Heart disease refers to any problem affecting the heart, such as coronary artery disease, arrhythmia, and heart failure. Symptoms and treatments depend on the type of heart disease someone has. Heart ...
Serotonin is a neurotransmitter and hormone that helps regulate mood, sleep, digestion, blood clotting, and sex drive. Your body makes it from tryptophan, an amino acid found in meat, dairy, eggs, and ...