Podbit · The Diary Of A CEO with Steven Bartlett
The Glucose Ketone Index divides blood glucose (converted to mmol/L) by blood ketone level. A low number means your cells are burning fat efficiently — like Paleolithic man. A high number means you are in the 'red zone' of chronic disease risk. You can measure it yourself with a $30 finger-prick device.
Where this was said
At 37:38 · chapter starts 32:35
The global cancer distribution is a natural experiment in Seyfried's thesis. Countries living closest to a Paleolithic lifestyle — traditional diet, high physical activity, minimal chemical exposure — have the lowest cancer rates. Albert Schweitzer documented the near-absence of cancer in African tribes living traditionally. High-income nations, by contrast, are saturated with processed carbohydrates, chemical exposure, inactivity, and chronic stress. [1] — Thomas Seyfried "Niger, Gambia, and Nepal have almost no cancer. Australia, New Zealand, and the US have the most. The difference is modern lifestyle — proc…" 29:00 The wolf-versus-dog analogy crystallises the argument memorably: wolves in the wild, sharing the same biology as domestic dogs, almost never develop cancer. Domestic dogs — fed processed food, under-exercised, living in apartments — have cancer as their leading cause of death. Same genome. Completely different outcome. Same principle holds for humans. Seyfried also addresses genetic risk factors here: BRCA1 and Li-Fraumeni mutations are real, but they are incompletely penetrant — they do not guarantee cancer — and every one of them, when examined, disturbs mitochondrial oxidative phosphorylation in some way, reinforcing rather than contradicting the metabolic theory.
Self-help fails because people are sold one universal cure by the hyper-responders who had a transformative result from it. The real problem is context: every method works for the right person at the right time, which is almost never you just because the author says so.
Spencer Greenberg was once so socially anxious his heart pounded just approaching a stranger. His therapist gave him homework: go to a bar alone, talk to 5 strangers. Starting with asking for the time, he worked up to asking men for hugs — and his anxiety fell dramatically in 6 months.
A person who flies regularly but obsessively checks weather forecasts before every flight is not doing exposure therapy — they're teaching their brain that flying is only safe with the ritual. Safety behaviors prevent the brain from ever learning that the feared thing is actually fine.
The worry-time technique assigns all worries to one scheduled slot (e.g. 5 PM). Every time a worry surfaces, you write it down and ban yourself from engaging with it until that time. When 5 PM arrives, most worries feel trivial and the act of batch-worrying exposes how little it actually accomplishes.
In a randomized study of 20 habit techniques, 'habit reflection' stood out: recall a past habit you successfully built, write down what helped you succeed, then apply those same strategies to your new habit. It works because it's self-adapting — it uses whatever worked for YOU.
The tiny habits technique — always having a minimal version of your habit you can do when life gets in the way — keeps the mental machinery of habit formation from breaking. Paradoxically, people given a tiny-habit fallback option were MORE successful at the full habit, not less.
Fears and worries act like playground bullies — they want to ambush you. But when you deliberately seek them out and choose the time of engagement, they lose their power. The volitional act of starting the fight on your own terms is one of CBT's most underappreciated insights.
Most downtime defaults are things you regret immediately after — phone scrolling, binge TV. 'Glad you did it' activities meet the same need for rest but leave you feeling like you spent your time well. The switch from a bad screen to a documentary, a book, or a walk costs almost no extra effort but compounds into identity over time.
You rarely control your first reactive thought. But you can train your second thought — the response to the trigger — by asking whether your initial reaction is the most helpful one and replacing it with something equally true but more constructive. Over time, that second thought becomes automatic.
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