Dr. Deutsch explains that the vast majority of hair loss is androgenetic alopecia — driven by androgens (hormones) and hereditary genetics. The 'safe donor zone' at the back of the head is immune to this process, which is why it persists even in completely bald men and makes it the gold standard source for transplant hair.
Where this was said
At 1:12:51 · chapter starts 1:10:00
Dr. David Deutsch from Bosley joins to discuss the hair transplant he performed on producer Carlos. The numbers are staggering: Carlos lost approximately 60,000–70,000 of the average head's 90,000–150,000 hairs, and Dr. Deutsch replaced about 7,000–8,000 via FUE — follicular unit excision — taking individual follicles from the safe donor zone at the back of the head. He explains androgenetic alopecia (the hormones-plus-genetics root cause of most baldness) and the concept of donor dominance, which means transplanted follicles maintain their growth properties wherever they land — meaning you could theoretically grow hair on your calves, your palms, or anywhere else. [1] — Dr. David Deutsch "Dr. David Deutsch from Bosley breaks down producer Carlos's hair transplant: roughly 70,000 hairs lost, about 7–8,000 transplanted from the…" 1:09:50 Bobby immediately asks about a beard transplant for when he turns 60, and whether pubic hair can be used as donor hair (technically yes, but curly). Andrew reveals he grew a beard at 15 and has maintained it since because it covers 'how fucking weird his face looks.' The episode closes with both hosts expressing mock existential dread about Bobby turning 60 in five years.
Dr. David Deutsch of Bosley estimated that producer Carlos had lost approximately 60,000–70,000 hairs, out of a typical human head's 90,000–150,000 total.
Dr. Deutsch transplanted approximately 7,000–8,000 hairs into Carlos's head, a fraction of what was lost but sufficient for cosmetic density.
Dr. Deutsch explained that the 'safe donor zone' at the back of the head maintains hair even in fully bald individuals due to donor dominance, making it ideal for transplants anywhere on the body.
Spike your cortisol in the first 1–3 hours of your day — with sunlight, hydration, exercise, or caffeine — and you set up elevated mood, focus, and stress resilience for the rest of the day. Miss that spike and you get a flat cortisol curve: brain fog, poor learning, and bad sleep. The bookend is equally important: dim lights, no caffeine, and wind down the final hour.
Bottom-up impulses — just eat the cookie, keep scrolling — are driven by deep brain structures. Top-down prefrontal control is the thing that lets you wait, learn, and grow. Every small act of choosing the harder thing, from picking up trash to doing the workout you dread, greases that top-down circuit — and it transfers to everything else.
A Washington University in St. Louis study found that the attention-improvement effects of Ritalin are effectively equal to a great night's sleep. Stimulants also stunt growth and reduce sleep quality. The new direction is combining lower medication doses with genuinely better sleep — not replacing sleep with pharmacology.
Two big inhales through the nose, then a full exhale to empty — that's the physiological sigh. It fires a specific vagal pathway to slow your heart rate, offload CO2, and tip the autonomic nervous system toward calm instantly. Doing just 10 deliberate exhales throughout the day measurably elevates HRV by nighttime.
Presence isn't a state you fall into — it's something you actively produce by anchoring perception to the immediate environment. Ask 2–3 trivially specific questions about your surroundings (how many cans, what does it smell like) to pull your brain out of past/future mode. Then deliberately choose what to think or say next. That's it.
Acknowledge the thing, feel all of it, uncouple the emotion from the memory, then transmute the experience into something meaningful. Most people stall at step 2 — feeling the feelings — and never reach uncoupling. An entire generation is stuck there, confusing emotional processing for healing. Moving through all four is the actual path out.
Nicotine creates a uniquely alert-and-calm state ideal for learning — but only at low doses used occasionally. If you're using 3–6 mg pouches multiple times a day, you're not getting a cognitive enhancement, you're just rescuing yourself from withdrawal. For a genuine performance effect, use it once or twice per week at most.
Two injections of BPC-157 (100–200 mcg) eliminated shoulder pain Huberman couldn't shift for months. The peptide pinealon gave him 2.5–3 hours of REM sleep inside 6 hours — an effect that persisted into subsequent nights and scaled down to just once per week. Neither is in the book because the human data aren't there yet, but the animal evidence is strong.
Long, slow cardio builds capillary networks and mitochondrial richness; high-intensity intervals push VO2 max. You don't need huge volumes of either. Huberman's protocol: one 45–60 minute long slow session, one near-maximal effort HIIT session (Airdyne 20-on/10-off for 6–8 rounds), and one medium 30-minute effort per week. That's the complete cardio picture.
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