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.
Quite simply, polyphenols are naturally occurring compounds found in fruits, vegetables, spices and other plants and food sources. At least one study has shown a decreased mortality rate associated with higher consumption of dietary polyphenol intake. The best source of polyphenols is from foods that naturally contain them, rather than from supplements, according to the American Journal of Clinical Nutrition. Here is a list of fruits and vegetables that are naturally high in polyphenols.