Podbit · The Diary Of A CEO with Steven Bartlett
Extended fasting windows don't just restrict calories — they send a famine signal to a woman's ovaries, which contain roughly 100,000 mitochondria per egg and are constantly scanning the environment for safety. The result: suppressed ovulation, disrupted cycles, and cascading hormonal damage.
Where this was said
At 27:09 · chapter starts 26:11
Dr. Estima's third myth targets long fasting windows — 20, 24, 36, 72 hours and beyond. The female body is uniquely sensitive to energy availability because it has to decide each cycle whether conditions are safe for pregnancy. With 100,000 mitochondria per egg cell, ovaries are extraordinary energy scanners. Prolonged fasting signals famine, shutting down ovulation. Rather than extended fasts, Dr. Estima recommends a natural overnight fast: stop eating 2–3 hours before bed, sleep 8–9 hours, eat breakfast — totalling 10–11 hours of fasting. Pushing the eating window further compresses the space available to consume sufficient protein, calories, and macros. [1] — Dr. Stephanie Estima "Extended fasting windows don't just restrict calories — they send a famine signal to a woman's ovaries, which contain roughly 100,000 mitoc…" 27:09
Women have 10 to 20 times less testosterone than men, which is why even identical training programmes produce far less muscle mass in women.
Fasting windows of 20, 24, 36, or 72+ hours can signal famine conditions to the female body, suppressing ovulation and disrupting hormonal cycles.
Each human egg cell contains approximately 100,000 mitochondria, making female ovaries acutely sensitive to energy availability and fasting signals.
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.
We use essential and analytics cookies to run Vuci. To understand how the site is used: Privacy Policy.
Install Vuci on your phone
Add it to your home screen for a faster, app-like experience.
Install Vuci on your phone
Tap the Share button, then “Add to Home Screen”.
A new version is available
Reload to get the latest Vuci.