Why is there an "L" next to my vitamin D results?
Last updated July 27, 2026
Seeing an "L" next to your vitamin D result?
It stands for "Low", indicating that the value falls below the reference range (30–100 ng/mL). In this case, the unit of measurement is still ng/mL, but the "L" serves as an alert to highlight that the value is low, signaling a deficiency. Here's an example:
Low vitamin D can affect everything from your mood to your bone health, so it’s worth taking it seriously.
If you're in the low range, it might be a good idea to consult your healthcare provider or nutritionist for some guidance on boosting your levels. This could be through supplements, changes in your meals, or even a little more sunshine (depending on your location and climate, of course).
