Clinical Studies Database | Supplement Intelligence

Evidence-based summaries of human clinical research on supplements and ingredients. Each page compiles selected randomized trials, reviews, and key findings with PMID-linked references where available.

This database is designed as a curated research resource, not an exhaustive medical reference.

Ashwagandha Clinical Studies

Curated summary of human clinical research on ashwagandha (Withania somnifera), including studies on stress, cortisol, anxiety, sleep, testosterone-related outcomes, and physical performance.

Selected human trialsEvidence Grade: B+

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Berberine Clinical Studies

Curated summary of human clinical research on berberine, with emphasis on blood glucose regulation, lipid metabolism, and broader cardiometabolic health outcomes.

Selected human trialsEvidence Grade: A−

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NAC (N-Acetyl Cysteine) Clinical Studies

Curated summary of human clinical research on N-acetyl cysteine (NAC), including respiratory health, glutathione-related support, psychiatric applications, liver-related clinical use, and fertility-related outcomes.

Selected human trials and reviewsEvidence Grade: B+

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About This Database

This database prioritizes:

Human clinical research — randomized trials, systematic reviews, and meta-analyses are prioritized over animal or in vitro findings
PMID-linked references — cited studies are linked to the biomedical literature where available
Conservative evidence grading — clear distinction between stronger and more preliminary evidence
Practical study context — doses, durations, and outcomes are summarized from published research

This database is for educational purposes only and is not medical advice. Always consult a qualified healthcare professional before starting any supplement regimen.