Tryptophan News and Research

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Tryptophan is one of the 20 standard amino acids, as well as an essential amino acid in the human diet.

Lysophosphatidylcholines show gene-dependent effects in early Alzheimer’s disease

A new study presents robust evidence on the role of lysophosphatidylcholines (LPCs) in the onset of Alzheimer's disease. Researchers discovered that LPCs-compounds that transport a variety of healthy fatty acids to the brain-either promote Alzheimer's or protect against it, depending on a person's genetics.

17 Dec 2025

Supportive marriages may shape appetite control through oxytocin and the brain–gut axis

Supportive marital relationships are associated with lower BMI, fewer food addiction symptoms, higher oxytocin, stronger frontal brain responses to food cues, and favorable gut tryptophan metabolites. These coordinated social, neural, hormonal, and gut pathways suggest a plausible biological link between emotional support and healthier eating regulation.

8 Dec 2025

Emotional support in marriage associated with lower BMI and fewer food cravings

Strong social relationships, particularly high-quality marriages, may help protect against obesity by influencing a complex communication system between the brain and gut, according to new research by UCLA Health.

4 Dec 2025

Successful root canal treatment benefits metabolic and heart health

Successful root canal treatment could reduce inflammation linked to heart disease and improve levels of blood sugar and cholesterol.

18 Nov 2025

Longevity gene offers clues to extending life without restrictive diets

The pursuit of a longer life may currently be trending for tech bros, but the notion of a fountain of youth, or even immortality, has intrigued people for millennia.

6 Nov 2025

How gut microbes shape sleep: New review reveals microbiome clues to insomnia and apnea

A new Brain Medicine review maps how gut microbes influence sleep disorders, from insomnia and sleep apnea to circadian disruption, via bile acids, neurotransmitters, and immune pathways. The findings highlight gut-driven targets for improving sleep quality through diet, probiotics, and microbiome modulation.

5 Nov 2025

New review illuminates the intricate connections between gut microbiota and sleep regulation

A comprehensive review published today in Brain Medicine illuminates the intricate connections between gut microbiota and sleep regulation, establishing the microbiota-gut-brain axis as a critical pathway in understanding and potentially treating sleep disorders.

4 Nov 2025

Scientists explore why black rice deserves a bigger place in modern diets

Researchers reviewed the nutritional composition, therapeutic benefits, and industrial uses of black rice, highlighting its potential as a functional food. The study highlights the role of black rice in managing blood sugar, cholesterol, and inflammation, while also advocating for more robust human trials and sustainable cultivation methods.

2 Nov 2025

Exploring the gut-brain-immune axis in neurodegeneration

Neurodegenerative diseases (NDs), such as Alzheimer's disease (AD), Parkinson's disease (PD), amyotrophic lateral sclerosis (ALS), and multiple sclerosis (MS), represent a growing global health burden, particularly in aging populations.

28 Oct 2025

Tryptophan deficiency in breast milk may explain health challenges in children born to mothers with HIV

A new UCLA study reveals that breast milk from women living with HIV contains significantly lower levels of tryptophan, an essential amino acid likely important for infant immune function, growth, and brain development.

28 Oct 2025

Prenatal air pollution exposure tied to higher autism risk in children

A population-based study of over two million births in Ontario found that prenatal exposure to the sulfate and ammonium components of fine particulate matter (PM₂.₅) was associated with a higher risk of autism spectrum disorder. The risk was greatest during mid to late pregnancy and among infants in urban, lower-income neighborhoods.

26 Oct 2025

Gut bacteria found to make serotonin and boost intestinal motility

Researchers have identified Limosilactobacillus mucosae and Ligilactobacillus ruminis as human gut bacteria capable of producing serotonin by decarboxylating 5-hydroxytryptophan (5-HTP). Their activity enhances intestinal motility and enteric nerve density, linking microbial serotonin synthesis to gut function and potential IBS mechanisms.

21 Oct 2025

Genetic inflammatory signature defines depression subtypes and treatment response

Researchers led by Prof. Alessandro Serretti at Kore University of Enna have identified a genetic inflammatory signature that defines specific depression subtypes and influences how patients respond to antidepressant medications, according to new peer-reviewed research published today in Genomic Psychiatry.

21 Oct 2025

Drinking soft drinks may fuel depression by altering gut bacteria

A study links soft drink consumption to increased depression risk, highlighting gut microbiome changes, particularly in women. Learn more about the findings.

10 Oct 2025

Common food additives may trigger childhood asthma

Researchers utilize metabolomics to investigate the mechanisms underlying the association between food additives and childhood asthma.

6 Oct 2025

Research reveals molecular details of ME/CFS and long COVID

Patients with chronic fatigue syndrome/myalgic encephalomyelitis (ME/CFS) have heightened innate immune responses to bacteria, viruses, and fungi. While these responses are essential to fight infection, they can cause damage when unchecked.

1 Sep 2025

High protein diet linked to increased risk of cancer-associated venous thromboembolism

Next to cancer recurrence or progression, cardiovascular diseases are the leading causes of death in cancer survivors.

28 Aug 2025

Gut bacteria and insomnia influence each other in small but significant ways, study shows

Scientists used Mendelian randomisation to explore the two-way relationship between gut microbiota and insomnia, analyzing GWAS data from over 386,000 individuals and two major microbiome cohorts. The study found only limited taxa surviving strict correction, suggesting small but causal links that highlight the gut–brain axis in sleep health.

21 Aug 2025

Amino acid metabolism shapes the tumor immune microenvironment and therapy response

The tumor microenvironment is not just a site of cancer growth—it is a high-stakes metabolic contest where tumor and immune cells vie for limited resources.

17 Aug 2025

Gut bacteria may connect pregnancy diet to childhood autism

Unhealthy maternal diets may alter gut microbes, impacting brain development and increasing autism risk in offspring. Study the microbiome's influence.

8 Aug 2025