Tryptophan News and Research

RSS

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

Researchers propose that Parkinson’s disease may start in the gut, not the brain

A perspective in The Journal of Clinical Investigation argues that environmental exposures may interact with the gut microbiome and intestinal barrier to trigger biological processes linked to Parkinson’s disease. The authors propose that cumulative environmental stressors can erode host resilience, promoting α-synuclein pathology, immune activation, and neurodegeneration.

5 Mar 2026

Periodontal bacteria trigger bone density reduction via the gut

Periodontitis, a chronic inflammatory disease of the gums, affects hundreds of millions of people worldwide and is increasingly linked to systemic disorders beyond the oral cavity.

4 Mar 2026

Living in deprived neighborhoods reshapes the gut microbiome

This study reveals links between socioeconomic deprivation and gut microbiome changes, highlighting potential pathways to mental and metabolic health issues.

2 Mar 2026

Chemotherapy-induced gut changes trigger anti-metastatic immune response

Chemotherapy commonly damages the intestinal lining, a well-known side effect. But this injury does not remain confined to the gut.

22 Jan 2026

Adding lean pork to a plant-forward diet supports healthy aging biomarkers

A randomized crossover feeding trial in adults aged 65 years or older found that plant-forward diets incorporating either minimally processed lean pork or lentils produced similar short-term improvements in cardiometabolic and neuroactive biomarkers. Both diets supported metabolic health and functional stability, with no overall adverse biomarker effects attributable to including minimally processed red meat within a Dietary Guidelines–aligned pattern.

19 Jan 2026

Gut microbiota analysis offers insights into how ultra processed foods affect health

To gain more knowledge about how ultra-processed food affects us, we need new research methods, claim researchers. Now they are looking to better understand our intestinal flora.

16 Jan 2026

Gut bacteria compound during pregnancy protects offspring from fatty liver disease

Children born to mothers who consume a high-fat, high-sugar diet during pregnancy and breastfeeding face a higher risk of developing fatty liver disease later in life.

14 Jan 2026

Targeting IDO1 for cancer: Novel degraders show promise in preclinical studies

Cancer cells employ a variety of strategies to evade the immune system, and modern immunotherapies aim precisely at these escape mechanisms.

9 Jan 2026

UC Davis team creates new class of serotonin-effecting drugs

UC Davis researchers have developed a new method that uses light to transform amino acids - the building blocks of proteins - into molecules that are similar in structure to psychedelics and mimic their interaction with the brain.

8 Jan 2026

Newly discovered molecules accelerate the removal of immune-modulating enzyme

Cells have a remarkable housekeeping system: proteins that are no longer needed, defective, or potentially harmful are labeled with a molecular "tag" and dismantled in the cellular recycling machinery.

7 Jan 2026

Research reveals how the gut microbiome supports successful pregnancy

Gut microbes may play a key role in training a mother's immune system to adapt to the developing fetus during pregnancy, according to a preclinical study by Weill Cornell Medicine investigators.

17 Dec 2025

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