Vitamin Deficiency Calculator
Screen common symptom and diet-risk patterns linked with possible vitamin or iron deficiency, compare likely overlaps, identify testing priorities, and review deeper results in one detailed mobile-friendly tool.
Inputs
Results
Best pattern match
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Top match level
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Second likely overlap
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Symptom count
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Risk factor count
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Neuro warning count
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Testing focus
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Food focus
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Urgency check
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Pattern check
Pattern match breakdown
| Nutrient / deficiency pattern | Symptom matches | Risk matches | Weighted score | Match level | Testing focus | Food focus |
|---|
Testing and action priorities
| Priority | Nutrient | Pattern level | Testing focus | Why it matters |
|---|
Overlap notes
Testing priority notes
Results appear after you click Calculate.
Guide
How to use this tool
- Select the symptoms that actually apply rather than checking everything possible.
- Add relevant diet and medical risk factors because many deficiencies are driven by intake or absorption problems.
- Use the top and second pattern matches as clues for what to discuss and test, not as a diagnosis.
- Review the testing focus row because the right blood test depends on which pattern looks strongest.
- Use the CSV if you want to save the symptom screen for later comparison or clinician discussion.
When extra care is needed
- You have pins and needles, balance problems, memory change, or vision symptoms.
- You are pregnant and also have symptoms or dietary restriction.
- You have marked fatigue, breathlessness, bleeding, weight loss, or persistent gastrointestinal symptoms.
- You have night blindness, severe muscle weakness, or symptoms that keep worsening.
- You have already been told you have anaemia, malabsorption, bowel disease, or prior stomach surgery.
Our vitamin deficiency calculator is a fast, privacy-first screening tool that helps you understand which vitamins might deserve attention based on your vitamin deficiency symptoms, diet pattern, sun exposure, and lifestyle/medical factors. If you were searching for a vitamin deficiency test online or a vitamin deficiency checker, you’re in the right place—this page explains how to use the calculator correctly, what your results mean, and what steps to discuss with your clinician next.
Important: A vitamin deficiency calculator does not diagnose disease. Only a qualified clinician can evaluate your situation, order tests (like vitamin D deficiency or vitamin B12 deficiency labs), and provide medical advice or treatment.
How our Vitamin Deficiency Calculator works (in simple steps)
- Add your details
Choose your diet (omnivore/vegetarian/vegan), sun exposure (a key driver for vitamin D deficiency), life stage (adults, older adults, pregnancy, breastfeeding), and any risk factors (e.g., gut absorption issues, metformin use, PPIs). - Tick symptoms
Select relevant vitamin deficiency symptoms like fatigue, easy bruising, mouth sores, night-vision issues, bone pain, tingling, dry skin, or hair thinning. You can search symptoms quickly. - Analyze
Click Analyze. The vitamin deficiency checker ranks vitamins (A, B-complex, C, D, E, K) by how strongly your inputs match known patterns. It also suggests food sources and a clinician discussion list (e.g., “consider 25-OH vitamin D test” for vitamin D deficiency, or “B12 ± MMA + CBC” for vitamin B12 deficiency). - Plan next steps
Bring the results to your clinician. If appropriate, they may order targeted labs, recommend dietary changes, or discuss supplements after checking interactions and your medical history.
Why trust this vitamin deficiency calculator? It’s rules-based, conservative, and runs entirely in your browser—no data leaves your device.
Who should use a vitamin deficiency calculator?
- People with persistent symptoms (fatigue, easy bruising, frequent infections, mouth ulcers, bone pain, tingling/numbness, hair thinning).
- Vegetarians/vegans who might be at higher risk for vitamin B12 deficiency (and sometimes vitamin D).
- Individuals with low sun exposure (indoors most of the day → higher risk of vitamin D deficiency).
- People with absorption risks (e.g., celiac disease, IBD, bariatric surgery) or on certain long-term medications (metformin → B12; PPIs → B12; anticonvulsants → D; isoniazid → B6; orlistat → fat-soluble vitamins A/D/E/K).
- Older adults (absorption changes can affect B12 and D).
- Pregnant or planning pregnancy (folate/B9 is essential; discuss prenatal supplementation with your clinician).
Top vitamin deficiency symptoms to know
While symptoms overlap, certain patterns commonly appear with specific vitamins:
- Vitamin A: night blindness, dry eyes, dry/scaly skin.
- Vitamin B12: fatigue, tingling/numbness in hands/feet, sore/smooth tongue, mouth sores; may affect mood and memory.
- Folate (B9): mouth sores, tongue changes, fatigue (overlaps with B12—clinicians often assess both).
- Vitamin B1/B2/B3/B6/B7: mouth cracks, dermatitis, rash around mouth/eyes/nose, neuropathy, low energy.
- Vitamin C: bleeding gums, easy bruising, slow wound healing, frequent infections.
- Vitamin D: bone pain, muscle weakness, recurrent illness; low sun exposure is a key risk.
- Vitamin E: rare; neurological symptoms over time.
- Vitamin K: easy bleeding, nosebleeds, prolonged clotting time (discuss urgently if severe).
If you experience severe symptoms (e.g., chest pain, sudden weakness, heavy bleeding), seek urgent care immediately.
What your results mean (and what they don’t mean)
- “High match” ≠ diagnosis. It means your inputs align with a pattern commonly associated with that vitamin.
