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The average person produces roughly one ounce (30 ml) of saliva every hour. That’s 24.3 ounces (720 ml) or one full wine bottle’s worth of saliva a day, which is an average of 69 gallons (263 liters) per year.
With the average global life expectancy being about 72 years, this means that you produce an average of 4,968 gallons (18,936 liters) of saliva in your lifetime – enough to fill 50 bathtubs!
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