Cyanidin-3-Glucoside for Health & Longevity - Quick Reference Sheet
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Cyanidin-3-Glucoside for Health & Longevity

Created on 09/08/2026 – Quick Reference based on Evidence Review created using AI4L / Opus 5 – Audit

Little of this common plant pigment reaches the blood unchanged. The clearest human signal is arteries widening better; a narrower one is restored blood sugar handling where it is already impaired. Blood fat, weight, liver, memory and recovery claims fade once all trials are counted. Safety unremarkable; stomach upset and mislabeled products are the practical concerns. (Full Review)

Protocol

Standard dose
160 mg twice daily
Purified berry anthocyanins, the schedule used in the diabetes and dyslipidemia trials. Isolated cyanidin-3-glucoside products typically supply 10–100 mg.
Best time of day
Split morning and evening with meals
For exercise use, blackcurrant anthocyanin protocols place a 105–210 mg dose one to two hours before the session rather than dividing it.
Competing approach — food first
50–200 mg daily from berries and black rice
Argued on the basis that pooled trials show benefit at dietarily achievable doses. Neither approach is established as superior.
Time to effect
Artery dilation
1–2 hours
Improves within one to two hours of a single dose.
Glucose tolerance
12 weeks
Confined to impaired glucose regulation; healthy adults register vascular rather than metabolic effects.
Inflammatory and metabolic markers
6–12 weeks
Trials needed 6 to 12 weeks before these markers moved.

Benefits

Contraindications
  • Documented allergy or anaphylaxis to the source berry (bilberry, blackcurrant, elderberry, black rice)
  • Pregnant or breastfeeding women
  • Surgery scheduled within 14 days
  • Bleeding disorder or platelet count below 50 × 109/L
  • Insulin-treated diabetes with hypoglycemia unawareness, unless glucose is actively monitored
    •
Key Interactions
  • Warfarin and direct oral anticoagulants (apixaban)
  • Antiplatelet drugs (clopidogrel)
  • Insulin and insulin secretagogues (glipizide)
  • Other glucose-lowering agents (metformin)
  • Over-the-counter aspirin and NSAIDs (ibuprofen)
  • Over-the-counter iron salts (ferrous sulfate)
  • Supplements with additive antiplatelet effects (fish oil)
  • Supplements with additive glucose-lowering effects (berberine)
  • Supplements with additive vascular effects (dietary nitrate)
  • Other interventions (antioxidant stacks, therapeutic plasma donation)
    •

Risk & Side Effects

  • Low: Gastrointestinal intolerance; additive blood-glucose lowering; adulterated or underdosed products
    •
  • Speculative: Hypersensitivity to berry-derived extracts; increased bleeding tendency with antithrombotic drugs; blunted adaptation to endurance training; reduced plant-source iron absorption
    •

Monitoring

Marker Target Why
High-sensitivity C-reactive protein Below 0.5 mg/L Primary inflammation target and the strongest predictor of who responds
Fasting glucose 75–86 mg/dL Tracks the best-supported metabolic effect
Hemoglobin A1c 4.8–5.3% Three-month average blood sugar, the endpoint moved in animal work
Fasting insulin 2–5 µIU/mL Detects insulin-sensitivity change earlier than glucose
Apolipoprotein B Below 80 mg/dL Tests the contested lipid claim honestly, counting particles rather than cholesterol mass
Alanine aminotransferase 10–26 U/L (men), 10–19 U/L (women) Liver signal that moved in the fatty liver pilot
Ferritin 30–100 ng/mL Guards against the iron-binding interaction
Blood pressure Below 120/80 mmHg Cheapest read on vascular effect, though pooled trials show no change
Flow-mediated dilation No established target; track change from the individual’s own baseline Directly measures the best-supported benefit

Cadence: Baseline panel in the week before the first dose, repeated at 12 weeks, then every 6 to 12 months on continued use. Daily capillary glucose for the first 4 weeks on glucose-lowering drugs; clotting-time rechecks at 1 and 2 weeks on warfarin.

Qualitative Assessment

  • Daytime energy and afternoon slump severity
  • Visual comfort and eye strain after long screen sessions
  • Soreness and readiness in the 24–48 hours after hard training
  • Subjective cognitive clarity and word-finding ease
  • Digestive comfort, especially in the first two weeks
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.