Mediki
Vitamin D and B12 tracker: follow your vitamin levels over time
Vitamin levels move with the seasons, your diet and any supplements you take. Mediki charts vitamin D, B12 and folate from every lab report, so you can see how they respond.
Vitamin tests you can track
- Vitamin D (25-OH)25-OH vitamin D measures the main circulating form of vitamin D and reflects overall vitamin D status.
- Vitamin B12Vitamin B12 measures a vitamin needed for red blood cell formation and nervous system function.
- Folate (Vitamin B9)Folate measures vitamin B9 status, which is important for DNA synthesis and red blood cell production.
- HomocysteineHomocysteine measures an amino acid linked to methylation pathways and vascular health.
- CalciumCalcium measures a mineral needed for bones, muscle contraction, nerve signaling, and clotting.
Vitamin D changes with the seasons
Vitamin D (25-OH) is the usual blood test for vitamin D status. Your skin makes vitamin D from sunlight, so levels are often lower after months with less sun. Results laid out by date make seasonal patterns and the effect of supplements easy to see.
Vitamin units differ between labs
- Vitamin D: 1 ng/mL = 2.496 nmol/L
- Vitamin B12: 1 pg/mL = 0.7378 pmol/L
Mediki converts these automatically. Try the blood test unit converter for a single value.
B12, folate and homocysteine
Vitamin B12 and folate are often tested together, sometimes with homocysteine. Put them in one group in Mediki to follow them side by side.
Track your vitamin levels in one chart
Upload your lab reports as PDFs or photos. Mediki reads every value, converts units and charts each marker against its reference range. Your first 15 pages are free.
Try 15 pages freeFrequently asked questions
How do I convert vitamin D from ng/mL to nmol/L?
Multiply the ng/mL value by about 2.5. For example, 30 ng/mL is about 75 nmol/L. To go the other way, divide nmol/L by about 2.5.
Why is my vitamin D lower in winter?
Your skin makes vitamin D from sunlight, so levels are often lower in months with less sun. Seeing your results by date makes that pattern visible.
Can I track B12 and folate together?
Yes. Create a group with vitamin B12, folate and homocysteine to see them on one screen.
Medical disclaimer: This page is general information, not medical advice. Reference ranges differ between laboratories, and only a doctor can interpret your results in the context of your health.