4:1 Extract Powder. Natural Source of Vitamin C plus added Ascorbic Acid. Acerola is an exotic fruit resembling cherries found in the tropical areas of the Americas and the Caribbean region. Apart from its Vitamin C content, Acerola also abounds with a broad range of anthocyanins, which are powerful free radical scavengers. NOW Acerola Powder is a 4:1 extract with high potency Vitamin C that tastes great!