Quick answer: L-Citrulline is an amino acid closely tied to nitric oxide production, which helps maintain healthy blood flow already within normal ranges — one of the better-researched ingredients for circulation and physical performance support.
What is L-Citrulline?
L-Citrulline is an amino acid the body converts into L-arginine and then nitric oxide, a molecule that relaxes and widens blood vessels for healthier blood flow.
What does the research show?
L-Citrulline's role in nitric oxide production is summarised in research indexed on PubMed, generally associated with sustained rather than spiked blood flow support due to its gradual conversion process.
Its role in HorseFil
L-Citrulline is one of six named ingredients in HorseFil's formula. See the full ingredients breakdown.
⚠ Know before you start
Before your first gummy: because L-Citrulline supports the nitric oxide pathway, do not take HorseFil without physician guidance if you take nitrate medications, PDE5 inhibitors, or blood pressure medications.