Citric acid is one of the most widespread acids among plants and is found in almost all fruits, wood, mushrooms, and even tobacco. Lemon juice contains 5% to 7%. It plays a central role in the metabolism of all living organisms; the human body produces about 2g per day and breaks it down again. It is known to be a powerful descaler (it removes limescale, cleans, and dissolves it) and a formidable antioxidant. Citric acid is completely biodegradable and is one of those basic household products that should be found in every home. Good to know: Made from plant-based raw materials (molasses). It is used to descale stainless steel, enamel, kettles, washing machines, and coffee makers. It can be used to combat rust. Produced and packaged in Western Europe. Kraft paper packaging. Fully biodegradable (OECD test).

Regulatory information: Hazardous. Follow safety precautions.