A study conducted at Drexel University in Philadelphia suggests that consumption of soda and energy drinks declined almost immediately once a city-wide “soda tax” was implemented on January 1, 2017.
The researchers surveyed 900 Philadelphia residents just before and within two months after the tax went into effect. They found that, compared to residents of other nearby cities, Philadelphians were 40 percent less likely to drink regular soda, 60 percent less likely to have an energy drink, and 58 percent more likely to drink bottled water every day after the soda tax.
Consumption of other sugary drinks, like sweetened fruit juice beverages, did not decline, according to the researchers, even though they too fall under the tax. More research is needed to determine whether the soda tax has a long-term effect on soda and energy drink consumption.