Dr. Allan Purdy’s review of my new book

Vitamin D deficiency is common, often missed, and easy to correct. In this post I explain why “normal” lab values can be misleading, how vitamin D affects headaches, heart and brain health, and what levels and doses I recommend for my patients.

This post reviews new data showing that fMRI‑guided, connectivity‑based TMS targeting improves response rates in treatment‑resistant depression and likely other conditions. By mapping each patient’s brain circuits, clinicians can move beyond a one‑size‑fits‑all DLPFC target to condition‑specific and patient‑specific sites, a particularly important advance for migraine and network‑based pain disorders.

The science of essential oils and the brain is still young, but the findings so far are more compelling than many people realize. Brain imaging studies show that common scents like rose, lavender, peppermint, and lemon produce measurable changes in brain structure, brain activity, and pain processing. These studies are small and preliminary, and essential oils are not a substitute for medical treatment. But the evidence suggests that what we smell can influence the brain in real, physical ways