Research library · sources first

Follow the evidence all the way back to the research.

Browse papers, human trials, reviews, observational research, and mechanistic studies with direct links to PubMed, DOI records, or original sources. Grades and library-wide metrics are kept as context; the research itself comes first.

Source-first browsing

18 directly linked studies are surfaced below

They are grouped by study design so stronger clinical evidence is easy to distinguish from observational, mechanistic, and preclinical evidence. Supportive, mixed, null, and unfavorable findings are all eligible.

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Evidence synthesis

Systematic reviews & meta-analyses

Start here when you want research that evaluates multiple studies together. Review quality still depends on the studies included, but these sources help show the broader evidence picture.

Meta-analysis· 2025

Effects of Tea (Camellia sinensis) or its Bioactive Compounds L-Theanine or L-Theanine plus Caffeine on Cognition, Sleep, and Mood in Healthy Participants: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

L-theanine

Background evidence

DOI · 10.1093/nutrit/nuaf054
Meta-analysis· 2025

The Effects of Curcumin Plus Piperine Co-administration on Inflammation and Oxidative Stress: A Systematic Review and Meta-analysis of Randomized Controlled Trials

Curr Med Chem · Curcumin + piperine

Background evidence

PubMed · PMID 38561618
Meta-analysis· 2024

Effects of Artemisia absinthium on broiler chicken coccidiosis: a systematic review and meta-analysis

Avian Pathol · Artemisia Absinthium

Background evidence

PubMed · PMID 38616734
Meta-analysis· 2024

Effects of Ashwagandha (Withania Somnifera) on stress and anxiety: A systematic review and meta-analysis

Explore (NY) · Ashwagandha Withania somnifera

Background evidence

PubMed · PMID 39348746
Meta-analysis· 2024

Effects of chamomile (Matricaria chamomilla L.) on sleep: A systematic review and meta-analysis of clinical trials

Complementary Therapies in Medicine · Chamomile

Background evidence

Original source
Meta-analysis· 2024

Effects of Ginseng on Cognitive Function: A Systematic Review and Meta-Analysis

Phytotherapy Research · Asian Ginseng

Background evidence

PubMed · PMID 39474788

Human intervention research

Randomized & controlled trials

Direct links to intervention studies in people. These are especially useful for checking the tested population, preparation, dose, duration, comparator, and measured outcome.

Randomized controlled trial· 2025

Effect of a combination of C. longa and B. serrata extracts on hand osteoarthritis. Results of a double-blind, randomized, placebo-controlled, multicenter trial

Osteoarthritis Cartilage · Boswellia

Background evidence

PubMed · PMID 40554037
Randomized controlled trial· 2024

Understanding the Impact of Different Doses of Reducose(®) Mulberry Leaf Extract on Blood Glucose and Insulin Responses after Eating a Complex Meal: Results from a Double-Blind, Randomised, Crossover Trial

Nutrients · Mulberry Leaf

Background evidence

PubMed · PMID 38892603
Randomized controlled trial· 2023

Acute Effects of Naturally Occurring Guayusa Tea and Nordic Lion's Mane Extracts on Cognitive Performance

Nutrients · Guayusa

Background evidence

PubMed · PMID 38140277
Randomized controlled trial· 2023

Effect of Fucoxanthin on Metabolic Syndrome, Insulin Sensitivity, and Insulin Secretion

J Med Food · Fucoxanthin

Background evidence

PubMed · PMID 37405785
Randomized controlled trial· 2023

Effects of dietary fibers or probiotics on functional constipation symptoms and roles of gut microbiota: a double-blinded randomized placebo trial

Gut Microbes · Psyllium

Background evidence

PubMed · PMID 37078654
Randomized controlled trial· 2023

Efficacy of Andrographis paniculata spray in acute pharyngitis: A randomized controlled trial

Drug Discov Ther · Andrographis Paniculata

Background evidence

PubMed · PMID 37821383

Human context

Observational & clinical evidence

Human evidence outside controlled trials can reveal associations, real-world patterns, and clinical signals. It can be informative without establishing causation on its own.

Case report

PMID 41710586

Moringa

A 2026 narrative review mapped 22 clinical trials and 9 published case reports. Human findings were heterogeneous and preparation-specific; the review describes generally good tolerability but notes rare hyp…

Background evidence

PubMed · PMID 41710586
Case report

Published case reports describe acute hepatitis temporally associated with noni products. The signal is low-incidence/uncertain-causality but clinically relevant enough to retain a liver caution.

Noni

Published case reports describe acute hepatitis temporally associated with noni products. The signal is low-incidence/uncertain-causality but clinically relevant enough to retain a liver caution.

Background evidence

PubMed · PMID 16094725

How it might work

Mechanistic & preclinical research

Animal, in-vitro, and mechanistic studies can explain plausible pathways and generate hypotheses. They belong in the evidence map, but they are intentionally kept separate from proof of a human benefit.

Mechanistic research· 2025

In Vitro Evaluation of Bioavailability of Mg from Daily Food Rations, Dietary Supplements and Medicinal Products from the Polish Market

Magnesium glycinate

Background evidence

DOI · 10.3390/nu17050748
Mechanistic research· 2018

The Purified Extract from the Medicinal Plant Bacopa monnieri, Bacopaside II, Inhibits Growth of Colon Cancer Cells In Vitro by Inducing Cell Cycle Arrest and Apoptosis

Cells · bacopaside ii

Background evidence

PubMed · PMID 30037060
Mechanistic research

A Passiflora incarnata extract exerts multi-target effects on selected sleep-related receptors

Passionflower

The extract showed activity at adenosine A1/A2A and 5-HT2A-related targets and inhibited monoamine uptake in vitro.

Background evidence

PubMed · PMID 42462921
In-vitro research

A 2025 study reported sleep-related enzyme/pathway effects in cell models using longan flower ethanol extract. It is not human sleep evidence and is plant-part specific, so it should be labeled mechanistic/preclinical rather than a clinical benefit.

Longan

A 2025 study reported sleep-related enzyme/pathway effects in cell models using longan flower ethanol extract. It is not human sleep evidence and is plant-part specific, so it should be labeled mechanistic/p…

Background evidence

PubMed · PMID 40722663

Research tools

Move from question → evidence → source

Independent research databases

Verify beyond The Hippie Scientist

Good research should be easy to check elsewhere. These external databases are useful for finding primary papers, trial registrations, reviews, and government evidence summaries.

Library context · dataset v2026.08.16

The numbers belong here — as context

Open the full Evidence Report →

922

deduplicated structured study records

282

human-evidence source records

922

study records with a direct PubMed, DOI, or source URL