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Old 05-27-2020, 04:34 AM   #1
liftsiron
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How Sunlight Shrinks Your Fat Cells

How Sunlight Shrinks Your Fat Cells
Working up a sweat and watching your diet aren't the only paths that lead to fat loss. Check this out.
by Mike T Nelson, PhD | 05/23/20

Imagine you just stepped out of your time machine after being transported back to Muscle Beach in its prime. You arrive to spot the likes of Vic Tanny, Joe Gold (of Gold's Gym fame), Jack LaLanne, Steve "Hercules" Reeves, Jack Delinger, and later, Dave Draper or even Arnold with his friends.

They were all hanging out and lifting outside instead of being inside a commercial gym. Did they know something special about sunlight?
Arnold
The New Science

Fast-forward to modern bleeding-edge research from Dr. Peter Light who's been investigating the effects of light on fat cells, or what researches call adipocytes (1).

When the researchers subjected fat cells in a dish to blue light, it caused an increased glycerol release and reduced lipid droplet size. Yep, that means the fat cells got smaller.

This is from an increased rate of fat being broken down (lipolysis) or reduction in the free fatty acids and glycerol backbone being reassembled, known as fatty acid re-esterification. In addition, smaller fat cells are healthier since large fat cells are associated with increased insulin resistance and inflammation (2, 3).

"When the sun's blue light wavelengths – the light we can see with our eyes – penetrates our skin and reaches the fat cells just beneath, lipid droplets reduce in size and are released out of the cell. In other words, our cells don't store as much fat," wrote Dr. Light (4).
The Caveat

It's not a double-blind randomized controlled trial in lifting bros, but it is super fascinating. Maybe the old-school Muscle Beach lifters were onto something.
Related:  Using Light to Fix Injury
Related:  The Easiest Way to Get Healthier
References

Ondrusova K, Fatehi M, Barr A, Czarnecka Z, Long W, Suzuki K, et al. Subcutaneous white adipocytes express a light sensitive signaling pathway mediated via a melanopsin/TRPC channel axis. Sci Rep. 2017;7(1):16332.
Henninger AM, Eliasson B, Jenndahl LE, Hammarstedt A. Adipocyte hypertrophy, inflammation and fibrosis characterize subcutaneous adipose tissue of healthy, non-obese subjects predisposed to type 2 diabetes. PloS one. 2014;9(8):e105262.
Kim JI, Huh JY, Sohn JH, Choe SS, Lee YS, Lim CY, et al. Lipid-overloaded enlarged adipocytes provoke insulin resistance independent of inflammation. Mol Cell Biol. 2015;35(10):1686-99.
Press Release "Reduced sunlight may contribute to winter weight gain" Accessed April 4, 2020
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Old 06-03-2020, 10:44 PM   #2
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Interesting. And here I thought a tan always made me look more cut based on the illusion of being darker. I'm sure that plays a big role, but didn't know about the above. Good read.
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