Uploaded June 2026 | Updated September 2026, 1 week ago

---

For extra nuances and all the references, please see the newsletter: staycuriousmetabolism.substack.com/p/how-i-hacked-my-girlfriends-brainwith?r=40ekz2&utm_campaign=post&utm_medium=web&triedRedirect=true

Can light influence attraction, hormones, and even reproductive biology?

In this video, we explore surprising research on light exposure, testosterone, estrogen, fertility signals, and behavioral changes observed in both animal models and human studies.

From hormone cascades triggered through the skin to seasonal changes in reproductive biology, this is a fascinating look at how deeply light may shape human physiology.

Along the way, I also test whether increasing my own sunlight exposure changes my testosterone levels and reveal how my girlfriend hacked my brain!

For more nuance, mechanisms, protocols, and limitations behind these findings, check out the full deep dive linked above.

Chapters
0:00 – Light Can Make You More Attractive
3:00 – The Dance Between Light and Human Evolution
6:37 – Some Crazy Experiments in Mice
9:22 – Human Studies on Attraction & Hormones
11:05 – Nick’s Funny Personal Diamond Necklace Story
12:12 – Fertility & Reproductive Biology
13:51 – The Science of Solar Angle
14:53 – My Sunlight Testosterone Experiment
15:20 – The Bigger Picture of Light & Hormones

#Sunlight #Testosterone #UVB #Hormones #Metabolism #Fertility #HealthScience #Longevity #CircadianRhythm #Biohacking #MensHealth #WomensHealth #LightExposure #HumanBiology #Mitochondria #EvolutionaryBiology #HormoneHealth #Phototherapy #Science #StayCurious