Low plasma selenoprotein P levels are associated with a higher risk of heart failure in a Swedish population [Jujic 2023].
Selenoprotein P is the primary protein transporter of selenium in the blood.
Plasma and serum selenoprotein P concentrations are useful biomarkers of selenium status in individuals with relatively low selenium intakes because selenoprotein P responds to different intake forms of selenium [Hurst 2010].
Selenium deficiency – defined as serum selenium concentrations below 70 mcg/L – has been associated with more severe symptoms of heart failure, poorer exercise capacity, and poorer quality of life. Sub-optimal serum selenium concentrations of 70–100 mcg/L have similar adverse associations, suggesting that values less than 100 mcg/L, might be considered abnormal [Bomer 2020].