Theaflavins for Health & Longevity - Quick Reference Sheet
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Theaflavins for Health & Longevity

Created on 09/26/2026 – Quick Reference based on Evidence Review created using AI4L / Opus 5.5 – Audit

Theaflavins, reddish pigments formed during black tea making and sold as concentrated supplements, are used for heart, cholesterol, and exercise-recovery goals. Human evidence is thin: single small trials suggest less soreness after hard exercise and less body fat with more muscle. Cholesterol findings conflict; longer-life signals come only from cells, flies, and rodents. Risks appear low, mainly reduced plant-type iron absorption and caffeine in some products. (Full Review)

Protocol

Standard supplement doses
50–700 mg/day
50–100 mg once daily for body composition; 75 mg in a mixed tea extract for LDL; about 700 mg as two 350 mg doses for exercise recovery
Time of day
Morning to early afternoon
Suits caffeinated products; between meals protects iron absorption; with fat-containing meals targets cholesterol absorption
Food-first approach
2–4 cups black tea/day
Brewed without milk; a few to about 20 mg theaflavins per cup
Time to effect
Exercise recovery
About 1 week
Less soreness and higher sprint power at about 700 mg/day
Body composition & LDL
10–12 weeks
Timepoint at which changes were measured in trials
Blood vessel function
2–6 hours
After a single dose; effects are acute only

Benefits

Contraindications
  • Iron-deficiency anemia or ferritin below 30 ng/mL, until iron stores are restored
  • Pregnancy and breastfeeding
  • People receiving bortezomib
  • Known allergy to black tea, Camellia sinensis, or theaflavin
  • Liver disease with ALT above 3 times the upper limit of normal (concentrated extracts)
  • Children and adolescents under 18 years
    •
Key Interactions
  • Iron supplements and iron-rich meals (ferrous sulfate, iron-fortified cereals): Caution
  • Statins and other OATP2B1 substrates (rosuvastatin, atorvastatin): Monitor
  • Over-the-counter fexofenadine (antihistamine): Monitor
  • Anticoagulants and antiplatelets (warfarin, apixaban, clopidogrel): Monitor
  • CYP1A2 inhibitors (fluvoxamine, ciprofloxacin): Caution with caffeinated extracts
  • Over-the-counter stimulants (caffeine tablets, pseudoephedrine): Caution
  • Green tea extract and other catechin supplements: Caution
  • Lipid-lowering supplements (plant sterols, red yeast rice, berberine): Monitor
  • Blood pressure–lowering supplements (garlic, beetroot nitrate, magnesium): Monitor
  • Dairy milk and casein protein: Caution (reduced efficacy)
    •

Risk & Side Effects

  • High:
  • Medium:
  • Low: Reduced Non-Heme Iron Absorption; Transient Blood Pressure Rise; Caffeine-Related Adverse Events; Hypersensitivity Reactions
    •
  • Speculative: Liver Injury From Concentrated Tea Extracts; Blunted Training Adaptations; Pro-Oxidant Effects at High Doses
    •

Monitoring

Marker Target Why
LDL cholesterol <100 mg/dL (<70 mg/dL at higher risk) Main lipid target
ApoB <80 mg/dL Particle count
Ferritin 50–150 ng/mL Iron stores
Hemoglobin Men 14–16 g/dL; women 13–15 g/dL Anemia screen
Fasting glucose 75–90 mg/dL Glucose control
ALT <25 U/L Liver safety
hs-CRP <1.0 mg/L Inflammation
Home blood pressure <120/80 mmHg Vascular effect, caffeine safety
Creatine kinase No established target; track change from own baseline Muscle damage

Cadence: Baseline before starting; lipids, ferritin, and ALT at 8–12 weeks, then every 6–12 months; home blood pressure weekly for the first month, then monthly; soreness tracked session by session

Qualitative Assessment

  • Muscle soreness 24–48 hours after hard sessions (0–10 scale)
  • Recovery readiness and repeat-session performance
  • Energy levels and sleep quality (caffeine effects)
  • Digestive comfort
  • Signs of low iron: fatigue, cold intolerance, hair shedding, restless legs
Not medical advice. Educational distillation of a single evidence review. Confirm any decision with a qualified clinician, especially in the presence of prescription drugs or chronic conditions.