Acerola cherry (scientific name: Malpighia emarginata DC.), also known as Barbados cherry or Acerola, belongs to the Malpighiaceae family. This fruit is considered one of the richest natural sources of ascorbic acid in the world, with a content of 1000 to 4500 mg/100 g. The recommended intake (RDA) of ascorbic acid for adults (19 years old) is 75 mg/day for women and 90 mg/day for men. Ascorbic acid is one of the most important water-soluble vitamins and is essential for the biosynthesis of collagen, carnitine, and neurotransmitters. Most animals and plants can synthesize ascorbic acid, but humans cannot because of the non-functional state of L-gulonic acid-1,4-lactone oxidase, which catalyzes the last step of ascorbic acid biosynthesis in animals. It is reported that vitamin C in acerola cherry is more easily absorbed by the human body than synthetic ascorbic acid. Their results suggest that certain components in acerola cherry juice are beneficial to the absorption and excretion of ascorbic acid. When the intake of vitamin C reaches 100 mg/day, it is easily absorbed by the human body.