| Rank | Lab Test | Symptom Indicator | The "Why" | Interfering Meds |
| 1 | Free T (Calculated) | Hirsutism (excess facial hair), cystic acne, or low libido. | The "Active" Fuel: Measures the hormone hitting your cells and causing physical symptoms. | Spironolactone, Ketoconazole, NSAIDs (chronic). |
| 2 | SHBG | Scalp hair thinning or "normal" labs but feeling highly symptomatic. | The Thief: Binds to testosterone. If high, you can't use your T; if low, you have too much "free" T. | Birth Control Pills, Oral Estrogen, Anti-convulsants. |
| 3 | Estradiol (E2) | Hot flashes, night sweats, or significant mood swings. | The Regulator: Controls SHBG production in the liver. Essential to see the Androgen/Estrogen balance. | Birth Control, Oral HRT, Soy Isoflavones. |
| 4 | DHEA-S | Mid-section weight gain, chronic fatigue, or stress-induced acne. | The Raw Material: Shows if the adrenal glands (not just ovaries) are overproducing androgens. | Corticosteroids (Prednisone), Opioids, Metformin. |
| 5 | LH & FSH | Irregular periods, skipped cycles, or infertility concerns. | The Manager: Brain-to-ovary signals. Used to identify PCOS or Early Menopause. | Opioids, Hormonal Contraceptives, GnRH agonists. |
| 6 | Total Testosterone | General screening for hormonal health. | The Output: The total amount produced. Can be misleading if SHBG is high or low. | Glucocorticoids, Opioids. |
| 7 | TSH / Free T3 | Cold intolerance, brittle hair, brain fog, or weight fluctuations. | The Metabolic Rate: Thyroid issues can skyrocket SHBG, effectively "ghosting" your testosterone. | Lithium, Amiodarone, Biotin (stop 72hrs before). |
| 8 | Prolactin | Nipple discharge, persistent headaches, or total loss of period. | The Interrupter: High levels act as a "kill switch" for the entire reproductive system. | SSRIs (Antidepressants), Antipsychotics, Reglan. |
| 9 | ALT / SGPT | Pain in upper right abdomen, yellowing of skin, or easy bruising. | The Factory: Liver health affects SHBG and hormone processing. Liver stress disrupts the whole profile. | Statins, NSAIDs, Acetaminophen. |
| 10 | Fasting Insulin | Sugar cravings, "dark patches" of skin, or difficulty losing weight. | The Metabolism: High insulin often lowers SHBG, which is a primary driver of PCOS symptoms. | Steroids, Diuretics. |