- Talk to your clinician before starting supplements—especially if you take medicines (e.g., warfarin and vitamin K interactions).
- Consider lab tests where appropriate (e.g., 25-OH vitamin D for vitamin D deficiency, B12 ± MMA + CBC for vitamin B12 deficiency, folate/RBC folate, and others as advised).
Smart next steps after using the vitamin deficiency calculator
- Food-first approach
Try to improve intake from whole foods whenever possible:- Vitamin A: liver, eggs, dairy; orange/dark-green vegetables (carotenoids).
- B-complex: whole grains, legumes, meat/eggs/dairy, nuts and seeds, leafy greens.
- Vitamin C: citrus, berries, kiwifruit, peppers, broccoli.
- Vitamin D: safe sun exposure; fortified dairy/plant milks; fatty fish; eggs.
- Vitamin E: nuts, seeds, veg oils, spinach.
- Vitamin K: leafy greens (K1), some fermented foods/cheeses (K2).
- Check interactions
If you’re considering supplements, verify safety and interactions. (For prescription safety overall, our Prescription Checker and Pill Identifier can help you organize information to discuss with your clinician.) - Review your broader health
Combine insights with other tools:- Symptom Checker for a holistic view of what else might be going on.
- Diabetes Risk Assessment if fatigue or thirst/urination changes are present.
- BMI Calculator + BMR Calculator to plan sustainable nutrition.
- Medicine Dosage Calculator to understand general dosage math (not medical advice).
- Eye Vision Test if you’re noticing night vision issues (a possible vitamin A signal).
Why people search “vitamin deficiency test online” (and how to use this tool responsibly)
People want quick clarity when they feel off—especially with fatigue, frequent infections, or bruising. A vitamin deficiency test online sounds convenient, but most true assessments require clinical evaluation and lab testing. This vitamin deficiency calculator bridges the gap by organizing your signals (symptoms + risks) so you can have a clearer, faster conversation with your clinician.
Evidence-based, privacy-first approach
To keep your experience safe and trustworthy, this vitamin deficiency calculator follows conservative, widely taught associations and links to authoritative fact sheets for deeper reading:
- NIH ODS Vitamin Fact Sheets (Consumer):
- Vitamin D · Vitamin B12 · Folate (B9) · Vitamin C · Vitamin A · Vitamin K
- WHO/National guidelines may vary by country; speak to your local clinician for context.
All calculations are performed in your browser; we do not store your inputs.
When to talk to a clinician now
- Symptoms are severe, worsening, or persistent despite lifestyle changes
- New neurological signs (e.g., progressive tingling, weakness, coordination changes)
- Bleeding symptoms (e.g., frequent nosebleeds, gum bleeding, unusual bruising)
- Pregnancy, breastfeeding, chronic illness, or multiple medications
- Before starting any supplements—especially fat-soluble vitamins (A, D, E, K) which can accumulate
How to read common result patterns
- High Vitamin D match: Low sun + bone/muscle aches + frequent illness → discuss 25-OH vitamin D test; consider fortified foods and safe sun.
- High Vitamin B12 match: Vegan/vegetarian pattern or metformin/PPI use + tingling, mouth changes, fatigue → discuss B12 ± MMA and CBC; review diet/fortified foods.
- Vitamin C signals: Bleeding gums, easy bruising, slow wound healing → review produce intake; ask if vitamin C assessment is appropriate.
- Vitamin K signals: Easy bleeding, nosebleeds, prolonged clotting → urgent clinical discussion, especially if on anticoagulants.
Your clinician might also look at minerals (e.g., iron) and other conditions that can mimic a “vitamin deficiency symptoms” pattern—another reason labs and professional evaluation matter.
How to use this vitamin deficiency checker effectively (quick guide)
- Open the vitamin deficiency calculator above.
- Enter your diet pattern, sun exposure, life stage, and any risk factors.
- Tick all relevant vitamin deficiency symptoms.
- Click Analyze to see your matches.
- Read the “Why this matched” reasons and “What to discuss” suggestions.
- Consider sharing the results with your clinician for a personalized plan and, if appropriate, lab testing.
Related tools on My Medicine Advisor
- Symptom Checker
- Prescription Checker
- Pill Identifier
- Medicine Dosage Calculator
- Diabetes Risk Assessment Tool
- BMI Calculator · BMR Calculator
- Eye Vision Test
- Pregnancy Due Date Calculator
- Asthma Control Test (ACT)
- Kidney Health Checker
- Skin Type Analyzer
FAQs — Vitamin Deficiency Calculator
A vitamin deficiency calculator is a smart starting point—not the final answer. Use your results to ask better questions, fine-tune your diet, and collaborate with a clinician on testing and safe supplementation. If you want a broader perspective on your symptoms, try our Symptom Checker next, and build your overall plan with the BMI and BMR tools.
About this content
How this article was put together: researched from recognised health sources, drafted with the help of AI tools, and edited by hand, with sources linked throughout.
Sameer Patel is the founder and editor of My Medicine Advisor. He is not a doctor or medical professional — before starting this site he worked in banking,…
Medical disclaimer
The content on MyMedicineAdvisor is provided for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Health information on this website should not be used to diagnose, treat, cure, or prevent any condition without guidance from a qualified healthcare professional. Always seek the advice of your doctor, physician, or another licensed healthcare provider with any questions you may have regarding a medical condition, symptoms, medications, or treatment decisions.
