- Written by Jay L. Hoecker, M.D.
Vicks VapoRub doesn't relieve nasal congestion. But the strong menthol odor of VapoRub tricks your brain, so you feel like you're breathing through an unclogged nose. By contrast, decongestant tablets and nasal sprays sold over-the-counter appear to narrow blood vessels in the lining of your nose, leading to reduced swelling in your nasal passages.
- Written by Thomas J. Salinas, D.D.S.
Whitening toothpaste can appear to whiten teeth slightly by removing surface stains, such as those caused by drinking coffee or smoking. However, whitening toothpastes can't change the natural color of your teeth or lighten a stain that goes deeper than a tooth's surface.
- Written by Vivien Williams
Childhood asthma has made headlines in recent years because of an upward trend in the number of cases. That may have changed. A government study published in the journal Pediatrics, shows asthma rates may be leveling off or declining, but not for poor children. Researchers at the National Center for Health Statistics looked at asthma rates between 2001 and 2013 and found rates increased until 2009 when they plateaued. Then in 2013 rates began to decline except for children in poverty.
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