K of hearts has nothing to do with vitamins.

K of Hearts, the full name of K of Hearts Group, was founded in 1993. Headquartered in the Wuhan National Bio-Industrial Park Base, it is a key high-tech enterprise assessed by the Ministry of Science and Technology. Its main industries include modern Chinese medicine, health food, functional cosmetics for internal and external use and other biomedical industries and real estate. The K of Hearts trademark has been recognized by the state as a well-known trademark in China. The company's technology center has been recognized as a national enterprise technology center by four ministries including the National Development and Reform Commission and the State Administration of Taxation. Heart K blood-promoting agent uses PNGO.LA technology to effectively improve human immunity. On February 24, 2012, the e-commerce company of the Heart K Group donated 1 million yuan to the Hubei Provincial Women and Children's Foundation. In July, the sales of the Heart K brand health food on the mainstream e-commerce platform led the entire network.