Science Roundup: Supplements, Diet-Glasses, HDL

Iron Radio: Do Supplements Beat Food for Vitamin Status? Wearable Food-Tracking Glasses + HDL, Exercise & Depression On Iron Radio, hosts Dr. Lonnie Lowery, Dr. Mike T. Nelson, and Coach Phil Stevens discuss Nelson’s Flex Diet Certification and how supplementation topics are integrated due to time constraints, plus his creatine research PDF. They review a new NHANES-based paper (Sternberg et al., May 2026) suggesting supplement use explains more variability in vitamin biomarkers (R² ~3–21%) than reported dietary intake (~0.8–8.8%), while noting limitations like recall bias, low explained variance, and imperfect biomarkers. They then examine a 2021 AIM2 wearable device that detects eating episodes and captures food images with ~83% accuracy, debating research benefits versus privacy and data-broker concerns. Finally, they critique a 2026 cross-sectional study linking physical activity, HDL cholesterol, and lower depression odds, arguing the effect is associative and likely non-causal, and expand into broader concerns about interpreting lipids in athletic populations and medical risk models. 00:00 Show Intro and Hosts 01:05 Flex Diet Cert and Supplements 03:23 Brevity in Science Talks 05:34 Talk Tactics and Backup Slides 08:22 Supplements vs Food Biomarkers 14:04 Vitamin D and Biomarker Limits 15:21 Iron Radio Feed Update 16:32 Newsletter and Book Plug 18:21 Wearable Food Tracking Glasses 21:00 Privacy and Data Broker Fears 23:21 VR Ads and Escape 23:53 Food Illusions and Conditioning 24:27 Research Uses vs Privacy 26:20 Testing Dietary Recall Accuracy 27:39 HDL Exercise and Depression Study 30:29 Is HDL Really Causal 33:21 Selling Results in Titles 35:02 HDL Drugs and High HDL Debate 37:08 Statins Risk Models and Exercise 40:15 Athlete Labs and Wrap Up Donate to the show via PayPal HERE.You can also join Dr Mike's Insider Newsletter for more info on how to add muscle, improve your performance and body comp - all without destroying your health, go to www.ironradiodrmike.com Thank you!Phil, Jerrell, Mike T, and Lonnie