Leyla Weighs In: Oolong Tea, Supplement Absorption, and How Gut Signals Shape Memory

Leyla Weighs In: Oolong Tea, Supplement Absorption, and How Gut Signals Shape Memory

Author: Dr. Ronald Hoffman | Pioneering Complementary Medicine Practitioner September 11, 2026 Duration: 21:48

Nutritionist Leyla Muedin answers a listener question about taking many supplements with oolong tea, explaining that tea tannins can interfere with vitamin and mineral absorption; because oolong is partially oxidized, its tannin level falls between green and black tea, so she recommends taking supplements with water and separating them from tea or coffee by at least an hour (ideally 1.5–2 hours). She then reviews research in Nature Communications from USC on how gut signals via the vagus nerve may influence which food experiences become memories: in rats, nutrient-rich foods increased acetylcholine signaling to the hippocampus, supporting memory for food location, while sweetness without calories did not. Over time, high-fat/high-sugar diets weakened this gut–hippocampus communication and memory performance, with implications for obesity, diabetes/prediabetes, and cognitive decline, and possible future vagus-nerve-based approaches.


Dr. Ronald Hoffman has spent decades at the forefront of integrative care, and his Intelligent Medicine podcast is a direct extension of his clinical practice. Here, the conversation moves beyond the simplistic divide between mainstream and alternative treatments, instead focusing on a nuanced, evidence-informed synthesis. Each episode is a deep exploration of how modern high-tech diagnostics and treatments can be thoughtfully combined with time-tested holistic modalities to optimize health, delay aging, and address complex chronic conditions. You'll hear detailed discussions on the latest research in nutrigenomics, the practical use of supplements, the role of targeted exercise, and the science behind various therapeutic diets. Dr. Hoffman brings clarity to confusing health topics, interviewing leading experts and translating their findings into actionable strategies. This isn't about quick fixes or fads; it's a resource for anyone seeking a sophisticated, personalized approach to well-being, where the best of all medical worlds converges. Tune in for a consistently intelligent and forward-looking dialogue on what truly makes for resilient, long-term health.
Author: Language: en-us Episodes: 50

Intelligent Medicine with Dr. Ronald Hoffman | The Best of High Tech Medicine and Alternative Modalities
Podcast Episodes
Q&A with Leyla, Part 2: The Coronary Artery Inflammation Controversy [not-audio_url] [/not-audio_url]

Duration: 32:45
As soon as I take my blood pressure meds, I get tired and lack energy for the rest of the day. What gives?I'm 77 and have Sjögren's syndrome. Can I take carnitine? How much should I take?Are there cardiac side effects to…
A Comprehensive Look at Immunity and Supplementation, Part 1 [not-audio_url] [/not-audio_url]

Duration: 30:05
Innate–Adaptive Balance and BWH 85 Beta-Glucan with Functional Medicine Physician Dr. Rob Rountree: He brings a nuanced view of immunity that rejects the simple “immune boosting” dimmer-switch model and emphasizes immune…
A Comprehensive Look at Immunity and Supplementation, Part 2 [not-audio_url] [/not-audio_url]

Duration: 32:18
Dr. Hoffman continues his conversation with functional medicine practitioner Robert Rountree, MD, medical director of Boulder Wellcare, in Boulder, Colorado, and long-time educator at the Institute for Functional Medicin…
Q&A with Leyla, Part 2: Advice for Lipedema [not-audio_url] [/not-audio_url]

Duration: 33:53
How can I find an integrative pediatrician in the NYC or Weehawken/Hoboken area?Can the xylitol in my nasal spray have an adverse impact on heart health?I chronically use Vaseline on my lips. Is this a concern?My 25-year…