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
Leyla Weighs In: Morning Coffee and Supplements--What Not to Mix [not-audio_url] [/not-audio_url]

Duration: 22:25
Supplements and Morning Coffee: Timing Iron, Zinc, Calcium, B Vitamins, and Vitamin D: Nutritionist Leyla Muedin explains that coffee (and tea) can interfere with nutrient absorption and digestion, so certain supplements…
ENCORE: Q&A with Leyla, Part 1: At Home Prostate Tests [not-audio_url] [/not-audio_url]

Duration: 33:51
An example of another bad 'scientific' studyWhat do you think of the new at-home prostate test?My calcium score has increased over the years. Am I taking enough Vitamin K? Too much?
ENCORE: Q&A with Leyla, Part 2: Heating Pad for Pain [not-audio_url] [/not-audio_url]

Duration: 34:05
A case study in high cholesterolHow can I lower my Apolipoprotein B? My husband's A1c went up after taking a statin for 5 months. Help!Can you recommend a good foot cream?Using a heating pad for pain — a listener's succe…
Caffeinated Insights: New Findings in Heart Health, Part 1 [not-audio_url] [/not-audio_url]

Duration: 28:39
Cardiologist and electrophysiologist Dr. Gregory Marcus, chair of the American Heart Association scientific statement writing group, reveals evidence on coffee/caffeine and cardiovascular health. He discusses how earlier…