Internet sales of mushroom substrates for edible mushrooms. We offer grain mushroom seedlings, mushrooms for growing on wood, mushroom food supplements, mushroom books and mushroom accessories. We also offer mushroom knives, baskets, thermometers and hygrometers, and soaps.

The company was founded in October 2019, as a manufacturer and supplier of the unique pharmaceutical raw material OxaNatin. Zaretis aims to bring the natural substance OxaNatin to the market in the form of dietary supplements. This effort is fulfilled by the Zaretis 150 mg product line.