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What’s the main ingredient in the fabled fountain of youth? Probably collagen. And, finally, Americans are realizing it. Sales of the ingredient are exploding as if somebody popped the cork on that fountain. Nutrition Business Journal analysts expect it to grow by 30 percent this year to reach an estimated $122 million in consumer sales in 2018. That follows 19 percent growth between 2016 and 2017. Researchers forecast $140 million in sales by 2019.

Yes, collagen is hot. So what is it, and what’s driving growth? Here’s a snapshot.

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