Summary
Overview
Michael Stevens and Hannah Fry explore the science behind collagen supplements, examining the marketing claims, manufacturing process, and actual evidence for their effectiveness. Hannah investigates whether these expensive supplements derived from animal byproducts actually deliver on their promises for skin, joints, and overall health, while Michael shares insights about collagen from his barbecuing experience. The episode also features discussion of Ig Nobel Prize winners and listener questions about mathematics and chemistry.
The Collagen Supplement Industry and Manufacturing
Hannah introduces collagen supplements as a massive wellness trend, revealing that these products are manufactured from animal byproducts like donkey skins, cow hooves, and chicken feet. She explains that collagen makes up 30% of protein in the human body and provides structural support to skin, joints, and bones, but naturally declines with age. The supplement industry has turned what would be waste products from meat processing into a lucrative business by positioning them as anti-aging solutions.
- Collagen is a protein that provides structural support to skin, bones, joints, and tendons, making up 30% of human body protein
- As people age, their ability to produce collagen naturally declines, creating demand for supplements
- The collagen supplement industry processes animal byproducts (donkey skins, cow hooves, chicken feet) using hydrochloric acid and high-pressure steam
- Gelatin in gummy candies like Haribo is essentially the same molecule as collagen, just processed differently
" If eating collagen was the thing that allowed you to make collagen, then babies and vegans would have a problem because they're not, if you do not have any meat in your diet, then you are eating no collagen whatsoever "
How Collagen Digestion Actually Works
Michael explains his knowledge of collagen from barbecuing, where slow cooking breaks down collagen into delicious liquid. Hannah reveals that when consumed, stomach enzymes break down collagen proteins into small peptide chains rather than keeping them intact. The supplement industry argues these peptides act as signaling molecules, potentially triggering the body to produce more collagen, rather than directly providing usable collagen to tissues.
- Collagen breaks down during cooking, especially at higher temperatures, which is key to barbecuing
- Stomach enzymes break down ingested collagen into short chains of amino acids called peptides
- The industry claims these peptides act as signaling molecules that trigger the body to produce more collagen
- Babies and vegans successfully produce collagen from non-collagen sources, showing the body can synthesize it
" It's not that the collagen itself is the thing that's getting there, but it's sending the signal to make more "
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