The NAD Expert: This Is the Ideal Level for Your Cells | Dr Jin Xiong She

Discover the truth about population-wide NAD+ optimization with Dr. Jin-Xiong She from Jinfinity Precision Medicine. We break down the clinical flaws behind the recent Janssen and Houtkooper human blood study claiming NAD levels do not decline with age or lifestyle habits. Learn how ethnicity, health status, NMN vs. NR synergies, and high-dose niacin vascular inflammation impact intracellular biomarkers, and discover the true optimal blood reference target for healthy aging Some links are affiliate links so we will earn a commission when they are used to purchase products. 🧬 SUPPORT THE CHANNEL & LONGEVITY PARTNERS If you would like to support our channel please consider joining our Patreon   / modernhealthspan   ~~~~~~~~~~~~~~ Jinfiniti Vitality Lozenges https://tinyurl.com/n5rm89xw, https://tinyurl.com/k9uy7bzr ~~~~~~~~~~~~~~ Does human NAD+ actually decline with age, and do popular precursors like NMN or NR work for everyone? In this episode of Modern Healthspan, we sit down with clinical frameworks pioneer Dr. Jin-Xiong She, founder of Jinfinity Precision Medicine, to dissect recent human trial publications. Dr. She critiques a controversial recent paper asserting that blood NAD+ remains static across age groups, exposing its narrow testing intervals and misleading over-generalizations. Drawing from thousands of independent patient datasets, Dr. She details the sharp, non-linear NAD drop off that occurs between ages 20 and 30, while revealing the hidden impacts that ethnicity and background health status have on your baseline cellular metrics. We also explore the optimal human blood target range, shifting from a baseline of 40 µmol to a clinical sweet spot between 55 and 80 µmol, and highlight the surprising cardiovascular inflammation risks linked to over-supplementing with high-dose niacin 📚 Chapters 0:00 Intro & Nicotinamide Preview 1:31 Meet Dr. Jin-Xiong She 2:09 Critiquing the "NAD Doesn't Decline with Age" Paper 5:53 How NAD Actually Changes with Age 8:43 Health Status, Ethnicity & Population Variability 11:04 The Study's Narrow Age Range Problem 15:17 Exercise, Protein & Lifestyle Effects on NAD 20:05 Blood NAD vs. Tissue NAD Levels 25:52 Freezing, Storage & Blood Spot Testing 29:52 NMN vs. NR vs. Nicotinamide: Which Works Best 37:23 Microbiome, Niacin & Vascular Risk 43:35 Does IV NAD Therapy Actually Work? 50:29 Optimal NAD Levels & How Often to Test 🌐Links in this video ⚠️ CLINICAL RESEARCH & MEDICAL COMPLIANCE DISCLAIMER This video features a scientific interview with a diagnostic investigator discussing intracellular biomarkers, baseline clinical data populations, and metabolic precursor biochemistry. The evaluations of intracellular blood ranges, testing calibration protocols, and therapeutic outcomes represent scientific interpretations of literature and private laboratory metrics; they are not intended as personal medical directives or absolute diagnostic consensus. This content is provided strictly for educational, research validation, and general longevity reporting purposes. It does not constitute formal medical advice, medical diagnostics, or prescriptive therapeutic recommendations. Any changes to your supplementation protocol or intracellular testing adjustments should be developed in partnership with a qualified clinical physician or healthcare specialist #NADPlus #NMNSupplement #HealthyAging