I think a lot of people don't realize that the impact of sodium and other "bad stuff for you" varies from person to person. Only 25% of the population is subje

I think a lot of people don't realize that the impact of sodium and other "bad stuff for you" varies from person to person. Only 25% of the population is subject to high blood pressure as a result of high sodium intake. So, if you create an experiment that can subtly select for the 75% of the population doesn't experience high blood pressure, then you can show that sodium doesn't raise it. I don't if that's what's going on here but a lot interested parties will try to go this route in order to show that salt is harmless.