Another n=1. I've been on 2 blood pressure pills for 2 years I was reading about very low sodium diets, and decided to start an experiment on Thursday. Eating only unprocessed foods, non-dairy/meat/fish. I dropped the diuretic pill at the beginning, and have now dropped the ARB medication. Gone from average 140/95 to 124/84 in 4 days.
It seems possible that there are widely varying responses, and for those like me who are salt sensitive, then low sodium may mean 500mg rather than 1500/2250mg that various research suggests. In hunter/gatherer societies, 500mg would be a more typical level one would receive - this research refers to 4 tribes with lowest sodium intake (& lowest BPs) in INTERSALT study. http://publicacoes.cardiol.br/abc/2003/8003/80030005i.pdf.
Also, came across, an article which mentioned no other animal has a sodium potassium balance with more sodium than potassium which is what most humans in 'modern' world now have.