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
The thyroid's primary output; converted to active T3 peripherally. Read with TSH for thyroid status: high T4 + low TSH = hyperthyroidism; low T4 + high TSH = primary hypothyroidism; low T4 + low TSH = central / pituitary hypothyroidism (rare). No direct peptide effects in common stacks. Exogenous T4 (levothyroxine) elevates free T4 and suppresses TSH. CJC-1295 + Ipamorelin: no documented thyroid axis effect.
Have a recent Free T4 (free thyroxine) 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.