Podbit · Huberman Lab
A physiologic starting dose is 100–120 mg/week of testosterone cypionate or enanthate, divided into every-other-day or three-times-weekly injections. Warning signs requiring close monitoring include acne, hair loss, mental status changes, lipid shifts, cardiovascular risks, fertility issues, and elevated hematocrit.
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At 26:48 · chapter starts 24:52
Fadogia agrestis is introduced as a plant genus that stimulates testosterone production by increasing LH release from the pituitary — acting upstream of the Leydig cells rather than mimicking LH directly. Huberman raises the toxicity concern he has heard about, and Gillett addresses it head-on: a rat study showed dose-dependent increases in the pro-inflammatory markers GGT and alkaline phosphatase at higher doses, but at the human-equivalent dose of 300 mg/day, no toxic effect was observed. He notes the important caveat that rodent toxicity doesn't always translate to humans, but recommends 300 mg/day as a conservative safe ceiling. A practical alternative he uses with his own patients is 600 mg taken three times per week (e.g., Monday, Wednesday, Friday), spreading out the exposure.
Fadogia agrestis increases luteinizing hormone release from the pituitary, triggering the Leydig cells to produce more testosterone. Based on rat-to-human dose translation, 300 mg/day is the safe threshold; 600 mg three times per week is a practical alternative.
A rat study showed 300 mg/day equivalent is the dose with no toxicity for Fadogia agrestis; alternately 600 mg every other day or 3 times a week.
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.
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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.
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