Kaempferol for Health & Longevity - Quick Reference Sheet

Kaempferol for Health & Longevity

Created on 06/18/2026 – Quick Reference based on Evidence Review created using AI4L / Opus 4.8 Audit

Kaempferol is a common plant antioxidant in leafy greens, brassicas, capers, and tea. People eating more of it tend to live longer with less heart disease and cancer, though this tracks with healthier diets overall. Lab and animal work is promising, but supplement benefits in people remain largely unproven and absorption is poor. (Full Review)

Protocol

Dietary-first
5–15 mg/day from food
Leafy greens, brassicas, capers, tea
Supplemental dose
10–50 mg/day
Often in multi-flavonoid formulas; no validated therapeutic dose
Timing & dosing
Split across meals with fat
Short half-life favors divided dosing; fat aids poor absorption
Time to effect
Mortality / Longevity
Years
Dietary benefit accrues over years, not weeks
Exercise oxygen economy
Acute
Single 10 mg dose before exercise in one trial

Benefits

Contraindications
  • Pregnancy or breastfeeding (no safety data)
  • Significant hepatic impairment (Child-Pugh Class B or C)
  • Perioperative period (stop ~1–2 weeks before surgery)
  • Active cancer treatment without oncologist input
  • Hormone-sensitive cancers
Key Interactions
  • Prescription drugs via CYP3A4, CYP2C9, CYP1A2 (some statins, calcium-channel blockers, chemotherapy agents)
  • Anticoagulant/antiplatelet drugs (warfarin, direct oral anticoagulants, aspirin, clopidogrel)
  • OTC medications (NSAIDs such as ibuprofen, naproxen)
  • Other flavonoids/polyphenols (quercetin, fisetin, EGCG)
  • Supplements with additive antiplatelet effects (fish oil, high-dose vitamin E, ginkgo, garlic extract)
  • Narrow-therapeutic-index medications

Risk & Side Effects

  • High:
  • Medium:
  • Low: Drug-metabolism interactions; gastrointestinal upset at high supplemental doses
  • Speculative: Pro-oxidant and pro-apoptotic effects at high concentrations; hormonal effects; bleeding risk via platelet effects

Monitoring

Marker Target Why
hs-CRP < 1.0 mg/L Tracks systemic inflammation, the pathway kaempferol is proposed to act on
Fasting glucose 70–90 mg/dL Screens metabolic health given preclinical blood-sugar effects
HbA1c < 5.4% Reflects 3-month average blood sugar; context for metabolic claims
ALT / AST ALT < 25 U/L (men < 30); AST < 25 U/L Liver is the main site of metabolism; screens for hepatic stress with concentrated supplements
Lipid panel (LDL-C, HDL-C, triglycerides) Triglycerides < 80 mg/dL; HDL-C > 50 mg/dL; LDL-C context-dependent Context for cardiovascular benefit hypothesis
CBC with platelets Platelets 150–400 ×10⁹/L Relevant if combined with blood-thinning drugs given theoretical antiplatelet effect

Cadence: Baseline, then re-check at 8–12 weeks after starting a concentrated supplement, then every 6–12 months

Qualitative Assessment

  • Energy levels and exercise tolerance
  • Recovery and perceived inflammation (joint comfort, soreness)
  • General well-being and any gastrointestinal tolerance issues
  • Any unusual bruising or bleeding