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Emergen-C is an effervescent, powdered drink mix vitamin supplement manufactured by Alacer Corp. The Emergen-C product line was introduced in 1978.[1] Alacer was established as a private company in 1972, focusing on vitamin supplements containing vitamin C. The company was acquired by Pfizer in 2012. In 2019, Pfizer consumer healthcare entered a joint venture with GSK.[2][3] The brand is owned by Haleon since 18 July 2022.
It contains, depending on the variety, 16 times the vitamin C, 4 times the vitamin B12, and 5 times the vitamin B6 of the USDA Reference Daily Intake based on a 2000-calorie diet. Some versions include calcium, glucosamine, quercetin or lycopene.