A cinema favourite snack could be the secret to a long life, according to s longevity expert. Dan Buettner claims popcorn is the 'best snack to live to 100', citing its high fibre and polyphenol content, affordability, ease of preparation, and storage convenience as reasons for its 'longevity snack' status. Buettner has gained fame through his research into Blue Zones - regions around the world where people enjoy unusually long and healthy lives. These zones are scattered globally, from Okinawa