Yes—dementia risk began rising around 141 mmol/L, even within the normal blood sodium range. Researchers examined Sodium (Blood) and other measures of the body's water balance in two large groups. One included 13,535 people from the Atherosclerosis Risk in Communities study. The other included 395,802 people from Israel’s Leumit Health Services. Follow-up lasted up to 30 years. Both groups showed a similar pattern. Risk began rising near the middle of the normal range. At the upper end and beyond, risk reached 1.5 to 3 times higher across the measures studied. The rise was not steady at every level. Researchers also checked values adjusted for blood sugar and another measure of blood concentration. This was a link, not proof of cause. The study did not test whether drinking more water prevents dementia. It also does not make 141 mmol/L a personal danger line. The reported numbers describe patterns across large groups, not anyone’s individual future. For BioSocial members, this adds context to a familiar bloodwork result. This marker reflects the body’s balance of salt and water. It is not a direct measure of how much salt someone eats. Kidneys and hormones help manage that balance, too. Tracking results over time alongside Hydration habits could make community comparisons more useful. Members can compare repeated results and notes about their routines, rather than treating one reading as a verdict. The takeaway is a reason to notice patterns, not chase a lower number. What patterns have you noticed in your results over time, alongside changes in your drinking habits?