Ingredients
Melonex Ingredients: The Three Names in the 500 mg Blend and What the Research Says
Melonex has three named ingredients, all in one 500 mg Proprietary Blend per capsule: L-citrulline dl-malate, L-arginine alpha-ketoglutarate and L-arginine HCl. The label lists them from most to least by weight but prints no single amount. Three other ingredients make the capsule: a cellulose shell, microcrystalline cellulose and magnesium stearate.
Written by the Melonex label deskUpdated
What are the Melonex ingredients?
The Melonex ingredients are L-citrulline dl-malate, L-arginine alpha-ketoglutarate dihydrate and L-arginine HCl, plus a capsule shell and two fillers. Together the three named amino acid forms weigh 500 mg per capsule.
The Supplement Facts panel lists them in this order. The brand's sales site names the same three and adds the phrases "high-purity, naturally derived ingredients" and "100% natural", with no data behind either 1. The label itself says only "Natural Formula*".
- 1L- Citrulline dl - Malate167 mg or more of the 500 mg blend
- 2L-Arginine (Alpha-Ketoglutarate dihydrate)under 250 mg of the 500 mg blend
- 3L - Arginine HCLunder 167 mg of the 500 mg blend
From the Supplement Facts panel, in label order. The label prints 500 mg for the whole Proprietary Blend and no amount for any name, so the limits shown come from the order alone. Other ingredients (hydroxypropyl methylcellulose capsule, microcrystalline cellulose, magnesium stearate) are not part of the blend.
The checkout page we read prints no ingredient list and no serving size. This site follows the bottle label, which does.
What does each ingredient do?
Each ingredient is an amino acid joined to a partner salt. Arginine is the one the body uses to make nitric oxide; citrulline is a precursor the body turns into arginine.
Tap or hover a card to see the limits the label order sets and what researchers used. Full pages follow for each.
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167to 500 mglabel order, of 500 mg01
L-Citrulline DL-Malate
#1 in the blend list: 167 mg or more
Amino acid citrulline joined to malic acid (a salt)
Evidence: Small average systolic drops in pooled trials, no effect in one analysis; small, low-certainty exercise benefitPer capsulenot printed; the label order puts it at 167 mg or more of the 500 mg blend
Studied at3 to 8 g (3,000 to 8,000 mg) a day of citrulline for 1 to 16 weeks
Watch forPossible bloating, cramping, diarrhea, sweating (Cleveland Clinic). That page lists no drug interactions; ask your pharmacist anyway.
Full profile -
up to 250mglabel order, of 500 mg02
L-Arginine AKG
#2 in the blend list: 250 mg at most
Amino acid arginine joined to alpha-ketoglutarate (a salt)
Evidence: Little human evidence; one review says clinical evidence is lackingPer capsulenot printed; the label order caps it at 250 mg of the 500 mg blend
Studied at4 g per dose, 12 g a day, in one sports trial of 35 men
Watch forNo authoritative safety page for alpha-ketoglutarate was found. Arginine cautions apply: blood-pressure medicines, nitrates, recent heart attack.
Full profile -
up to 167mglabel order, of 500 mg03
L-Arginine HCl
#3 in the blend list: 167 mg at most
Amino acid arginine as its hydrochloride salt
Evidence: Small average drops in pooled trials of arginine alone; Mayo says it might help, MSK calls the evidence mixed and limitedPer capsulenot printed; the label order caps it at 167 mg of the 500 mg blend
Studied atPooled trials of L-arginine alone mostly used grams a day; no further change above 9 g a day
Watch forNot recommended after a recent heart attack (Mayo, MSK, Cleveland Clinic). Can add to blood-pressure medicines; Mayo also names nitrates, sildenafil and potassium-sparing diuretics.
Full profile
How do the three ingredients compare?
