How much salt is too much salt?

Most likely, the amount you're consuming.

A new study published this week in the journal JAMA found that cutting one teaspoon of salt a day results in a decline in blood pressure comparable to taking medication. Plus, other science news from this week, like the oldest confirmed black hole and how climate change and pollution are causing a big imbalance in the sexes of turtles.

Got other science news for us to consider? Email us at shortwave@npr.org.

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