In this episode of the School of Doza podcast, Nurse Doza explores Your Brain on Screens: What 4 Hours at the Computer Really Does. Discover how prolonged screen time affects your brain tissue, sleep cycles, mood stability, and social interactions—while also putting your body into constant fight or flight. If you’re working long hours on a computer, this is the wake-up call your brain needs.

5 KEY TAKEAWAYS

• Brain Tissue Damage: Just four hours of daily screen time can thin critical brain areas tied to memory, behavior, and IQ.
  
  
  
  


• Sleep Disruption: Exposure to blue light delays melatonin release, disrupting circadian rhythms and long-term cognitive health.
  
  
  
  


• Mood Disorders Rise: Excessive screen time is directly linked to higher rates of depression, anxiety, and even suicidal thoughts.
  
  
  
  


• Constant Fight or Flight: Early screen exposure spikes cortisol, setting the nervous system into chronic stress mode.
  
  
  
  


• Social Isolation Effects: Heavy screen use replaces real human connection, impairing emotional health and increasing loneliness.
  
  
  
  

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TIMESTAMPS

00:00 START – Introduction: Why this episode matters more than ever

01:00 How much screen time are we really exposed to?

04:00 First Effect: How 4 hours of screen time damages brain tissue

08:00 Does too much screen time lower your IQ?

09:00 Second Effect: How screen time destroys your sleep quality

12:00 The dangerous link between blue light, melatonin, and cognitive decline

13:00 Third Effect: Increased mood disorders and the dopamine trap

16:00 How doom scrolling affects ADHD, depression, and anxiety

17:00 Fourth Effect: Why screen time keeps you stuck in fight or flight

22:00 Microsoft study reveals the hidden toll of back-to-back meetings

24:00 Fifth Effect: How screens are causing massive social isolation

27:00 Solutions: How to manage screen time and protect your brain health

28:00 Featured Product: How Mitochondriac helps support your mental clarity

RESOURCES

1. What Excessive Screen Time Does to the Adult Brain – Stanford Longevity Center
   
   
   
   


2. Screen Time and Cognitive Decline – PMC Study
   
   
   
   


3. The Role of the Pineal Gland in Brain Health – PMC Study
   
   
   
   


4. The Reverse Flynn Effect – Journal of Integrative Neuroscience
   
   
   
   


5. Blue Light and Eye Health – WebMD
   
   
   
   

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