Camu camu (lat. Myrciaria dubia) is a small, sour fruit native to the Amazon rainforest, particularly in regions of Peru and Brazil. It grows on a bushy tree that thrives in the swampy or flooded areas of the rainforest.
The fruit is roughly cherry-sized and has a purplish-red skin with a yellow pulp, bearing a resemblance to a large grape or a small plum. Camu camu is best known for its extraordinarily high vitamin C content, often cited as one of the richest natural sources of vitamin C in the world, surpassing many citrus fruits.
In addition to vitamin C, camu camu contains other antioxidants, amino acids, and compounds like flavonoids. Due to its sour taste, it's rarely eaten fresh but is commonly powdered for smoothies, juiced, used in supplements, or included in skincare products.