Bloodwork Analyzer: What Your Lab Results Mean for Supplements (2026)
How it works: Enter your blood test values below. We'll identify which are out of range and recommend specific, evidence-based supplements to address deficiencies — with exact doses, retest timelines, and best-value products with cost per day.
Enter Your Lab Values
Enter any values you have. Leave fields blank for tests you haven't had. Hover or tap the ? icon for details about each test.
Frequently Asked Questions
How do I read my blood test results for supplements?
Compare each value to the reference range on your lab report. For supplements, focus on vitamin D (25-hydroxyvitamin D), vitamin B12, ferritin (iron stores), folate, and magnesium. Values below the optimal range may benefit from targeted supplementation. Our bloodwork analyzer interprets your values and recommends specific supplements with clinical doses.
What blood tests should I get to know which supplements to take?
The most useful blood tests for supplement decisions are: 25-hydroxyvitamin D (vitamin D status), serum B12, ferritin (iron stores — more useful than serum iron), serum folate, serum magnesium, TSH (thyroid), and HbA1c (blood sugar). Ask your doctor for a comprehensive metabolic panel plus these specific tests.
What vitamin D level is too low?
Below 20 ng/mL is deficient (supplement with 5000 IU/day for 8-12 weeks). Between 20-30 ng/mL is insufficient (supplement with 2000-4000 IU/day). The optimal range is 30-80 ng/mL. Above 150 ng/mL is potentially toxic — stop supplementation and see your doctor.
What ferritin level indicates I need iron supplements?
Ferritin below 12 ng/mL is depleted and requires immediate supplementation. Below 30 ng/mL is low and may benefit from supplementation, especially if you have symptoms like fatigue, hair loss, or restless legs. Do NOT supplement iron if ferritin is above 150 ng/mL. Iron bisglycinate is better absorbed with fewer side effects than ferrous sulfate.
Can I use this tool instead of seeing a doctor?
No. This tool interprets lab values for supplement context only. It is NOT a diagnostic tool and cannot replace medical advice. Always discuss your lab results with your healthcare provider, especially for values in the critical or caution range. Some out-of-range values require medical treatment, not supplements.
Related Tools
- Personal Supplement Stack Builder — Recommendations based on age, medications, and goals
- Supplement Audit Tool — Check what you're already taking
- Vitamin D Calculator — Location-based dose recommendations