deficiency Self-Test is a free, browser-based calculator tool — symptoms + risk factors — likelihood you're d-deficient.
  • Non signup, no downloads, no file uploads. Outils run in your browser; the few that need an outside service say so on the page.
  • Works on desktop, tablet, and mobile. Install as a PWA for offline access.

How to Use Vitamin D Deficiency Self-Test

  1. Open the tool: Launch Vitamin D Deficiency Self-Test on Outilolis — no account or download needed.
  2. Enter your data: Paste text, enter values, or select a file directly in your browser.
  3. Get instant results: Everything is processed locally — results appear immediately.
  4. Copy or download: Save your output or share it. Bookmark for quick access next time.

Vitamin D Deficiency Self-Test — Quick Facts

Prix
Gratuit — sans limites, sans filigrane, sans paywall
Confidentialité
Traité dans votre navigateur. Les outils qui ont besoin d’un service externe l’indiquent sur la page. Les visites sont comptabilisées (Google Analytics).
Plateforme
Tout navigateur moderne — desktop, tablette ou mobile
Catégorie
Calculateur Outils on Outilolis
Hors ligne
Works offline after first visit (Progressive Web App)
CaractéristiqueDétails
OutilVitamin D Deficiency Self-Test
CatégorieCalculateur
Inscription requiseNon
Téléversement de fichierAucun — traité dans le navigateur
Compatible mobileEntièrement adaptatif
CoûtGratuit pour toujours

Why Use Vitamin D Deficiency Self-Test?

You should try Vitamin D Deficiency Self-Test for a quick, private way to symptoms + risk factors — likelihood you're d-deficient. Processing happens in your browser and files are never uploaded; the few tools that need an outside service say so on the page.

On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.

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100% Confidentialité. Cet outil fonctionne entièrement dans votre navigateur. Vos données ne sont jamais envoyées à un serveur.