The tolerable upper intake levels (UL) for vitamin C are 400 milligrams daily for children 1-3 years old; 650 milligrams daily for children 4-8 years old; 1,200 milligrams daily for children 9-13 years old; and 1,800 milligrams daily for adolescents and pregnant and lactating females 14-18 years old.
120th Boston Marathon on April 18, 2016. DISTANCE: 26 MILES, 385 YARDS (42.195 KILOMETERS). The Boston Marathon is the world's oldest annual marathon and ranks as one of the world's most prestigious road racing events. The Boston Athletic Association manages this American classic, which is sponsored by John Hancock Financial Services. The Boston Marathon has distinguished itself as the pinnacle event within the sport of road racing by virtue of its traditions, longevity and method of gaining entry into the race (via qualification).
To qualify for the Boston Marathon, athletes must meet time standards which correspond to age and gender. For the 2019 Boston Marathon, qualifying times must be run on or after Saturday, September 16, 2017. The qualifying times below are based upon each athlete's age on the date of the 2019 Boston Marathon (April 15, 2019). Achieving one's qualifying standard does not guarantee entry into the event, but simply the opportunity to submit for registration.