They share one family, but differ in the partner salt, the place in the list and the evidence behind them.
| Name on the label | Place | Amount printed | What the label order allows (per capsule) | Amount used in research | Evidence |
|---|---|---|---|---|---|
| L- Citrulline dl - Malate | 1 of 9 | Not printed | 167 mg or more, under 500 mg | 3 to 8 g (3,000 to 8,000 mg) a day of citrulline for 1 to 16 weeks 2 3 4 5 6 | Small average systolic drops in pooled trials, no effect in one analysis; small, low-certainty exercise benefit |
| L-Arginine (Alpha-Ketoglutarate dihydrate) | 2 of 9 | Not printed | under 250 mg | 4 g per dose, 12 g a day, in one sports trial of 35 men 7 8 9 10 11 12 | Little human evidence; one review says clinical evidence is lacking |
| L - Arginine HCL | 3 of 9 | Not printed | under 167 mg | Pooled trials of L-arginine alone mostly used grams a day; no further change above 9 g a day 10 11 12 13 14 | Small average drops in pooled trials of arginine alone; Mayo says it might help, MSK calls the evidence mixed and limited |
The place in the list sets the ceiling. With three names in 500 mg, the first is at least 167 mg, the second at most 250 mg and the third at most 167 mg 15. These are rules of arithmetic, not amounts we measured.
What are the other ingredients in Melonex?
The other ingredients are hydroxypropyl methylcellulose, microcrystalline cellulose and magnesium stearate. They make the capsule and help the powder flow; they are not part of the blend.
Hydroxypropyl methylcellulose (HPMC) is a plant-cellulose capsule shell. Microcrystalline cellulose is a bulking agent made from plant fiber. Magnesium stearate is a flow aid. The brand's own plate for the capsule lists the same three and marks them "not in the blend".
The label prints no allergen statement. None of the listed ingredients is a milk, egg, wheat, soy, nut, fish or shellfish product, but ask the order desk at +1 (855) 889-3137 if you have a serious allergy. Do not use the capsule if the safety seal is damaged or missing.
Melonex: from $49 a bottle60 capsules · 2, 3 or 6 bottles · free US shipping on 3 and 6 · 60-day money-back guarantee
See packsIs Melonex a natural formula?
The label says "Natural Formula*", and the sales site says "100% natural". Neither phrase has a legal meaning for supplements, and neither tells you the product is safe.
NIH puts it plainly: the term natural does not always mean safe 16. The three names here are amino acids that food makers can also produce in a lab, joined to salts such as malate and hydrochloride. They are real compounds that occur in the body, but the form in a capsule is made, not picked.
What do the Heart Support and Circulation Support lines mean?
They are the brand's own descriptions of the product, each followed by a star that leads to the FDA statement. They are not test results.
The FDA allows a structure-style claim only with the line that the statement has not been evaluated, and it may not say a product treats or prevents a disease 17. Read the claims next to the evidence on the claims versus evidence page.
FAQ01
Melonex questions people ask
What are the ingredients in Melonex?
Melonex lists L-citrulline dl-malate, L-arginine alpha-ketoglutarate dihydrate and L-arginine HCL in one 500 mg Proprietary Blend. Other ingredients are hydroxypropyl methylcellulose, microcrystalline cellulose and magnesium stearate.
How much L-arginine is in Melonex?
The label does not say. Two of the three names are forms of arginine, and together they are at most two thirds of the 500 mg blend, going by the label order. Nothing more exact is printed.
Does Melonex contain caffeine, stimulants or herbs?
No. The label lists no caffeine, no herb and no stimulant. The three named amino acid forms and three capsule materials are the full list.
Does Melonex contain a hidden drug?
Nothing printed on the label suggests one, and we found no FDA warning about this product. FDA does not test supplements before sale, so if a capsule ever caused an unexpected reaction, report it through MedWatch.
Is Melonex vegan or gluten free?
The label makes no vegan or gluten-free statement. The capsule shell is a plant cellulose, and none of the listed ingredients is wheat, but ask the order desk for a written answer if it matters to you.
Why does the label list a Proprietary Blend?
A blend lets a brand print one total weight instead of three amounts. The rule is that names must be listed from most to least by weight, which is why the list order tells you something.
Who wrote this02
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site for a USA Authorized Melonex Retailer. It is not the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
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