L-Citrulline Dosage Guide

## Overdose Risk L-Citrulline has an extremely wide safety margin. No cases of clinically significant overdose have been reported in the medical literature. In pharmacokinetic studies, healthy participants tolerated cumulative doses of up to 15 grams over 8 hours without adverse effects beyond mild gastrointestinal discomfort. ## High-Dose Effects At doses exceeding 10 grams in a single bolus, the primary concerns are: - **Gastrointestinal distress** -- nausea, cramping, diarrhea, and bloating due to osmotic effects and excess nitric oxide in the intestinal lining - **Hypotension** -- excessive nitric oxide-mediated vasodilation could theoretically produce symptomatic low blood pressure (dizziness, lightheadedness, fainting), particularly in individuals already taking antihypertensive medications - **Arginine excess** -- very high doses could theoretically produce excessive arginine and downstream metabolites, though no clinical harm from this mechanism has been documented ## Practical Ceiling The practical upper limit for a single dose is approximately 10 grams. Beyond this amount, gastrointestinal tolerance decreases and the dose-response curve for beneficial effects plateaus. There is no meaningful pharmacological reason to exceed 10 grams in a single administration. ## Emergency Considerations In the extremely unlikely event of massive ingestion (e.g., accidental consumption of an entire container), treatment is supportive. Monitor blood pressure and provide IV fluids if hypotension occurs. No antidote is needed or exists. The prognosis is excellent -- citrulline is metabolized through normal physiological pathways and does not accumulate in tissues.