Ear protection should be worn to decrease the noise volume during the use of these items. Lower levels of noise, if sustained over long periods, may be adequate to produce permanent ear damage. Very loud brief noises such as firecrackers or shotguns may also cause permanent partial hearing loss. The use of some drugs increases the risk of noise-induced hearing loss. The young women in the study group reported increased levels of sleepiness following the intake of sugar-sweetened beverages.
Physical inactivity leads to decreased cerebral blood flow.
A study comparing the use of Plax and a plain water mouthrinse before toothbrushing revealed no difference in the amount of plaque removed. A study from France revealed a significant relationship between the intake of fresh meat, dairy products and cereals, and the low intake of cruciferous vegetables, and colorectal cancer. A recent study showed no differences in low birth weight infants born with the use of episiotomy and those born without the use of an episiotomy. Mothers often suffer significant discomfort from episiotomy, and may have permanent sequelae. MILK Plant toxicants consumed by cows may be excreted in the milk and consumed by milk drinkers.