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Strong convictions, loosely held: how Peter's views have changed (AMA 90 sneak peek): summary
Strong convictions, loosely held: how Peter's views have changed (AMA 90 sneak peek)
- 'Strong convictions, loosely held' came from a hedge fund friend: commit to a view, but drop it when the data changes.
- His views change from three places: new research, expert guests on the podcast, and what he sees in patients.
- He was on keto for 3 years, says it was the best he ever felt, and still calls it effective.
- He now says energy balance drives the metabolic problems, and you can gain weight on keto if you eat too much.
- He's much less fussy about diet style now, as long as protein stays high enough.
How have Peter Attia's views changed?
He still thinks the ketogenic diet can work, but he no longer thinks it works mainly by lowering insulin. He now thinks it works like many restrictive diets, by making it easier to eat less. He used to fast 7 to 10 days each quarter, and says the evidence and the cost changed his mind. The full reasons are in the members-only episode.
Actionable
- Write down one belief you hold strongly about health or work, and what evidence would change it.
- If you pick a diet, judge it by whether it helps you eat the right amount and get enough protein.
- Watch the full AMA if you're a member and want his reasons for stopping long fasts.
Lessons
- Changing your mind is a sign that you're learning. He says it would worry him if his book read the same 10 years later.
- Feeling great on a plan and understanding why it works are two separate questions.
- Look for the boring constant under every trend. For him it's energy balance and protein.
Quick answer
Peter Attia posted this video on Oct 12, 2026. Here's our summary in our own words: a verdict, the answer to the title, 5 takeaways, and Actionable and Lessons sections.
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Watch on YouTube: Strong convictions, loosely held: how Peter's views have changed (AMA 90 sneak peek)
Channel: The Drive with Peter Attia. Published Oct 12, 2026. About 18 minutes.
A note on this summary
This page reports what the video says, in our own words. It is a summary of one creator's views and experience. Check with your doctor before changing supplements, diet, sleep or training.
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FAQ: questions people ask
Does Peter Attia still recommend keto?
He says he still sees it as an effective diet but now believes it works mostly by making it easier to control how much you eat.
Why did Peter Attia stop extended fasting?
In this preview he says the evidence and the cost changed his view. The detailed answer is in the full members-only AMA.
What does 'strong convictions, loosely held' mean?
Commit to a view based on the data you have, and be ready to change it when new data shows up.
Related guides
- YouTube Video Summaries by Topic and Format
- Peter Attia Video Summaries: Verdicts and Takeaways
- Every 125x guide
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