Not yet investigated
What we have so far
Glucose and sodium share a transporter, so adding sugar is what makes the salt absorb. Called the most important medical advance of the twentieth century by the Lancet.
This star is on the map because the show intends to take the question apart properly — the trials, how it is actually tested, whether the thing sold is the thing studied. That work is not done yet, and nothing here should be read as a conclusion. When the investigation is published it will appear on this page.