Study suggests one common amino acid may affect how long men live
A large new study suggests that higher levels of a common amino acid called tyrosine may be linked to a shorter lifespan in men.
Feb 27, 2026
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Organic Chemicals: News and Research on Dopamine
MeSH tree: D02.455.426.559.389.657.166.175.342
Dopamine selects, astrocytes refine: A new mechanism for motor-learning circuit rewiring
When we learn a new motor skill—whether mastering a piano passage or refining balance while walking—the brain must reorganize the circuits that control movement. For decades, this process of synaptic remodeling has been attributed ...
Feb 24, 2026
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What causes depression? What we know, don't know and suspect
Depression is a complex and deeply personal experience. While almost everyone has periods of sadness, low mood or grief, depression is different. Major depressive disorder is persistent, interferes with day-to-day activities, ...
Feb 22, 2026
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Study finds tirzepatide cuts alcohol intake by more than half in rodents
For the first time, researchers show that tirzepatide—the active ingredient in the diabetes and weight-loss drug Mounjaro—reduces alcohol intake as well as relapse-like behaviors in rats and mice. The findings are considered ...
Feb 20, 2026
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Our brains may learn more from rare events than from repetition
More than a century ago, Pavlov trained his dog to associate the sound of a bell with food. Ever since, scientists have assumed the dog learned this through repetition. The more times the dog heard the bell and then got fed, ...
Feb 18, 2026
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Do positive affirmations work? A psychologist unpacks the evidence
Scroll through social media and you'll quickly encounter phrases like "I am worthy" or "I choose happiness."
Feb 15, 2026
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Why does having a crush make you feel crazy?
The feeling starts in your nervous system. Your pupils dilate, you become short of breath, sweat collects on your palms, and suddenly you can't eat a bite. You're in love—or in lust, at the very least. It's what psychologist ...
Feb 12, 2026
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Stem cell brain implants aim to replace dopamine cells in Parkinson's trial
Parkinson's disease is a progressive neurodegenerative disorder that affects more than one million people in the United States, with approximately 90,000 new cases diagnosed each year. Although available treatments can help ...
Feb 5, 2026
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Sweet reset: How sugar tastings help the brain quiet old memories
Memories must be flexible so animals can adapt when the world changes. FMI neuroscientists have found that in fruit flies, simply tasting a sugar reward again can weaken all previous associated memories. This process may ...
Feb 5, 2026
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Addiction and appetite along the gut-brain axis: Vagus nerve may play a crucial role in the dopamine reward pathway
Dopamine—a neurotransmitter responsible for influencing motivation, pleasure, mood and learning in the brain—has experienced a bit of fame in recent years, acting as a sort of buzzword to describe a fleeting satisfaction ...
