4.8 • 2.5K Ratings
🗓️ 4 December 2025
⏱️ 9 minutes
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| 0:00.0 | Can a lack of sunlight really change your mood that much? The answer is yes, and the data proves it. |
| 0:05.8 | Every year as sunlight disappears and days get shorter, millions of people experience something |
| 0:10.8 | called seasonal effective disorder or sad, a form of depression triggered by light itself. |
| 0:16.4 | Emerging research has been showing just how deeply those darker months affect your brain chemistry, |
| 0:21.6 | your hormones, and your overall energy. That's why people with sad often feel sluggish, |
| 0:26.6 | that over sleep, they crave carbs. Add in the drop in vitamin D3, which your skin makes from |
| 0:32.6 | sunlight and serotonin activity drops even further. So when we talk about winter blues, we're not just talking |
| 0:38.5 | about motivation, but more about measurable chemical changes inside the brain. Seasonal effective |
| 0:44.5 | disorder isn't weakness. It's your body's response to changes in light, but that means you have |
| 0:49.7 | the power to retrain your rhythm. Depression, including sad, doesn't come from one cause. It's biological, |
| 0:56.2 | physiological, and it's social. So recovery and prevention can come from multiple directions. |
| 1:01.2 | Let's look at what that means in practice. That's your brain chemistry reacting to the and just when you think you've lost your spark, spring comes, and everything changes. |
| 1:28.3 | That's not coincidence. |
| 1:29.4 | That's your brain chemistry reacting to the seasons. |
| 1:32.5 | Every year as sunlight disappears and days get shorter, millions of people experience something |
| 1:37.3 | called seasonal affective disorder or sad, a form of depression triggered by light itself. |
| 1:43.5 | Emerging research has been showing just how deeply those darker months affect your brain chemistry, |
| 1:48.0 | your hormones, and your overall energy. |
| 1:51.0 | I'm Gary Breka, and welcome back to the Ultimate Human Podcast, where we dig into the real science |
| 1:55.0 | of human performance, longevity, and disease prevention. |
| 1:59.0 | Today, we're unpacking one of the most misunderstood mood disorders, |
| 2:03.2 | seasonal effective disorder, and how to beat the winter blues using biology and holistic health. |
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