L-Lysinate for Health & Longevity - Quick Reference Sheet
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L-Lysinate for Health & Longevity

Created on 07/08/2026 – Quick Reference based on Evidence Review created using AI4L / Opus 4.8 – Audit

L-Lysinate is a supplement form of an essential amino acid needed to build protein and form collagen. It matters most for people eating mainly plant-based diets. Its popular use for recurring cold sores rests on genuinely mixed evidence, with a possible mild calming effect alongside arginine. It is inexpensive and generally well tolerated. (Full Review)

Protocol

Repletion Dose
500 mg–1 g/day
Corrects low dietary intake, aligned with ~30 mg/kg/day requirement
Cold Sores
1–3 g/day
~1 g maintenance; 3 g+/day (or 1 g three times daily) during an active outbreak
Dosing Pattern
Split 2–3×/day
Short 1–2 h half-life; taking with food improves tolerance
Time to effect
Dietary Repletion
Immediate
Intake corrected at once; downstream effects gradual
Cold-Sore Prevention
Weeks–months
Assessed over consistent use
Active Cold Sore
Days
Judged over the days of the outbreak

Benefits

Contraindications
  • Inborn lysine-handling disorders (lysinuric protein intolerance, hyperlysinemia)
  • Chronic kidney disease (eGFR < 60 mL/min/1.73 m²)
  • Pregnancy and lactation
    •
Key Interactions
  • Aminoglycoside antibiotics (gentamicin, tobramycin, amikacin)
  • Calcium-containing antacids and supplements
  • L-Arginine
  • Calcium and vitamin D
    •

Risk & Side Effects

  • High: Dose-dependent gastrointestinal distress
    •
  • Medium: Renal caution with reduced kidney function
    •
  • Low: Renal tubular dysfunction at very high intakes; reduced arginine availability
    •
  • Speculative: Theoretical mTOR growth-signaling stimulation; theoretical harm in inborn lysine-handling disorders
    •

Monitoring

Marker Target Why
eGFR > 90 mL/min/1.73 m² Screens the kidneys' ability to handle the added 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 protein and amino-acid load and hydration
Serum calcium (albumin-corrected) 9.2–10.0 mg/dL Tracks the possible increase in calcium absorption from lysine

Cadence: Kidney function rechecked ~3 months after starting a sustained higher dose, then every 6–12 months

Qualitative Assessment

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