BS!!!
One year I was one point from failing my flight physical and going on a salt free diet for one month lowered my blood pressure 8 points.
Are you sure your diet didn’t include either a separate, unnoted “reduction”, or an increase in something else to help?
I don’t believe alot of hogwash about what we should or shouldn’t eat. Many things have pros and cons and in the end, it doesn’t matter. It all evens out.
The accuracy of a blood pressure test is +/- 20 points.
You experienced no change in a statistically significant sense.
In undergraduate school I worked in a foundry during summer breaks and all water fountains had dispensers for salt tablets to replenish salt lost through. Gatorade serves the same purpose for players durig hot and humid weather. Also sodium is excreted through urination.