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Lysine
L-Lysine is an essential amino acid that doubles as a B-tier antiviral against herpes simplex virus (HSV-1 and HSV-2).
Aliases (1)
Overview
What is Lysine?
L-Lysine is an essential amino acid that doubles as a B-tier antiviral against herpes simplex virus (HSV-1 and HSV-2). Its only differentiated use case in this stack is HSV outbreak suppression — 1 g/day prophylaxis or 3 g/day during an active outbreak, taken between meals. For Dylan specifically (20yo MMA + business owner, no known HSV history, protein-heavy diet ~150-200 g/day): OPTIONAL-ADD, low priority. The diet already provides 8-12 g lysine daily, which saturates every non-antiviral use case. The single conditional scenario where this jumps to STRONG-CANDIDATE is recurrent cold sores or herpes gladiatorum (the wrestling/BJJ-endemic skin HSV — 100% relevant if Dylan trains grappling). Outside that scenario, valacyclovir 500 mg/day Rx is the higher-leverage tool. Lysine is cheap, safe (NOAEL 6 g/day; clinical use up to 17.5 g/day documented), and benign enough that the threshold for trying it is low — but the threshold for benefit is also narrow.
Peptide Interactions
Independent antiviral mechanism (interferes with HSV polymerase; topical zinc has direct lesion-healing evidence). The "lysine + zinc" pairing is the stronge…
Collagen + epithelial repair cofactor; rate-limits prolyl/lysyl hydroxylation for re-epithelialization. Pair with lysine for lesion-healing emphasis.
Functionally synergistic — you're engineering the lysine:arginine ratio. Drop nuts, chocolate, gelatin, raisins during outbreak phase.
Different mechanisms (Rx = viral DNA polymerase chain termination; lysine = arginine substrate antagonism). Stack additively. Valacyclovir is the higher-leve…
Indirect — immune-modulation supports HSV-control axis.
B-tier evidence for HSV-1 lesion treatment; pairs with oral lysine.
(citrulline malate, AAKG, supplemental arginine). Directly opposing mechanism. If you're using arginine/citrulline for the pump/NO pathway in training (an MM…
Collagen is arginine + glycine + proline heavy; a 10 g collagen peptides dose delivers ~800 mg arginine plus 700 mg glycine. During HSV outbreak phase, this …
Same logic — high arginine load.
~1 g arginine per 30 g nuts. Acceptable in maintenance phase, problematic during outbreak phase.
What to Expect
- Week 1Tolerability and dose-response.
- Week 2-4Early effect window.
- Week 4-8Peak benefit assessment.
- Week 8+Cycle decision point.
Side Effects & Safety 4
Side Effects
- 1GI upset (cramping, loose stool, mild diarrhea). Most frequent at >3 g/day or on empty stomach. Mitigation: take with small carb snack, split doses, drop to 2 g if persistent.
- 2Mild nausea. Less common; usually first-dose only.
- 3Hypercalciuria. Lysine modestly increases urinary calcium excretion (Civitelli 1992 showed *retention* at 800 mg dose; higher chronic doses may flip the sign). Clinically relevant only at multi-gram chronic doses + low calcium intake + susceptible (history of nephrolithiasis) populations.
- 4Headache. Rare; mechanism unclear (possibly NO-pathway downregulation via arginine depletion in susceptible migraineurs).
When to Stop
- Hyperammonemia in severe liver dysfunction. Lysine → glutarate → acetyl-CoA pathway generates NH3 intermediates; in cirrhosis or congenital urea-cycle disorders, this can decompensate hepatic encephalopathy. Avoid in significant liver disease.
- Aminoglycoside nephrotoxicity potentiation. Co-administration of high-dose lysine with gentamicin, tobramycin, amikacin, or related aminoglycoside antibiotics is linked to enhanced renal cortical accumulation and tubular injury in animal models. Avoid the combination; if hospitalized for IV antibiotics, hold lysine.
- Theoretical kidney strain in CKD. All amino acid loads stress nitrogen handling. In stage 3+ CKD, dose adjustment or avoidance is reasonable.
- Pregnancy. Safe at dietary/RDA intake; high-dose supplemental (>3 g) has not been studied in pregnancy and is best avoided pending data.
- Pediatric: RDA-equivalent intake is fine; supplemental high-dose is not studied. Don't supplement under-18 without indication.
- First 1-2 weeks of chronic 3 g protocol: Watch for GI tolerance. Most users adapt.
- Long-term (>6 months at >3 g/day): Monitor 24-hr urinary calcium if stone-history; otherwise unnecessary in healthy users.
- Hayamizu 2019 (PMID 30661148): NOAEL 6 g/day across 71 studies, 3357 subjects, doses 16.8 mg-17.5 g/day, durations 1-1095 days. Primary AEs are subjective GI complaints.
