Reference ranges
Optimal ranges are tighter than standard lab ranges and reflect functional-medicine targets, not the populations they were derived from. Reference bands depend on sex, age, and circumstance — Juno's lab analysis layers your profile context onto the printed range when you paste a value.
Peptide relevance
Stores body iron AND functions as an acute-phase reactant — elevated ferritin can mean iron overload OR inflammation, and the two situations need totally different responses. Read alongside transferrin saturation and hs-CRP to disentangle. Low ferritin (<30 ng/mL) is the most sensitive marker for early iron deficiency, often present before hemoglobin drops. Female users in menstruating years frequently run low without realizing. No direct peptide effects in common stacks. INTERPRETATION: optimal range above assumes the user is not iron-loaded; users with hereditary hemochromatosis or chronic transfusion targets are different. Track alongside saturation when iron status matters.
Have a recent Ferritin value?
Paste it on the lab analysis page. Juno reads your active stack + (if shared) your medications and conditions, and surfaces plausible contributors with citations. Doesn't diagnose.
Sign-in required. The analysis is saved to your private history and audit-logged.