In excess levels, nutrients overstimulate the growth of aquatic plants and algae.

Graves disease causes the thyroid to produce excess levels of hormones.

The white clipper is a circuit which clips out the excess level of video signal.

"But the excess levels of reproductive hormones are not in themselves the cause of this problem," Klass said.

In April she underwent radioactive treatment to shrink the thyroid gland, which had been producing excess levels of hormones.

However, the quality of the water has been declining over recent years due to excess levels of nitrogen and phosphorus.

Infrared observations of this star showed an excess level of radiation equal to about 0.5 magnitudes.

With excess levels rising sharply, buying insurance has become a minefield.

The objective is to decrease excess levels of cholesterol to an amount consistent with maintenance of normal body function.

Deficient or excess levels of minerals can also have serious health consequences.