Q&A with Dr. Scottie: From Microdose Lithium to the Nitric Oxide and Testosterone Link
Six member questions shaped this week's Dr. Scottie session, each opening a different mechanism worth understanding.
It began with lithium: a member raised microdose research arguing most diets are lithium-deficient, that close to 300 neurological processes depend on the mineral, and that lithium levels in local water supplies track with lower suicide rates. Dr. Scottie placed it on the growing longevity list and promised a deeper dive and full revisit on next week's show.
Testosterone came next: the specific supplements he named for older men, and why every nitric oxide supplement pulls double duty, since raising nitric oxide also raises testosterone secretion and the reverse holds as well. He also walked through his clinic workup: the two labs he orders and the decade-of-life nomogram he targets instead of the bare minimum range.
From there, brain health. A member brought published research on citicoline, lutein, and zeaxanthin, including a meta-analysis showing measurable cognitive score improvement in mild cognitive impairment. Dr. Scottie agreed, listed his nutrients for blood flow to the brain, and named the one intervention that outperforms every supplement for cognition.
The session closed with two clinical frameworks: how he approaches a teenager who stopped menstruating, and how he manages elevated hematocrit and polycythemia vera, a condition he has dealt with personally.
This session was recorded on September 14, 2026.
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