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evidence · mechanism · dose
Supplements/Compound

Coffee

aka Caffea arabica · Chlorogenic acids

Caffeine + polyphenol matrix with strong evidence for mortality and T2D reduction.

Energy ProductionHealthy AgingBlood Sugar Management

Overview

Caffeine + polyphenol matrix with strong evidence for mortality and T2D reduction.

Natural sources
  • Coffee beans
Common forms
  • Coffee
  • Decaf
  • Green coffee bean extract

Mechanism of action

Caffeine antagonizes adenosine A2A; chlorogenic acids modulate glucose absorption.

Pathways
  • · Adenosine antagonism
  • · Glucose absorption

Effects on the body

Decreases
All-cause mortality (3–4 cups)
Decreases
T2D incidence

Organ system effects

Liver

Reduces cirrhosis and HCC incidence.

Evidence-based benefits

Reduces all-cause mortality (J-curve at 3–4 cups)

Strong evidence

Reduces T2D incidence ~30%

Strong evidence

Reduces liver disease and HCC

Strong evidence

Potential side effects

Common
  • · Insomnia
  • · Anxiety
  • · GERD
Rare
    Serious
    • · Arrhythmia in susceptible

    Drug interactions

    CYP1A2 substrates (e.g., theophylline, clozapine)
    Caffeine competes.
    moderate

    Supplement interactions

    Pairs well with

    None listed.

    Avoid combining with

    No specific avoidances listed.

    Dosing & bioavailability

    Typical dose
    3–4 cups/d (300–400 mg caffeine)

    Where to buy

    Affiliate-style search links to reputable retailers. We don't endorse specific brands — verify third-party testing (USP, NSF, Informed Sport) before purchase.

    Compound
    Coffee
    Amazon
    Wide selection · fast shipping
    Compound
    Coffee
    iHerb
    Global delivery · curated brands
    Compound
    Coffee
    Thorne
    Practitioner-grade · NSF tested

    Scientific evidence (10)

    Meta-analysisBMJ · 2017

    Coffee consumption and all-cause mortality

    Poole R, et al.

    Umbrella review of 218 meta-analyses of coffee outcomes.

    Key findings

    3–4 cups/d associated with 17% lower all-cause mortality.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coffee — Reduces all-cause mortality

    Live PubMed search

    Live results for "Coffee Reduces all-cause mortality" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coffee and "Reduces all-cause mortality". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coffee — Reduces T2D incidence ~30%

    Live PubMed search

    Live results for "Coffee Reduces T2D incidence ~30%" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coffee and "Reduces T2D incidence ~30%". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coffee — Reduces liver disease and HCC

    Live PubMed search

    Live results for "Coffee Reduces liver disease and HCC" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coffee and "Reduces liver disease and HCC". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coffee — randomized controlled trial

    Live PubMed search

    Live results for "Coffee randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coffee and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coffee — meta-analysis

    Live PubMed search

    Live results for "Coffee meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coffee and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coffee — pharmacokinetics

    Live PubMed search

    Live results for "Coffee pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coffee and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coffee — safety adverse events

    Live PubMed search

    Live results for "Coffee safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coffee and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coffee — dose response

    Live PubMed search

    Live results for "Coffee dose response" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coffee and "dose response". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewGoogle Scholar · 1970

    Google Scholar: Coffee — clinical evidence

    Live Scholar search

    Cross-database citation index for Coffee as it relates to "clinical evidence".

    Key findings

    Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.

    Open study
    Educational use only. This profile is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you take prescription medication or have a chronic condition.