Wikipedia
Emergen-C is an effervescent, powdered drink mix vitamin supplement manufactured by Alacer Corp. The Emergen-C product line was introduced in 1978. Alacer was established as a private company in 1972, focusing on vitamin supplements containing vitamin C. In 2012, the company was acquired by Pfizer.
It contains, depending on the varietypop, 16 times the vitamin C, 4 times the vitamin B, and 5 times the vitamin B of the USDA Reference Daily Intake based on a 2000 calorie diet. The efficacy of vitamin C megadoses as a cold remedy has not been firmly established in the scientific literature.
Emergen-C is available in a variety of flavors. Some flavors also include additional supplements, such as calcium, glucosamine, quercetin, or lycopene.