How Sunlight Supports Weight Loss, Appetite Regulation, & Disease Prevention - With Dr. Alexis Cowan

The Model Health Show

Shawn Stevenson

Fitness, Nutrition, Health & Fitness

4.8 • 7.3K Ratings

🗓️ 15 June 2026

⏱️ 77 minutes

🔗️ Recording | Apple Podcasts | RSS

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Summary

Most people know that sunlight exposure can help regulate your sleep or help boost your vitamin D levels, but did you know that a healthy dose of outdoor sun exposure can also influence your metabolism? Today you’re going to learn about the powerful impact that light has on human health and longevity. On this episode of The Model Health Show, Dr. Alexis Cowan is back for a conversation on the role that different light spectrums play in regulating human health and behavior. Dr. Cowan is a Princeton-trained PhD from Princeton from one of the top metabolism labs in the world. Her work is centered around the intersection of light, mitochondrial health, and biophysics. In this interview, we’re diving into the interesting science of how light sends signals to our biology. You’ll learn how different light spectrums can affect your weight and appetite, influence your susceptibility to chronic illnesses, impact your eyesight, and more. This conversation is a fascinating look at the fundamental relationship between humans and the sun. I hope you enjoy this episode of The Model Health Show! In this episode you’ll discover: How our modern environment compares to ancestral conditions. (6:22) What different light inputs can signal to our biology. (8:53) The role of UV light for human health. (10:24) How UV light exposure impacts appetite regulation. (17:43) The dynamic relationship between clock genes and light inputs. (21:35) What the link between blue light and leptin is. (23:28) How sunlight exposure can affect your eye health. (32:22) A conversation on the link between sun exposure and skin cancer. (40:26) How to mitigate your risk of sunburn. (43:42) The role of melanin in the skin. (46:54) Best practices for healthy sun exposure. (52:46) How light exposure at night can influence your sleep quality. (1:04:31) Items mentioned in this episode include: DrinkLMNT.com/model - Get a truly meaningful dose of electrolytes in a science-backed ratio. Free sample pack with any order. Piquelife.com/model - Doctor-approved, cutting-edge solutions for your head-to-toe health and beauty transformation. Get exclusive savings on bundles & subscriptions. The Incubator - Subscribe to Dr. Cowan’s book club! Connect with Dr. Alexis Cowan Website / Podcast / Instagram / X Be sure you are subscribed to this podcast to automatically receive your episodes: Apple Podcasts Spotify Soundcloud Pandora YouTube This episode of The Model Health Show is brought to you by LMNT and Pique. Most people are underhydrated—and it’s costing you energy, focus, and performance. LMNT delivers a science-backed electrolyte ratio with no sugar, no junk—just what your body actually needs. Get a free sample pack with any order at drinklmnt.com/model. Elevate your daily ritual with cutting-edge, doctor-approved teas designed to support your metabolism, skin, and overall vitality. Unlock exclusive savings on bundles and subscriptions at piquelife.com/model.

Transcript

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0:00.0	You are now listening to The Model Health Show with Sean Stevenson.
0:04.8	For more, visit the modelhealthshow.com.
0:10.2	Welcome to the model health show.
0:12.1	I've got some profound questions for you.
0:15.0	Can sunlight exposure impact your metabolism in ways similar to GLP1 drugs. And on the other side, can a lack of
0:25.4	sun exposure be driving biological scarcity programs within ourselves that are making us gain
0:31.9	weight, struggle with our mental health, and manifest chronic diseases. Today we're going to be discussing this
0:41.0	mind-blowing new research with Princeton-trained scientist Dr. Alexis Cowan. Now before we get to our
0:51.2	special guest, as of this recording, we're moving into the summer
0:54.5	months here in the United States. So more access to sun exposure, but more outdoor activities.
1:02.5	A lot of people like to get outside and play more, but I want you to keep something in mind.
1:08.9	Obviously, when it's hotter, we're going to be sweating more. We're going to
1:13.3	be activating our body's intelligent air conditioning system. And when you sweat, your body loses
1:22.6	very significant electrolytes that help us to move, to contract our muscles, to relax, to perform,
1:30.3	and also to manage our nervous system and our cognitive function as well.
1:36.3	And a study published in the Journal of Sports Science found that vigorous exercise in hot weather
1:41.3	can result in up to seven grams of sodium loss.
1:47.0	Now, this is profound because researchers at McGill University have detailed how sodium deficiency
1:54.0	can deeply cause dysfunction with our cognitive health.
1:58.0	And just even keeping in that lane, sodium is required for our brains to maintain
2:04.4	proper fluid ballots. So this is deeper than just sweating out our sodium. You know how I feel
2:09.7	is kind of like salty. You know, it kind of tastes salty. Somebody sweat. Maybe you give a little
	...

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