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Citrulline Malate Supplement Facts: What L-Citrulline DL-Malate Means in Melonex

Quick answer

L-citrulline DL-malate is the first name in the Melonex proprietary blend. Label order means it weighs at least 167 mg and under 500 mg per capsule, as a salt, so the citrulline itself is less. Studies of citrulline used 3 to 8 g a day. No amount is printed, and no study has tested Melonex.

Written by the Melonex label deskUpdated October 19, 2026

The first name01

What is L-citrulline DL-malate in a citrulline malate supplement?

L-citrulline DL-malate is the amino acid citrulline joined to malic acid, which makes a salt. It is the first of three names inside the Melonex blend.

Citrulline is an amino acid. The body makes some and gets some from food (Cleveland Clinic, Amino Acids). Malic acid is the other half of the salt. It adds weight but is not what the studies are about.

The idea behind such products is that the body turns citrulline into arginine. Melonex citrulline is not sold alone. It shares one 500 mg line with two arginine forms, shown on the ingredients overview.

Quick profile02

What does the label say about Melonex citrulline?

The label says L-citrulline DL-malate is part of a 500 mg proprietary blend and prints no amount.

Federal rules let a company show one blend weight and leave out the parts (21 CFR 101.36, Supplement Facts). Melonex does that.

How the Melonex label lists L-citrulline DL-malate, set beside the research. Sources: (Barkhidarian 2019, citrulline and BP) (Mirenayat 2018, citrulline and BP) (Luo 2025, citrulline/watermelon and BP) (Cleveland Clinic, L-citrulline) (Wang 2026, citrulline malate and exercise)
Name on the label	L- Citrulline dl - Malate
What it is	Amino acid citrulline joined to malic acid (a salt)
Place in the blend list	1 of 3, most to least by weight
Amount per capsule	not printed; the label order puts it at 167 mg or more of the 500 mg blend
Amount used in research	3 to 8 g (3,000 to 8,000 mg) a day of citrulline for 1 to 16 weeks
Strength of evidence	Small average systolic drops in pooled trials, no effect in one analysis; small, low-certainty exercise benefit
Marketed or traditional use	Sold for exercise and blood flow
Main caution	Possible bloating, cramping, diarrhea, sweating (Cleveland Clinic). That page lists no drug interactions; ask your pharmacist anyway.

The typed-out panel is on the supplement facts page.

Label math03

What amount of citrulline malate is in one Melonex capsule?

Nobody outside the company can say, but the order of the names sets a floor. L-citrulline DL-malate is at least 167 mg and under 500 mg per capsule.

Worked example: federal rules list the parts of a blend from the heaviest to the lightest, and the blend number is their combined weight (21 CFR 101.36, Supplement Facts). The blend is 500 mg and has three names. If all three weighed the same, each would be about 167 mg. The first name cannot weigh less than the others, so it is at least 167 mg.

The top end is just under 500 mg, because the other two names must weigh something. That is a wide range.

500 mgone Proprietary Blend per capsule, amounts of the three names not printed

Proprietary Blend 500 mg

L-Citrulline DL-Malate167 to 500 mg
L-Arginine alpha-ketoglutarateup to 250 mg
L-Arginine HClup to 167 mg

Bars show the widest range the label order allows for each name (21 CFR 101.36, Supplement Facts). The real split is not printed.

These are weights of the salt. The malate part is not citrulline, so the citrulline itself weighs less. They are limits from label order, not measurements.

Amounts vs research04

Is the citrulline in Melonex close to the amounts studied?

No. The studies of citrulline used grams a day, and the whole Melonex blend is half a gram per capsule.

Cleveland Clinic sums up studies that gave 3 to 8 g a day for 1 to 16 weeks (Cleveland Clinic, L-citrulline). That is 3,000 to 8,000 mg.

Take the most generous case: two capsules a day, with citrulline malate filling nearly the whole blend. That is under 1,000 mg of salt, a third of the low end of the studied range. At one capsule it is a sixth. At the 167 mg floor it is about one eighteenth.

That is arithmetic, not a verdict. No study tested Melonex.

L-Citrulline DL-Malate
At most 16.7% of the low study amount

Most one Melonex capsule can hold (label order)500 mg

3 to 8 g a day of citrulline, 1 to 16 weeks (Cleveland Clinic summary)3,000-8,000 mg

The label prints no amount for this name; 500 mg is the ceiling its place in the list allows. (Cleveland Clinic, L-citrulline)
L-Arginine alpha-ketoglutarate
At most 6.2% of the low study amount

Most one Melonex capsule can hold (label order)250 mg

4 g per dose, 12 g a day, in a 35-man sports trial4,000-12,000 mg

The label prints no amount for this name; 250 mg is the ceiling its place in the list allows. (Campbell 2006, L-arginine AKG trial)

Red bars: the most one daily capsule can hold of that name, worked out from the label order (the real amount is not printed). Green bars: the amount used in the study we found, set to full width. A studied dose says what was tested, not what works for you, and no study tested Melonex.

