Sleep Apnea Expert: 1 Billion People Have This And Most Go UNDIAGNOSED! | Dr Andy Galpin

Steven Bartlett interviews exercise physiologist Dr Andy Galpin on sleep, energy management, and health markers, with a heavy focus on underdiagnosed sleep disorders. Galpin claims clinical sleep apnoea is frequently missed—particularly in women—and argues that apnoea can harm health even when it does not obviously wake a person. He discusses drivers of worse sleep in modern life, including increased light exposure, urban noise, and inconsistent environmental cues, and he recommends a stepwise approach to diagnosis: validated questionnaires, cautious use of wearables, and formal sleep studies when disease is suspected.

The pair discuss common sleep aids and habits. Galpin describes melatonin as primarily a circadian-shifting hormone and warns against routine nightly use; he also claims supplement labels can be inaccurate, citing studies and his group’s urine testing. Bartlett raises Meta’s reported use of AI in content recommendation, suggesting social platforms may become even more effective at retaining users through personalised feeds and AI-generated content.

In a blood-work segment, Galpin tells Bartlett his cholesterol-related markers were concerning, with Bartlett linking the timing to a ketogenic diet and a family history of cardiac events; Galpin emphasises medical oversight and imaging over self-experimentation alone. The episode also covers energy and training: Galpin argues top performers are distinguished by energy allocation, not simply working harder, and he outlines how exercise, diet, stress, and “hidden stressors” (including a mould exposure case involving an unnamed MLB player) can affect fatigue. Later sections address training programming, rest intervals, AI-generated workout plans, and misconceptions around weight loss and exercise.

• Galpin claims 70–80% of clinical sleep apnoea cases are undiagnosed, rising to 90–95% in women.
• He argues melatonin is best reserved for circadian reset (e.g., jet lag) and warns some products may be mislabelled by large multiples.
• Bartlett says Meta described using large language models to interpret content for recommendations, potentially increasing retention and personalisation.
• Galpin tells Bartlett his cholesterol markers were concerning and advises medical follow-up, especially given family history and diet context.
• Galpin describes environmental factors—light, noise, and inconsistency—as major modern sleep disruptors.
• On energy, Galpin distinguishes visible stressors (e.g., lack of exercise) from hidden ones, citing a mould exposure case in an unnamed MLB player.