â¢ Lychee average yields range from 600 pounds per acre in an âoffâ year to 10,000 pounds per acre in a heavy-bearing year (economic average is 5,000 pounds per acre). With a pack-out of 70 percent and a price of $3 per pound, income from an acre of lychee averages approximately $10,000 (3).
Generally foods contain complex mixtures of polyphenols. According to a 2005 review on polyphenols: The most important food sources are commodities widely consumed in large quantities such as fruit and vegetables, green tea, black tea, red wine, coffee, chocolate, olives, and extra virgin olive oil.
There are many subgroups of polyphenols which include: lignans, flavonoids, and reservatrol. The chemical structure of polyphenols found in plant foods gives them a range of unique chemical and antioxidant properties, which can have many health benefits when we eat them. For example, the consumption of blueberries and strawberries is associated with delayed cognitive aging by as much as 2.5 years.