does method contain optical brighteners?

method uses a brightening agent in our laundry detergent to improve performance, particularly for white laundry. our external materials review partner, EPEA, completed a comprehensive environmental and toxicological assessment of the ingredient and deemed it safe, non-toxic to people, not irritating to skin, not carcinogenic, not accumulative in the environment and biodegradable. the ingredient is made from synthetic materials and their use level is minimal (under 0.05%), we are confident in the safety of using it until a renewable alternative is developed.