UNDATED (WHDH) — Sweetened beverages — especially diet drinks have been linked to an increased risk for depression.

That’s according to researchers at the National Institutes of Health.

They tracked more than 250,000 adults, then followed up ten years later.

People who drank more than four cans of soda, iced tea or punch a day were at least 30-percent more likely to develop depression than those who drank none.

The risk was even greater for people who drank diet versions.

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