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
Measures variation in red blood cell size — broader distribution suggests mixed cell populations (recovering from anemia, dual deficiencies, hemolysis, marrow stress). RDW is a SENSITIVE early marker: it rises before MCV shifts and before hemoglobin drops, so an elevated RDW with otherwise-normal CBC can be the earliest detectable signal of iron or B12 deficiency. Some research links elevated RDW to all-cause mortality independent of anemia — it's a general marker of physiologic stress. No direct peptide effects in common stacks. KEY INTERPRETATION: rising RDW over serial readings is more informative than a single value.
Have a recent RDW (red cell distribution width) 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.