Essential amino acids are organic compounds your body can’t produce on its own. The nine essential amino acids—histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, ...

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 ...

We’re unpacking the headlines and making the news make sense. Get connected with local experts, your neighbors and the stories shaping Chicago. May 18, 2026 • What’s That Building? Oh, just another ...

There was a long line outside the Chicago Board of Elections Monday morning. 'Our Chicago: Breaking Barriers' celebrates AANHPI Heritage Month Man charged in serious stabbing outside downtown ...