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Melonex Ingredients

By the Melonex Team · Medically reviewed by Dr. Elena Marsh, M.D., Board-Certified in Cardiology · Updated October 2026

Quick answer

Melonex contains three named amino-acid compounds: L-Citrulline DL-Malate, L-Arginine Alpha-Ketoglutarate Dihydrate and L-Arginine HCl. All support nitric oxide and may lower blood pressure. The current Supplement Facts panel is the final authority on amounts.

Transparency matters, so every ingredient in Melonex is named below, with what it does and the cautions that come with it. Always treat the current label as the final authority on amounts, and share it with your doctor — especially given the blood-pressure considerations.

1. L-Citrulline DL-Malate

An amino acid your body converts into L-Arginine and then into nitric oxide, the molecule that helps blood vessels relax and widen for healthy blood flow. Citrulline occurs naturally in watermelon — the “melon” behind many circulation formulas — and the malate portion is linked to cellular energy metabolism. It is among the most studied amino acids for blood flow. Caution: it may lower blood pressure.

2. L-Arginine Alpha-Ketoglutarate Dihydrate

A form of L-Arginine — the direct substrate the enzyme nitric oxide synthase uses to produce nitric oxide — bound to alpha-ketoglutarate, which feeds the citric-acid (energy) cycle. It is studied in relation to blood flow, vascular function and exercise physiology. Caution: because it may lower blood pressure, it should be used with medical guidance if you take blood-pressure, nitrate or ED medication.

3. L-Arginine Hydrochloride (HCl)

A highly soluble form of L-Arginine that contributes to protein synthesis and nitric-oxide production, supporting healthy circulation. Including two arginine forms plus citrulline is intended to support nitric oxide through more than one pathway. Caution: L-Arginine may lower blood pressure and can trigger herpes (cold-sore) outbreaks in susceptible people.

A note on blood pressure and interactions

All three compounds support nitric oxide, which may lower blood pressure and widen blood vessels. If you take blood-pressure medication, nitrates or erectile-dysfunction drugs (PDE5 inhibitors such as sildenafil), combining them could drop your blood pressure too far, so medical guidance is essential. L-Arginine may also trigger herpes (cold-sore) outbreaks in susceptible people. Review the full panel with your doctor or pharmacist before use.

Support your heart & circulation the honest way

Melonex brings three researched amino acids together in one daily capsule — nutritional support for nitric oxide, healthy circulation and blood pressure, alongside your diet, movement and doctor.

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EM
Medically reviewed by Dr. Elena Marsh, M.D.
Board-Certified in Cardiology · Reviewed October 2026

Our content is written by the Melonex editorial team and reviewed for accuracy against current guidance from bodies such as the NIH Office of Dietary Supplements, the American Heart Association, NCCIH, the CDC and Mayo Clinic. It is educational and is not a substitute for personal medical advice. Our editorial policy.

Medical disclaimer: This page is educational and not medical advice. Melonex is a dietary supplement for healthy adults (18+) and is not intended to diagnose, treat, cure or prevent high blood pressure, heart disease or any disease. It is built on the amino acids L-Arginine and L-Citrulline, which support nitric oxide and may lower blood pressure and widen blood vessels; if you take blood-pressure medication, nitrates, erectile-dysfunction drugs (PDE5 inhibitors), or blood thinners, combining them could drop your blood pressure too far — show your doctor the label, and never stop or change prescribed medication. L-Arginine may also trigger herpes outbreaks in susceptible people. Persistent high blood pressure needs medical evaluation — please see a doctor. For adults only (18+).
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