Are Shoe Soles a Significant Health Risk?

Broadcast from KSQD, Santa Cruz on 10-02-2025:

• Dr. Dawn opens by explaining how blood pressure treatment guidelines have been corrected back to 140/90 after the problematic 2015 SPRINT study temporarily changed recommendations to 120/80. That study used ideal measurement conditions - five minutes of quiet sitting, perfect cuff sizes, compliant patients - creating unrealistic targets that caused elderly patients to faint and break hips. The Veterans Administration and major cardiology organizations now recommend treating to 140/90, with statins only for LDL above 190 or 12% ten-year cardiovascular risk.
• An emailer asks about claims linking Tylenol to autism. Dr. Dawn thoroughly debunks this, explaining that Swedish studies of 2.5 million children found no association when controlling for sibling comparisons. She notes autism rates remained flat from 1960-1990 despite widespread Tylenol use, then spiked after DSM-4 in 1994 and DSM-5 in 2013 broadened diagnostic criteria. Recall bias skews studies since mothers of autistic children are asked leading questions about past Tylenol use during pregnancy when fever treatment was medically necessary.
• She discusses RFK Jr.'s mixed positions, comparing him to Isaac Newton who excelled at physics but believed in astrology. While criticizing vaccine misinformation, Dr. Dawn strongly supports RFK's stance on ultra-processed foods. She describes NIH researcher Kevin Hall's studies showing people consume 500 extra calories daily on ultra-processed diets versus whole foods, even when nutrients are matched. The US produces 15,000 calories per person daily, with the food industry engineered to promote overconsumption through hyper-palatable fat-sugar-salt combinations.
• A caller asks about Healthcare 4.0 plans for biometric tracking bracelets and digital twins. Dr. Dawn discusses privacy concerns around constant health monitoring and data collection, noting that while early disease detection could be valuable, mandatory participation raises serious civil liberties issues. She acknowledges voluntary research projects like the Million Man Study but emphasizes the importance of consent and protection against unauthorized data access by advertisers or government agencies.
• An emailer shares research on ultrasound brain stimulation helmets as alternatives to surgical electrode implants. Dr. Dawn explains how 256-element phased ultrasonic arrays can target brain regions like the visual cortex with high precision mechanical perturbation, potentially treating Parkinson's, Alzheimer's, and depression without surgery. The technology remains experimental, requiring MRI guidance, but could become portable and dramatically improve quality of life for neurological conditions currently requiring invasive deep brain stimulation.
• A caller with adrenal cancer asks about fasting-mimicking diets. Dr. Dawn explains that 14-hour fasting before chemotherapy improves outcomes because healthy cells can downshift metabolism while cancer cells cannot. Cancer cells rely only on glycolysis without mitochondrial function, making them vulnerable during fasting states. She recommends chronotherapy - scheduling treatments during fasting periods - and expresses optimism about new cancer therapies like CAR-T cells and CRISPR technologies.
• An emailer asks about inulin fiber for fatty liver disease. Dr. Dawn explains how this fiber found in chicory, Jerusalem artichokes, and root vegetables stimulates gut bacteria to break down fructose before it reaches the liver, preventing fructose-induced hepatic lipogenesis. Inulin supplementation protects against fatty liver disease, increases antioxidant production, and helps with obesity by reshaping the gut microbiome to better process dietary sugars.