: Produced in the adrenal glands and hypothalamus, it circulates in the blood at very low levels. Levels naturally rise during physical exercise or times of high salt intake. Modern Research & Potential Uses
: This sodium buildup forces the cell to retain more calcium. In heart muscle cells, this extra calcium strengthens contractions.
While once thought to be exclusively plant-based, scientists discovered that humans and other mammals produce an version of ouabain.
