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Melonex Circulation Support: The Nitric Oxide Idea Behind the Label
Melonex circulation support is a label claim, not a tested result. The capsules hold amino acids that the body can turn into nitric oxide, a molecule that relaxes blood vessel muscle. No trial of Melonex exists, and one capsule holds far less than the studied doses.
Written by the Melonex label deskUpdated · 4 min read
What does Melonex circulation support mean?
Melonex circulation support is one of three icon claims on the front of the bottle, printed as "Circulation Support*". It is a structure/function claim, and the asterisk points to the FDA statement that it has not been evaluated (FDA, structure/function claims).
So the words describe an idea, not a tested result. The idea rests on the three amino acid forms in the blend.
How does the nitric oxide idea work?
The nitric oxide idea says arginine is the raw material for nitric oxide, a molecule that relaxes vessel muscle (Cziraki 2020, arginine-NO pathway). The body also converts citrulline into arginine, and in one dosing study citrulline raised blood arginine more than arginine did (Schwedhelm 2008, citrulline kinetics).
Citrulline
Line 1 of the blend.
Arginine
Made from citrulline, plus lines 2 and 3.
Nitric oxide
Made from arginine by enzymes.
Relaxed vessels
The step the label calls circulation support.
Does one capsule match the doses that were studied?
No, one Melonex capsule holds far less than trials used. Trials gave 3 to 9 g of citrulline or 4 to 24 g of arginine a day (Barkhidarian 2019, citrulline meta-analysis) (Dong 2011, arginine meta-analysis), while two capsules give 1 g of blend.
| Label line | Share of 500 mg |
|---|---|
| 1. Citrulline malate | About 167 to 500 mg |
| 2. Arginine AKG | At most 250 mg |
| 3. Arginine HCl | At most 167 mg |
The dose check shows the math step by step.
Melonex: from $49 a bottle60 capsules · 2, 3 or 6 bottles · free US shipping on 3 or 6 · 60-day guarantee
See packsWho should ask a doctor first?
Anyone on blood pressure medicine, a nitrate or sildenafil should ask a doctor first, because arginine may push pressure too low (Mayo Clinic, L-arginine). Arginine is also not recommended after a recent heart attack (Mayo Clinic, L-arginine).
Never change a prescription because of a supplement.
The interaction guide lists common pairings.
What does a bottle cost?
The two larger packs, from the sales page:
Free US shipping3 bottles · $207$69 a bottle · 180 days at 1 capsule a day · free US shippingChoose 3 bottles
Lowest per bottle6 bottles · $294$49 a bottle · 360 days at 1 capsule a day · free US shippingChoose 6 bottlesSales-page prices, October 18, 2026 (Melonex sales page). A 2-bottle pack is also sold ($158 plus $9.99 shipping). See every pack on the pricing page.
FDA disclaimer. These statements have not been evaluated by the Food and Drug Administration. Melonex is not intended to diagnose, treat, cure, or prevent any disease. Keep taking prescribed medicine, and ask your doctor before starting any supplement.
FAQ01
Melonex questions people ask
Is circulation support the same as lower blood pressure?
No. It is a structure/function claim FDA has not evaluated. Trials showed small drops only at gram doses, not at the 0.5 to 1 g a day in Melonex (Dong 2011, arginine meta-analysis).
Does the circulation claim come from a Melonex study?
No study of Melonex has been published. The claim leans on research into arginine and citrulline as separate ingredients.
Which amino acid in Melonex makes nitric oxide?
Arginine does, through nitric oxide synthase enzymes (Cziraki 2020, arginine-NO pathway). Citrulline is the body's source of extra arginine.
Who wrote this02
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, AHA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by a USA authorized Melonex retailer, not by the manufacturer or the distributor. We earn money when you buy through our order links.
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