Comparing PET scans of more than 90 adults with and without mild cognitive impairment (MCI), Johns Hopkins Medicine researchers say relatively lower levels of the so-called "happiness" chemical, ...

People with fewer happy chemicals in their brain might be at greater risk of neurodegeneration from Alzheimer's disease, according to new research. Of people with mild cognitive impairment, those with ...

Amy Mackelden is a freelance writer living with multiple sclerosis, ADHD, PCOS and anxiety. She's written about health and wellness for Healthline, The Paper Gown, SingleCare, the MS Society and ...

Serotonin reuptake inhibitors (SRIs) are a class of drugs that affect the brain’s serotonin system, and doctors most commonly prescribe them as antidepressants. SRIs increase the levels of serotonin ...

This post was written with a contribution from Margaret Heaton-Ashby, LMFT. Your nerve cells are constantly in a state of production to create the chemical serotonin, which is made from the essential ...

Serotonin is a neurotransmitter important for mood, digestion, and sleep. You can increase serotonin levels naturally through exercise and sunlight. Serotonin is a naturally occurring monoamine ...

You’ve probably heard about serotonin, the molecule known as the “happy hormone.” It’s widely thought to play a role in mood, sleep, learning, memory, digestion, and more—in fact, scientists think it ...