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.
Polyphenols are a group of plant-based chemicals that have at least one phenol group (don't ask me why we don't call some monophenols â I don't know). One broad type of polyphenols are phenolic acids including red fruits, black radishes, onions, coffees, cereals and spices. The second broad group are the flavonoids, including isoflavones found in soy, anthocyanidins found in berries and wine, flavones found in herbs, flavonols found in broccoli, tomato and tea, flavanones found in citrus fruits and juices, and flavan-3-ols found in cocoa, tea and wine.