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
Sensitive marker for biliary/hepatobiliary disease, alcohol use, and certain medications (anticonvulsants, NSAIDs). Most useful as the third hepatic enzyme alongside ALT + AST to distinguish hepatocellular injury (ALT/AST up, GGT normal) from cholestatic/alcohol patterns (GGT and ALP up). No direct peptide effects in common stacks. AAS use (NOT peptides, common co-use) frequently elevates GGT alongside ALT/AST. KEY CONFOUNDERS: alcohol in last 2-4 weeks is the dominant signal; chronic drinkers run high baselines that take weeks to normalize after stopping.
Have a recent GGT (gamma-glutamyl transferase) 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.