Top Epidemiologist Reveals 7 Health Habits He Changed Based on Latest Science

This episode features Professor Tim Spector, a leading epidemiologist and co-founder of ZOE, discussing how evolving scientific evidence has changed his personal health practices. The conversation highlights why nutrition science evolves slowly, often taking decades for new evidence to translate into updated guidelines, as seen with the reversal on dietary fat recommendations.

Spector reveals seven key changes to his health routine. Most notably, he now prioritizes optimal oral hygiene including daily flossing after learning that proper dental care can reduce dementia risk by 20-40% through reducing inflammatory microbes that affect brain health. He's also shifted his exercise focus from cardiovascular training to strength training with weights to build lean muscle mass, and began taking creatine supplements based on new evidence.

Personal health testing revealed several concerning findings that prompted targeted interventions. Blood tests showed elevated microplastics levels, leading him to reduce plastic exposure through natural toothpaste and glass containers. Low omega-3 index scores prompted increased consumption of oily fish like anchovies and sardines rather than supplements. Chronic low B12 and folate levels, despite eating some meat, led to targeted supplementation after learning about folate's brain benefits in older adults.

Regarding vitamin D, Spector maintains skepticism about universal supplementation but acknowledges some people may benefit from natural sunlight exposure rather than pills. He emphasizes the importance of personalized testing and evidence-based decision making, noting that while he's changed specific practices, his core beliefs about gut microbiome health and avoiding ultra-processed foods remain stronger than ever. The discussion underscores how even experts must adapt their practices as science evolves.