Ep. 515: Super Body with Dr. William Davis

·57 min·5 clips

Dr. Davis cites studies of over 60,000 people showing calorie-cutting weight loss leads to earlier death and accelerated frailty.

Host Jejah Flazanes introduces the episode, noting Dr. William Davis's return to discuss his new book 'Superbody,' available as of December 16, 2025. She promotes her own programs, The Metabolic Makeover and Date Your Body, before welcoming Dr. Davis. Dr. Davis explains that 'Superbody' builds on his previous work in 'Supergut,' focusing on body composition and the gut-muscle axis. He argues that traditional weight-loss methods, including diets, bariatric surgery, and GLP-1 agonists, primarily reduce calories but lead to significant muscle loss. Citing databases like NHANES tracking over 60,000 people, he states that calorie-cutting weight loss is associated with earlier death and increased frailty. Dr. Davis discusses the importance of resistance training and preserving muscle to avoid sarcopenia and dementia. He delves into the role of abdominal visceral fat and myosteatosis, where fat infiltrates muscle, impairing function. The conversation shifts to gut health, with Dr. Davis blaming antibiotic overuse for destroying beneficial microbes and allowing fecal microbes to proliferate, causing endotoxemia linked to inflammation and diseases. He highlights the neglect of collagen and hyaluronic acid due to dietary guidelines against saturated fat, explaining these nutrients are vital for skin, joints, and arterial health. Dr. Davis compares marine and bovine collagen sources, noting uncertainty in optimal dosages. He introduces myokines, peptides from muscle that may support brain health, and suggests grip strength as a simple predictor of future health. Dr. Davis outlines the 'Superbody' three-week program, emphasizing it compensates for medical ignorance and requires some effort but offers long-term benefits. Flazanes shares personal anecdotes about health investments and aging, stressing proactive care. Dr. Davis concludes with the story of Danny Cahill from 'The Biggest Loser,' who regained weight despite extreme efforts, underscoring the flaws in calorie-restriction approaches. The episode ends with promotions for the book and future discussions.

As heard by us

A practical, skeptical conversation about body composition, collagen, microbiome health, and uncertainty.

Body composition gives this episode its center as Jejah Flazanes brings Dr. William Davis back for a discussion of Superbody, body fat, lean muscle mass, and the microbiome.

Read the full review in PlayNext →

Why you'd press play

You can press play when body fat, lean muscle, collagen, and the microbiome have become one crowded health question.

Read the full recommendation in PlayNext →

Listen to the show on

Apple Podcasts Spotify

Play clips from this episode More from Spirit, Purpose & Energy