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Condition

Pulmonary Hypertension

Pulmonary hypertension is high blood pressure in the arteries of the lungs, which makes the right side of the heart work harder and can lead to right heart failure. Iron has the strongest evidence among supplements, moderate, with symptoms improving when low iron was corrected, while small studies of inhaled vasoactive intestinal peptide found lower lung artery pressure and better cardiac output. Most other supplements, such as coenzyme Q10, have only limited evidence.

Sources: PMID 18978135

Supplements studied
1
Medicines and peptides
1
Graded outcomes
2
Trials
1
People studied
25

Evidence by supplement

  • Strong
  • Moderate
  • Limited
  • Very limited

1 supplement

Citrulline: outcomes studied for Pulmonary Hypertension
GradeOutcomeEffectSizeStudiesPeopleStudies list
Blood Pressure

Small Improvement

Improves (the measure goes down)Small effect7 studies25 people
Exercise CapacityImproves (the measure goes up)25 people

Prescription medicines and peptides studied, for context

These are not supplements. Most need a prescription, and some are research compounds with no approved use. They are listed so the supplement evidence above can be read against them.

1 medicine or peptide

Vasoactive Intestinal Peptide (VIP/Aviptadil)

  • Pulmonary Hemodynamics: improves
Vasoactive Intestinal Peptide (VIP/Aviptadil): outcomes studied for Pulmonary Hypertension
GradeOutcomeEffectSizeStudiesPeopleStudies list
Pulmonary Hemodynamics

Petkov 2003: Inhaled VIP reduced pulmonary artery pressure, improved cardiac output and mixed venous oxygen in PAH patients. VIP deficiency found in PAH patient serum and lung tissue. Small clinical studies show promise.

Improves (the measure goes up)Moderate effect4 studies

Key findings

  • Blood PressureCitrullineImproves (the measure goes down)

The Pulmonary Hypertension Supportive Care protocol

2 primary supplements · 7 supporting supplements

  • Coenzyme Q10100–300 mg daily
  • IronIV iron if deficient (oral often inadequate); dosing per physician

See the full protocol

Shop the evidence-backed picks

Support alongside medical care. These supplements are not a treatment for Pulmonary Hypertension. If you are being treated for it, talk to your clinician before adding one: supplements can interact with medicines.

Fullscript collectionHeart and circulation: evidence-graded picksOpen on Fullscript

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Studies cited

11 studies from PubMed

  1. A Clinical Approach for the Use of VIP Axis in Inflammatory and Autoimmune DiseasesInt J Mol Sci, 2019 · PMID 31861827
  2. Immunomodulation of innate immune responses by vasoactive intestinal peptide (VIP): its therapeutic potential in inflammatory diseaseClin Immunol, 2009 · PMID 19604262
  3. Inhalation of vasoactive intestinal peptide in pulmonary hypertensionEur Respir J, 2008 · PMID 18978135
  4. Vasoactive intestinal peptide modulates proinflammatory mediator synthesis in osteoarthritic and rheumatoid synovial cellsRheumatology (Oxford), 2004 · PMID 14657510
  5. Nitric oxide precursors and congenital heart surgery: a randomized controlled trial of oral citrullineJ Thorac Cardiovasc Surg · PMID 16798303
  6. Oral l-citrulline malate in patients with idiopathic pulmonary arterial hypertension and Eisenmenger Syndrome: a clinical trialJ Cardiol · PMID 24525046
  7. Acute Effects of Citrulline Malate Supplementation on Nocturnal Blood Pressure Dipping After Exercise in Hypertensive Patients: A Randomized, Placebo-Controlled Trial.J Diet Suppl · PMID 39385595
  8. Inter-Individual Responses to Citrulline Malate Oral Supplementation on Post-Exercise Hypotension in Hypertensives: A 24-Hour AnalysisArq Bras Cardiol · PMID 31291417
  9. Effect of L-arginine or L-citrulline oral supplementation on blood pressure and right ventricular function in heart failure patients with preserved ejection fractionCardiol J · PMID 21154265
  10. Improvement of ventricular function in systolic heart failure patients with oral L-citrulline supplementationCardiol J · PMID 23224924
  11. Effect of oral L-citrulline on brachial and aortic blood pressure defined by resting status: evidence from randomized controlled trialsNutr Metab · PMID 31889969