Josh TrentIdentity Transformation Architect and award winning Host of the Wellness + Wisdom Podcast—a decade-strong show with over 750 episodes and 15M downloads.

Unlock Fasting Benefits: The 36-Hour Secret Revealed! #shorts

27 Aug 2026 · 2 min

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This content was created by Josh Trent. This content was uploaded by Josh Trent. This is a YouTube short titled "Unlock Fasting Benefits: The 36-Hour Secret Revealed! #shorts" (uploaded August 27, 2026). A single speaker (labeled SPEAKER A) explains fasting physiology: glycogen stores are typically depleted around 24 hours, which triggers a switch from fed/postprandial metabolism to fasting/ketone metabolism; the speaker argues the 36-hour mark is where many fasting benefits begin to emerge (and are seen in animal models), notes that short intermittent fasts like 16:8 are unlikely to induce autophagy, stem cell regeneration, or longevity effects, and cites alternate-day fasting studies in animals showing ~30–80% lifespan increases often independent of calorie intake.

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One of the reasons why the 36-hour time point seems to be so magical is because biologically speaking, it takes around 24 hours for your body to actually deplete its glycogen stores, so your stored carbohydrates. And that's really the key mechanism where you switch over from what we would call like postprandial fed metabolism into truly fasting metabolism and ketone metabolism. Mm-hmm. So once your stored carbohydrates are gone, that's when your body really starts amping up ketone production. That's where a lot of the benefits that we associate with fasting actually begin to happen. Not even that that's when they peak, but that's where they actually start. Hmm. So one of the biggest misconceptions with fasting is that if you're doing like an intermittent fast, like a 16:8 fast, you are getting things like autophagy or, you know, stem cell regeneration or immune resets or even longevity benefits. And that's just not the case because your body hasn't been fasting long enough to actually switch over to this new mode of metabolism. So the 36-hour mark is where we see in a lot of animal models that we get the best lifespan extension. So if you take an animal and you put it on an alternate-day fasting regimen, so eating normally one day, then fasting the next, eating normally one day, fasting the next, rinse and repeat for their entire lifespan, you can see anywhere between like a 30 to 80% lifespan increase just by— Wow. Changing when they're eating. And a lot of times this is also independent of caloric intake. So that's where we see the best lifespan extension in the actual animal data. And then going back to the human side of things, that's where we're gonna see some of the best mechanisms behind fasting really get to their— get their peak level. So after that 24-hour mark and then extending that to the next day.