Didn't people already know this? This is like those scientists a bit back who thought they'd discovered something new with regards to combustible engines, but what they discovered had been used by the automobile industry for years.
I remember I was fifteen or something back when I first heard that dark chocolate was good for you.
However, I also note there's much less detail on these "Kuna" than I would have liked. Do they eat as much fast food as first-world people? Drink as much soda? Eat as many microwaveable meals? If we're talking some sort of indigenous people, I think that's far more likely.
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