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.
Onions Are Polyphenol Superstars. Polyphenols are plant compounds recognized for their disease prevention, antioxidant, and anti-aging properties. Onions have a particularly high concentration, with more polyphenols than garlic, leeks, tomatoes, carrots, and red bell peppers. In particular, onions are especially rich in polyphenol flavonoids called quercetin.