If a product contains bleach (peroxide), it will whiten your teeth. But not all treatments are created equal. It's the concentration or percent of hydrogen peroxide a teeth-whitening system contains and the amount of time it's in contact with your teeth that determines its effectiveness.
Definition of fecund - producing or capable of producing an abundance of offspring or new growth; highly fertile Definition of fecund - producing or capable of producing an abundance of offspring or new growth; highly fertile
Human feces (or faeces in British English; Latin: fÃ¦x) are the solid or semisolid remains of the food that could not be digested or absorbed in the small intestine, but has been rotted down by bacteria in the large intestine.