Skip to content
All biomarkers
Hematology / CBC

Hematocrit (HCT)

Measured in % · LOINC 4544-3

Reference ranges

Optimal
4150 %
functional-medicine target
Standard
38.850 %
lab reference range

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

Percentage of blood volume occupied by red blood cells; tightly correlated with hemoglobin (HCT ≈ HGB × 3). Same peptide interactions as hemoglobin — TRT and AAS reliably raise HCT; values >52% in men or >48% in women often trigger therapeutic phlebotomy on TRT to reduce stroke risk. CJC-1295 / Ipamorelin: minimal effect. KEY CAVEAT: dehydration acutely raises HCT 2-5% — interpret in context of hydration status. Smoking chronically raises HCT (hypoxic stimulus). RANGES SHOWN ARE FOR ADULT MEN; women typically 34.9-44.5%.

Have a recent Hematocrit (HCT) 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.