The Ideal Nutrition Podcast · Aidan Muir and Torwen Eerkens

Is It Possible to Boost Your Metabolism?

·20 min·1 clip

The Biggest Loser participants' resting metabolic rate stayed about 500 calories per day below prediction six years later.

1. The Ideal Nutrition Podcast episode 226 is about whether it is possible to boost metabolism. 2. Aidan Muir hosts with Torwen Eakins, and both are dietitians who frame the discussion around metabolism, weight loss, and practical nutrition. 3. The episode asks what people mean when they say 'boost metabolism' and whether short-term or long-term changes actually move resting metabolic rate or total daily energy expenditure. 4. Aidan defines metabolism as the process that converts food and drink to energy, and separates resting metabolic rate from activity factor, non-exercise activity thermogenesis, and the thermic effect of food. 5. The hosts say short-term calorie intake can change energy expenditure in both directions, with more calories probably increasing expenditure and fewer calories probably decreasing it. 6. They describe metabolic adaptation as the body adjusting to what it is given, including lower core temperature, reduced hormone function, less incidental movement, and lower step counts. 7. The thermic effect of food comes up as another piece of the puzzle, because eating and digesting more food burns more calories than eating less. 8. The Biggest Loser Study is the main long-term example, and the hosts note that participants lost a significant amount of weight and later had resting metabolic rate about 500 calories per day lower than predicted. 9. They say Kevin Hall has pointed to the participants' extreme exercise as one possible explanation for the suppression seen in that study. 10. Bariatric surgery studies are presented as a counterpoint, including one case where resting metabolic rate was slightly above what a formula predicted six months after surgery. 11. The hosts say one study titled 'metabolic adaptation is an illusion' found no difference four weeks after the fat-loss phase once weight had stabilized. 12. They emphasize that the body seems to care more about recent calorie balance than about what happened years ago. 13. They also note that the change in metabolic adaptation did not predict weight regain one year later in that study. 14. Reverse dieting is discussed as a slow increase in calories after a deficit, but the hosts question whether adding 100 calories per week is actually necessary. 15. They argue that many reverse-dieting case studies may simply end in a surplus while appearing like maintenance. 16. The episode covers yo-yo dieting, with the hosts saying repeated big swings up and down can increase hunger and make weight maintenance harder. 17. They contrast that with bodybuilding-style bulking and cutting, which they describe as more controlled than typical yo-yo dieting. 18. The tone is practical and conversational, with back-and-forth discussion, short study references, and occasional anecdotes from clinical work at Ideal Nutrition. 19. People interested in dieting, weight regain, maintenance calories, and metabolism myths would likely get the most from this episode. 20. People looking for a quick recipe episode or a non-nutrition topic would probably skip it.

As heard by us

A clear, skeptical look at what metabolism means and what can be claimed about changing it.

The episode opens by laying out metabolism in plain terms: the body turns food and drink into energy, and total daily energy expenditure includes resting metabolic rate, activity, non-exercise movement, and the thermic effect of food.

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Why you'd press play

For when you want metabolism explained without the gym-floor mythology.

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