Medical Notes: The Science Behind Your ‘AURA’, The Fluoride Debate, And The Real Reason Behind Your Yawn

Your ‘aura’ may just be a mixture of oils and fats on the skin.

Scientists have discovered that perfumes, lotions, and personal products interact with what’s called our “human oxidation field.” It’s a constant cloud of molecules we emit that can negatively interact with our environment and worsen our air quality. Interestingly, research in Science Advances shows that fragrances can suppress this effect. (UV Irvine)

Scientists still don’t fully know why we yawn—but they’re getting closer.

It turns out, yawning isn’t just about boredom or tiredness. Researchers now think yawning helps prepare us to change from a state of low activity to high activity. For example, when you wake up and yawn, it’s anticipating your move to get up and moving. However, a lot is still unknown and researchers hope to soon understand the connection between yawning and empathy. (University of Miami)

The debate over fluoride is back in the spotlight.

It’s been a practice in American to help prevent tooth decay, so why are some states banning it? Well, the measurements are super important. Not adding enough fluoride to drinking water can lead to cavities, but adding too much can cause tooth and bone issues. Experts say the decision to add fluoride to drinking water should be region-specific and science-based. (Syracuse University)

Urban rats may be more than just an annoying pest.

New research in the journal Plus Neglected Tropical Diseases reveals that city rats are a big threat to public health. They spread deadly bacteria through urine that gets into the soil, water, and nearby environment. Since it’s not realistic to get rid of all rats, researchers are focusing on how to best control their reproduction and migrations. (Tufts University)

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