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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 — your data stays on your device.
  • 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
100% dans le navigateur — aucune donnée n’est envoyée à un serveur
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. All processing happens in your browser. Your files and data never leave your device. According to web.dev, client-side processing is the gold standard for privacy.

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.