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

Created on 07/22/2026 – Quick Reference based on Evidence Review created using AI4L / Opus 4.8 – Audit

Lysine is an essential amino acid most people get enough of from food. Its best-studied supplement use — reducing cold sore outbreaks — shows divided evidence, with possible benefit at higher daily amounts. Weaker signals exist for stress (paired with arginine) and calcium absorption. Cheap, widely available, and well tolerated; digestive upset is the main complaint, with extra care for kidney problems. (Full Review)

Protocol

Herpes Prophylaxis
1–3 g/day
1 g, one to three times daily; empty stomach, away from arginine-rich meals
Acute Outbreak
Up to 3 g/day
Divided doses at first sign of a lesion, tapering as it resolves
Anxiety / Stress
~2.6 g/day + arginine
L-lysine ~2.6 g/day paired with L-arginine ~2.6 g/day
Time to effect
Herpes Prophylaxis
Weeks–months
Judged by tracking outbreak frequency over consistent use
Anxiety / Stress
Within days
Effects, if present, appear within days
Acute Outbreak
Within days
Less reliable than prevention

Benefits

Contraindications
  • Lysinuric protein intolerance and cationic amino acid transport disorders
  • Severe chronic kidney disease (eGFR <30, Stage 4–5) unless supervised
  • Advanced gallbladder disease
  • Pregnancy and lactation
    •
Key Interactions
  • L-arginine and arginine-rich supplements
  • Calcium supplements and vitamin D therapies (calcium carbonate, calcium citrate, cholecalciferol)
  • Aminoglycoside and other nephrotoxic drugs (gentamicin, tobramycin, neomycin)
  • Over-the-counter calcium-containing antacids
  • Low-arginine diet (potentiates antiviral effect)
    •

Risk & Side Effects

  • High:
  • Medium: Gastrointestinal disturbance
    •
  • Low: Renal impairment and caution in kidney disease; interference with arginine-dependent functions
    •
  • Speculative: Gallstone and cholesterol concerns; adverse glycation interactions
    •

Monitoring

Marker Target Why
Estimated glomerular filtration rate (eGFR) >90 mL/min/1.73m² Confirms kidneys can safely handle an amino-acid load
Serum creatinine 0.6–1.0 mg/dL Direct marker of kidney filtration
Blood urea nitrogen (BUN) 10–16 mg/dL Reflects nitrogen/protein handling and hydration
Serum calcium 9.0–10.0 mg/dL Lysine enhances calcium absorption; guards against excess
Plasma lysine (amino-acid panel) Within lab reference; antiviral effect linked to >165 nmol/mL Confirms absorption and adequacy
Lipoprotein(a) <30 mg/dL (or <75 nmol/L) Relevant only if lysine is used for the cardiovascular (Pauling) rationale

Cadence: Kidney function every 12 months (every 3–6 months in chronic kidney disease or sustained high doses); review symptom diary at ~1 month, 3 months, then periodically

Qualitative Assessment

  • Frequency, severity, and healing time of cold sore or canker sore outbreaks
  • Perceived stress and anxiety levels
  • Digestive tolerance (absence of cramping or loose stools)
  • General energy and sense of wellbeing
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.