Supplement Scholar
Compound

Coffee

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

How it works. Caffeine antagonizes adenosine A2A; chlorogenic acids modulate glucose absorption.

What the research supports. 3 graded claims. Strongest: Reduces all-cause mortality (J-curve at 3–4 cups) (strong).

How much to take. Typical dose: 3–4 cups/d (300–400 mg caffeine).

Side effects and interactions. 1 medication interaction listed. Serious: Arrhythmia in susceptible.

Stacking. Pairs well with NAD+ precursor (NMN or NR), Omega-3.

Common forms. Available as Coffee, Decaf, Green coffee bean extract.

Key studies. 10 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Coffee. Anecdotes are not medical advice.

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

Key compound: caffeineC8H10N4O2 · 194.19 g/mol

What it is

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

Also called

Caffea arabicaChlorogenic acids

Food sources

Coffee beans

Goals

Energy ProductionHealthy AgingBlood Sugar Management

How it works

Caffeine antagonizes adenosine A2A; chlorogenic acids modulate glucose absorption.

Pathways

  • Adenosine antagonism
  • Glucose absorption

Effects

  • ↓All-cause mortality (3–4 cups) decreases
  • ↓T2D incidence decreases

What the research supports

Reduces all-cause mortality (J-curve at 3–4 cups)strong
Reduces T2D incidence ~30%strong
Reduces liver disease and HCCstrong

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
3–4 cups/d (300–400 mg caffeine)
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodWith a meal containing fat for fat-soluble compounds; otherwise either.
Best formMost evidence is based on the coffee form.
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Side effects & interactions

Common side effects

  • Insomnia
  • Anxiety
  • GERD

Serious

  • Arrhythmia in susceptible

Medication interactions

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

Caffeine competes.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • NAD+ precursor (NMN or NR)Complementary mitochondrial and sirtuin support.
  • Omega-3Lowers inflammation and supports membrane integrity.

Common forms

  • Coffee
  • Decaf
  • Green coffee bean extract

Key studies

10 studies cited in total.

Coffee consumption and all-cause mortality ↗
Meta-analysis · BMJ · 2017

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

PubMed: Coffee — Reduces all-cause mortality ↗
Systematic review · PubMed (NLM) · 2026

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

PubMed: Coffee — Reduces T2D incidence ~30% ↗
Systematic review · PubMed (NLM) · 2026

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

Discussion

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