- Lam 2020 (PMID 33000161): Comprehensive systematic review concurs; ICAAS-derived NOAEL 6 g/day. Risk analysis for GI symptoms not statistically significant vs. placebo across pooled trials.
- Practical interpretation: Lysine at 1-3 g/day is among the safest supplements in this wiki. The honest concern threshold is "do you actually need it" rather than "is it safe."
References
Griffith RS, DeLong DC, Nelson JD. Success of L-lysine therapy in frequently recurrent herpes simplex infection. Dermatologica 1987 (PMID 3115841)
6-month placebo-controlled RCT, n=52, 1g TID; foundational evidence for the 3 g/day protocol.
View StudyThein DJ, Hurt WC. Lysine as a prophylactic agent in the treatment of recurrent herpes simplex labialis. Oral Surg Oral Med Oral Pathol 1984 (PMID 6438572)
crossover RCT establishing serum lysine >165 nmol/mL threshold.
View StudyTomblin FA Jr, Lucas KH. Lysine for management of herpes labialis. Am J Health-Syst Pharm 2001 (PMID 11225166)
review of 7 RCTs; 6 of 7 showed reduced frequency.
View StudyMailoo VJ, Rampes S. Lysine for Herpes Simplex Prophylaxis: A Review of the Evidence. Integr Med (Encinitas) 2017 (PMID 30881246)
modern review; <1 g/day ineffective, >3 g/day meaningful.
View StudyPedrazini MC, da Silva MH, Groppo FC. L-Lysine: Its antagonism with L-arginine in controlling viral infection. Narrative literature review. Br J Clin Pharmacol 2022 (PMID 35723628)
most comprehensive modern mechanistic review; introduces arginase-induction as secondary mechanism.
View StudyChang JY, Balch C, Puccio J, Oh HS. A Narrative Review of Alternative Symptomatic Treatments for Herpes Simplex Virus. Viruses 2023 (PMID 37376614)
positions 3-5 g/day lysine + propolis as strongest non-Rx HSV protocol.
View StudyCivitelli R, Villareal DT, Agnusdei D, et al. Dietary L-lysine and calcium metabolism in humans. Nutrition 1992 (PMID 1486246)
lysine increases intestinal calcium absorption + renal retention; basis for osteoporosis-prevention rationale.
View StudySmriga M, Ghosh S, Mouneimne Y, Pellett PL, Scrimshaw NS. Lysine fortification reduces anxiety and lessens stress in family members in economically weak communities in Northwest Syria. PNAS 2004 (PMID 15159538)
anxiety reduction in lysine-deficient population; not generalizable to well-fed users.
View StudyHayamizu K, Oshima I, Fukuda Z, et al. Safety assessment of L-lysine oral intake: a systematic review. Amino Acids 2019 (PMID 30661148)
NOAEL 6 g/day; primary AE is GI symptoms.
View StudyLam MPS, Lee EKW, Tong BCK, et al. Comprehensive Safety Assessment of L-Lysine Supplementation from Clinical Studies: A Systematic Review. J Nutr 2020 (PMID 33000161)
71 studies, 3357 subjects, NOAEL 6 g/day confirmed.
View StudyAnderson PC. Herpes gladiatorum: wrestling with the diagnosis. Cutis 2006
epidemiology of skin HSV in combat sports.
View StudyMinichiello JM, Fleming ST, Olson K, Malley BE, Wendell L. Herpes Gladiatorum in College-Aged Wrestler. Ann Emerg Med 2024
00280-4/fulltext) — recent case report illustrating ED presentation in collegiate wrestler.
View StudyLatest research
- reviewA Narrative Review of Alternative Symptomatic Treatments for Herpes Simplex VirusChang et al. 2023 (Viruses). Concludes 3-5 g/day lysine plus propolis offers benefit for recurrent HSV outbreaks with prophylactic potential; positions lysine as a low-risk adjunct to acyclovir-class antivirals.
- reviewL-Lysine: Its antagonism with L-arginine in controlling viral infection. Narrative literature reviewPedrazini et al. 2022 (Br J Clin Pharmacol). Most comprehensive recent mechanistic review of the arginine/lysine antagonism in viral replication; emphasizes loading-dose timing at prodrome onset and the role of induced arginase in clearing arginine.
- reviewComprehensive Safety Assessment of L-Lysine Supplementation from Clinical Studies: A Systematic ReviewLam et al. 2020 (J Nutr). 71-study, 3357-subject systematic review confirms GI symptoms as primary AE; ICAAS NOAEL 6 g/day. Supports safety of 1-3 g chronic protocols by wide margin.
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