Description
Citrulline is a non-essential amino acid naturally present in watermelon, squash, and cucumbers, as well as synthesized by the body. In the kidneys, it converts into arginine, a nitric oxide precursor that regulates vascular tone and circulation. Citrulline also interacts with metabolic pathways that support muscle recovery and endurance. Additionally, it aids in ammonia clearance, helping reduce exercise-induced fatigue. As a key factor in cardiovascular and muscular function, citrulline plays a vital role in metabolic balance.
Functions in the Body
Category
Deficiency Symptoms
Members unlock a concise, item-specific overview of what low levels (or low functional availability) may be associated with, written in neutral, non-diagnostic terms and limited to commonly referenced deficiency-pattern symptoms where applicable
Synergists & Antagonists
Members unlock practical pairing and separation notes that cover both supportive combinations and common blockers (supplements, fibers, binders, and absorption modifiers), plus clear “avoid/space” guidance where interactions are plausible
Citrulline
Warnings
Caution is advised during pregnancy and breastfeeding, as the safety of citrulline supplementation has not been well established for these groups.
Food Sources
Natural food sources of citrulline include cucumbers, pumpkins, watermelon, cantaloupe, and squash.
Time Frame
Members unlock simple timing guidance (with meals vs empty stomach, morning vs evening where it matters), keeping it consistent and practical without over-prescribing exact schedules
Disclaimer
Information on this page is for general educational purposes and is not medical advice. Nutrients and bioactive compounds can interact with medications and may cause adverse effects; consult a qualified clinician before use if on medication, pregnant/breastfeeding, under 18, or managing a medical condition. Stop use and seek medical advice if concerning symptoms occur.