Podbit · On Purpose with Jay Shetty
About 10,000 chemicals are in the US food supply, and manufacturers can add new ones simply by declaring them 'Generally Recognized as Safe' — no independent testing required. A single additive called Tara flour hospitalised over 400 Americans with liver failure before anyone asked what it was.
Where this was said
At 11:50 · chapter starts 9:55
In the episode's intellectual core, Dr. Palmer confronts a deeply embedded assumption in his own field: that diet has no meaningful role in serious mental illness. He argues that decades of neuroscience and cell biology research have been quietly converging on metabolic dysfunction as a shared mechanism across mental health conditions — from ADHD to bipolar disorder to schizophrenia — and that this link mirrors the metabolic fingerprint of obesity, diabetes, and cardiovascular disease. People with metabolic disorders are disproportionately likely to have mental health conditions, and vice versa. Palmer's key provocation is deceptively simple: the food we eat becomes the neurotransmitters in our brains and influences every cell's function. [1] — Dr. Chris Palmer "Decades of converging neuroscience evidence point to metabolic dysfunction — not just genes or trauma — as a root driver of conditions from…" 04:40 Ignoring nutrition in psychiatry, he says, leaves clinicians perpetually chasing symptoms rather than treating causes.
A new food additive called Tara flour, added to a beef substitute product, hospitalised over 400 people across the US — many with liver failure — before the FDA began investigating.
In the US, manufacturers can declare new food additives 'Generally Recognized as Safe' (GRAS) without any mandatory rigorous independent testing — an honor system with life-threatening consequences.
About 10,000 chemicals are in the US food supply, many of which have not been rigorously tested for safety, let alone for their impact on human metabolism or brain function.
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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