Pregnenolone is a steroid the body makes from cholesterol that also acts in the brain; levels fall with age. Human evidence comes mainly from short studies in specific medical groups, showing small or mixed benefits for pain, mood, and brain function. For healthy adults seeking longevity it is unproven, long-term safety is unstudied, and hormone-sensitive conditions raise real concerns. (Full Review)
| Marker | Target | Why |
|---|---|---|
| DHEA-sulfate (DHEA-S) | Mid-to-upper youthful range for age and sex | Tracks the main downstream steroid pregnenolone feeds |
| Total & free testosterone | Sex- and age-appropriate optimal range | Detects androgenic over-stimulation (acne, irritability) |
| Estradiol | Sex- and age-appropriate range | Detects estrogenic over-stimulation; key safety marker in women and in men prone to high aromatization |
| Progesterone | Sex- and stage-appropriate range | Pregnenolone is a direct progesterone precursor |
| Pregnenolone (serum) | Youthful-range target if "replacement" is the goal | Confirms absorption and informs dose titration |
| Cortisol (AM) | Normal diagnostic morning range | Pregnenolone sits upstream of cortisol; screens for disruption of the stress-hormone axis |
| Lipid panel | Optimal cardiometabolic range (beyond standard "normal") | Hormone shifts can affect lipids over time |
Cadence: Baseline, then 8–12 weeks after starting, then every 6–12 months during continued use, with earlier checks if symptoms or side effects emerge.