http://www.zipfizz.com/faq.html
WHAT’S IN IT?
Zipfizz contains 25 nutritional ingredients:
9 VITAMINS: vitamins C, E, all the Bs, and folate
8 MINERALS: potassium, magnesium, calcium, zinc, selenium, manganese, chromium, sodium
ELECTROLYTES: magnesium, potassium
AMINO ACIDS: arginine, taurine
ANTIOXIDANTS: green tea extract, vitamins C and E
THE 4 G’S: Grape seed extract, Ginger, Green tea and Ginseng
DOES IT HAVE CAFFEINE?
Yes. It has 100 mgs of caffeine from natural sources of green tea and Guarana. That’s
about one-fourth the caffeine in a Tall Starbucks coffee (375 mg) and less than two
Excedrin tablets (130 mg).
HOW IS IT SWEETENED?
Zipfizz contains no sugar. With only 10 calories, it is sweetened with Xylitol (pronounced
“Zy-le-tall”) and Sucralose. Xylitol is a naturally occurring, low-calorie sugar substitute
found in berries, fruits and birch bark. Many dentists recommend chewing Xylitol gum for
good dental health. The average person produces 6-10 grams a day of Xylitol, it is a by-
product of sugar metabolism.
Reading this, it's hard to see any value for tennis players during or pre/post match.