Evidence05

What do studies say about citrulline malate supplements?

The research is mixed. It covers citrulline on its own, at grams a day, and not the Melonex blend.

Pooled analyses of citrulline, all at study doses of grams a day
Source	What it pooled	What it found
Barkhidarian 2019 (Barkhidarian 2019, citrulline and BP)	8 small trials	Systolic fell about 4.10 mm Hg on average. The diastolic change was not statistically significant overall.
Mirenayat 2018 (Mirenayat 2018, citrulline and BP)	5 interventions	No significant change in blood pressure.
Luo 2025 (Luo 2025, citrulline/watermelon and BP)	15 trials, 415 people	Systolic about -4.02 and diastolic about -2.54 mm Hg. Groups given citrulline with arginine showed larger changes.
Wang 2026, exercise (Wang 2026, citrulline malate and exercise)	30 trials, 644 people	A small gain in performance, with wide ranges and low to very low certainty.

The gain was small, and the authors say the best dose and timing are not established (Wang 2026, citrulline malate and exercise).

The Luo analysis saw larger changes where citrulline and arginine were given together (Luo 2025, citrulline/watermelon and BP). That fits putting both in one capsule. It does not show a 500 mg blend does the same, because those trials gave far more.

NCCIH says no dietary supplement has been shown to work like blood pressure drugs (NCCIH, Hypertension).

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Safety06

What are the side effects and cautions of citrulline malate?

Cleveland Clinic lists bloating, cramping, diarrhea and sweating as possible side effects of citrulline (Cleveland Clinic, L-citrulline). It advises asking a provider first.

That page lists no drug interactions. A missing list is not proof of safety, so ask your pharmacist. The capsule also holds two arginine forms with their own cautions.

After a heart attack, Mayo Clinic, MSK and Cleveland Clinic advise against arginine (Mayo Clinic, L-arginine) (MSK, Arginine) (Cleveland Clinic, L-arginine). A capsule that contains arginine falls under that advice.
Never stop or change a prescribed medicine for a supplement (AHA, Managing BP Medications).
Chest pain, trouble breathing, fainting, or sudden face, arm or speech changes mean call 911 (AHA, Warning Signs of a Heart Attack) (CDC, Signs and Symptoms of Stroke).

The full list is on the side effects page.

If you still want to try it07

Is Melonex a good way to get citrulline malate?

Only if you want a simple one-capsule routine and accept a hidden citrulline amount. A studied amount of citrulline is not something this label can show.

Fair points

A 60-day money-back guarantee is described; confirm the live policy at checkout (Melonex sales page).

Weak points

The amount is not printed.

Three Melonex bottles with ivory and oxblood labels — Brand render of three bottles; it shows the product, not a result.

Three bottles are $207, about $1.15 a day. See the pricing page.

Keep reading08

Where do I read about the other two Melonex ingredients?

The other two names are forms of arginine, each with its own label ceiling. The proprietary blend page shows how the three share 500 mg.

FAQ09

Citrulline malate in Melonex: questions

What does DL-malate mean on the Melonex label?

DL-malate is the malic acid part of the salt. D and L name two mirror-image forms of malic acid. It is not the amino acid, so the label weight overstates the citrulline.

Is citrulline malate the same as L-citrulline?

No. L-citrulline is the amino acid alone. Citrulline malate is that amino acid bonded to malic acid. A gram of the salt holds less than a gram of citrulline, so doses do not compare one to one.

How many mg of citrulline malate are in Melonex?

The label does not say. Label order means the first name weighs at least 167 mg and under 500 mg per capsule. That figure is the salt, and the citrulline portion is lower than that.

How much citrulline do studies use per day?

Cleveland Clinic summarizes studies using 3 to 8 g of citrulline a day for 1 to 16 weeks. One Melonex capsule holds a 500 mg blend of three names, far below that.

Does citrulline malate help workouts?

Maybe a little. A 2026 pooling of 30 trials found a small gain in performance, but certainty was low to very low. Melonex is not sold or studied as a workout product.

Can I take Melonex citrulline with blood pressure medicine?

Ask your doctor or pharmacist first. Cleveland Clinic lists no citrulline interactions, but the capsule also holds arginine, which Mayo Clinic, MSK and Cleveland Clinic say can add to blood pressure medicines.

Who wrote this10

Written and reviewed by

Written byThe Melonex label deskMelonexcardio, Official U.S. Melonex shop

Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.

Medically reviewed byDr. Maria Menucci, MD, PhysicianRole: Medical reviewerReview date: October 19, 2026

Last updated October 19, 2026. See our editorial standards and how we check reviews. This website is the information site for the Official U.S. Melonex shop. It is not the manufacturer or the distributor named on the label. We make money when you buy through our order links.

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