Oral L-lysinate supplies the same L-lysine in the blood as food. Extra amounts are not a broad longevity therapy for people who already eat enough high-quality protein. Blood pressure and infections improved when diet lysine was low. Cold-sore prevention is popular but contested. Gut upset is the main complaint, with a tentative upper limit near six grams extra per day. (Full Review)

Protocol

Common supplemental range

1–3 g/day L-lysine

Herpes protocols sometimes 3 g/day; community trials 1 g/day; under 1 g/day read as ineffective for herpes

Timing

Split doses with meals

Some herpes protocols use between-meal dosing to favor a high lysine-to-arginine ratio

Baseline diet

~45 mg lysine/g protein

If habitual intake already exceeds this, extra L-lysinate is a pharmacologic experiment, not nutrient replacement

Time to effect

Lower blood pressure when dietary lysine is low

~16 weeks

1 g/day for 112 days when dietary lysine is low

Fewer infectious illnesses when dietary lysine is low

~16 weeks

1 g/day in lysine-short households

Fewer herpes simplex recurrences

Months

Assessed over months, not days; acute outbreak shortening is not well supported

Benefits

Medium: Lower blood pressure when dietary lysine is low; fewer infectious illnesses when dietary lysine is low

Low: Fewer herpes simplex recurrences; greater intestinal calcium absorption; lower anxiety under lysine-inadequate or combined-amino-acid protocols

Speculative: Collagen quality, wound repair, and skin structure; less protein glycation; carnitine synthesis and fat oxidation

Contraindications

Lysinuric protein intolerance (SLC7A7-related)

Hyperlysinemia or hyperlysinuria

Glutaric acidemia type I

Advanced chronic kidney disease (eGFR <30 mL/min/1.73 m², roughly Kidney Disease: Improving Global Outcomes stage 4–5) unless a clinician is already managing amino-acid intake

Decompensated hepatic failure (Child-Pugh Class C)

Known lysine hypersensitivity (rare)

Key Interactions

Calcium salts (calcium carbonate, calcium citrate)

Aminoglycoside antibiotics (gentamicin, tobramycin, amikacin)

L-arginine and high-arginine supplements (L-arginine, citrulline, some nitric-oxide boosters)

Other cationic amino acids (ornithine, high-dose histidine)

Oral calcium-channel blockers (verapamil, diltiazem) and anticholinergics (diphenhydramine, oxybutynin) at multi-gram lysine boluses

Risk & Side Effects

Medium: Gastrointestinal symptoms and delayed gastric emptying

Low: Fanconi syndrome and tubulointerstitial nephritis after prolonged high intake

Speculative: Reduced arginine-dependent nitric oxide signaling; gallbladder disease and calcium co-load

Monitoring

Marker	Target	Why
eGFR (estimated glomerular filtration rate)	≥90 mL/min/1.73 m²; investigate a fall from personal baseline	Detects kidney-filter loss relevant to the Fanconi case
Serum creatinine	Stay near personal baseline (often ~0.6–1.1 mg/dL)	Proximal-tubule and filter injury
BUN	Often ~10–18 mg/dL in functional practice	Amino-acid nitrogen load
Serum calcium	~9.0–10.0 mg/dL	Lysine can raise calcium absorption
Serum phosphate	No established lysine-specific target; track personal baseline (conventional ~2.5–4.5 mg/dL) and watch a fall	Fanconi pattern includes phosphate wasting
Plasma lysine (optional)	Typical fasting ~150–250 µmol/L	Fewer lesions above 165 µmol/L; not a reliable intake marker
Blood pressure	Individual target; trial hypertensives started ≥140 mmHg systolic	Endpoint in the Ghana lysine trial

Cadence: Baseline metabolic panel and blood pressure before a multi-month protocol; repeat the metabolic panel at 4–8 weeks after reaching a steady dose, then every 6–12 months if use continues, sooner if nausea, polyuria (large urine volume), or bone pain appears

Qualitative Assessment

Cold-sore or genital-herpes recurrence count, duration, and severity
Nausea, bloating, or change in stool after dose increases
Energy and training recovery if the goal is protein quality on a plant-heavy diet
Stress reactivity if that was the reason for use

L-Lysinate for Health & Longevity

Protocol

Benefits

Risk & Side Effects

Monitoring

Qualitative Assessment