Clinical nutrition (Edinburgh, Scotland)May 17, 2024

5-Hydroxytryptophan supplements and their effects on sleep quality and gut bacteria in older adults

Gut-Brain Axis Weekly Brief ↗PubMed ↗DOI ↗

Updated Apr 1, 2026

Full Text

Full text is available at the source.

View Full Text ↗

Funding

Competing interests

Conflict of interest None.

PubMed

Weekly Gut-Brain Axis Brief

You found one interesting study. We’ll send the next 7.

Get 7 new gut-brain axis papers each week, explained in plain English with direct links to the originals.

What Lands in Your Inbox Each Week:

📚7 fresh studies
📝plain-language summaries
✅direct links to original studies
🏅top journal indicators
📅weekly delivery
🧘‍♂️always free

Recent issues from the gut-brain axis brief

Gut viruses may shape brain health — and scientists are just starting to map how

5 days ago7 studies

Your gut bacteria may be steering Alzheimer's and Parkinson's through a molecular relay system

1 week ago7 studies

Probiotics cut a key Alzheimer's protein in older adults with early memory problems

2 weeks ago7 studies

A gut bacterium blocked cadmium's brain damage in mice — without touching metal levels

3 weeks ago7 studies

Oyster shells, Korean rice wine, and a probiotic: gut-brain science got weird this week

4 weeks ago7 studies

Fecal transplants in twins with autism improved symptoms — and the gut microbiome shifted too

5 weeks ago7 studies

Microplastics you swallow can damage your brain without ever reaching it

6 weeks ago7 studies

Your gut microbiome might reveal whether your depression is heading toward Parkinson's

7 weeks ago7 studies

A fiber supplement restored brain chemical balance in mice with vascular cognitive impairment

8 weeks ago7 studies

CBD nanoparticles engineered to cross the blood-brain barrier improved cognition in an Alzheimer's mouse model

9 weeks ago7 studies

explore the archive

See more issues from the gut-brain axis brief