11/19/2025
Time change incoming this weekend and if you only do one thing to make the transition easier, make it this:
👉 Get outside within 30 minutes of waking up and here’s why…
Morning sunlight resets your circadian rhythm. The wavelengths from the low sun hits photoreceptors in your eyes. These cells send a signal straight to your suprachiasmatic nucleus (SCN) which is your brain’s internal clock.
(basically the wavelengths from the sun enter your brain through the eyes and initiate a cascade of events inside your body)
For one, it spikes cortisol at the right time, and sets your cortisol awakening response (this is the strong rise in cortisol the first two hours you’re awake - see slide 1). In fact, your body releases about 50-75% of your total daily cortisol during this time.
Conversely, a flattened cortisol awakening response (see slide 2) increases risk for cardiovascular disease, metabolic syndrome, and mortality (yep, they’ve actually studied that 😬).
If that’s not convincing enough, sunlight exposure to the retina also increases dopamine and serotonin (which are both linked to motivation, energy, and emotional stability). And c’mon my perimenopause sister - you KNOW you want more of that!
Speaking of perimenopause, your circadian rhythm controls not just sleep but also insulin sensitivity, thyroid hormone conversion, and fat oxidation… all things that take a hit when we start losing estrogen.
Basically, people who get consistent morning light have better blood sugar control and metabolism even when our hormones are working against us.
So if you want better hormones, a happier brain, more energy, and better weight management - get morning light.
Earlier sunrise is a GIFT, not an annoyance.
P.S. Even if it’s cloudy, outdoor light is 10–100x stronger than indoor light. Once the sun’s up (even if it’s a cloudy day), head outside for 5–10 minutes (no sunglasses and no windows between you and the sky).
Your cortisol rhythm is one of the strongest markers tied to your long-term health outcomes. DM me or comment "DUTCH" if you’re interested in testing your hormones.