Starter
2 bottles120 capsules · 120 days
$158total
$79 a bottle
- Lasts
- 120 days at 1 capsule a day
- Per day
- about $1.32
$9.99 shipping on this kit
- 120 days at 1 capsule a day (60 at 2)
- $9.99 shipping on this kit
- 60-day money-back guarantee
Capsules · 60 per bottle
Official website · USA Authorized Melonex Retailer
Melonex Capsules Official Website: L-Citrulline and L-Arginine for Heart and Circulation Support
Melonex is a dietary supplement sold as capsules, 60 to a bottle, with Heart Support* and Circulation Support* printed on the label. You take one capsule a day with 8 oz of water; the label allows up to two. Each capsule holds one 500 mg blend of L-citrulline malate and two forms of L-arginine, with no amounts printed. No study has tested Melonex itself.
Quick facts
- Format
- Capsules, 60 per bottle
- Key ingredients
- L-citrulline malate and two L-arginine forms
- Best for
- Adults 18 and over, after a talk with a doctor
- Formula
- One 500 mg blend, amounts not printed
- Guarantee
- 60-day money back (30 days of use asked)
- Supply
- 60 days at 1 capsule a day
- The whole label, typed out
- The three names and their limits
- Medicine and heart-attack flags
- Prices and the 60-day guarantee
- 60capsules in each bottle
- 500 mgone blend per capsule, split not printed
- 60-daymoney-back guarantee
- Secure checkout on the sales site
- 60-day money-back guarantee
- Ships from the U.S.
Written by the Melonex label desk · Updated
Heart Support*printed on the label front
Made in the USAwith globally sourced ingredients
3 amino acid formsone 500 mg blend, amounts not printed
Free US shipping · 3 and 6 bottle kits
Home reading coach
4 steps before a home reading 1
Sit quietly for 5 minutes. Sit and rest for at least five minutes before you measure. Do not smoke, drink caffeine or exercise in the 30 minutes before.
Back supported, feet flat. Sit upright with your back supported, like a dining chair rather than a sofa, both feet flat on the floor and your legs uncrossed.
Cuff at heart level. Rest your arm on a flat surface and place the middle of the cuff on your upper arm at heart level.
No talking, then read. Stay quiet and keep your phone down during the rest and the reading. Take two readings one minute apart and write both down.
Educational illustration only. It is not a measurement and not a result of Melonex.
FDA-registered facility
Made in the USA
60-day money back
GMP badge
Non-GMO badge
Seller badges, not certificates. None names a certifier. Registering a facility with the FDA is not approval 2. What each badge means
The short version01
What exactly is Melonex?
Melonex is a dietary supplement sold as capsules in a white 60-count bottle with a cream label. One serving is one capsule, so one bottle holds 60 servings.
The Supplement Facts panel has a single line: Proprietary Blend, 500 mg. Inside it the label names L-Citrulline dl-Malate, L-Arginine (Alpha-Ketoglutarate dihydrate) and L-Arginine HCL. It does not say how much of each is in a capsule.
The front of the bottle reads "Advanced Support" with three starred lines, "Heart Support*", "Circulation Support*" and "Natural Formula*". The sales site goes further, with a headline about "Support Healthy Blood Flow" and lines such as "Assist in Maintaining Healthy Nitric Oxide Levels". It cites no studies 3. This site does not repeat those lines as findings.
Melonex is not a medicine and is not FDA-approved. By law the FDA does not approve dietary supplements or their labels 4, and a structure-style claim may not say a product treats or prevents a disease 5.
01
Capsules only
The label is for capsules: a plant-cellulose shell, microcrystalline cellulose and magnesium stearate. No drops, gummies or tablets are sold. See the capsule form page.
02
One blend, three names
L-citrulline malate and two forms of L-arginine share one 500 mg line. The label lists them from most to least by weight, so each name has a ceiling and a floor, not an amount.
03
No test of the product
We found no trial of Melonex. The studies below look at arginine or citrulline on their own, at gram doses, so they describe those ingredients, not this capsule.
Claims and evidence02
Does Melonex work for blood pressure?
The label and the sales site use warm words. Here are the lead lines, each next to what public health sources say.
No one can say yet, because we found no study of Melonex. The ingredient research is small, mixed and done at much higher amounts than one capsule holds.
“Heart Support*”
A label description with a star that leads to the FDA statement. No source linked here tests this blend. The arginine and citrulline studies measure blood pressure and use grams a day; the whole blend is 500 mg. 6 7
“Circulation Support*”
The body's own nitric oxide helps keep vessels open. In one trial of 12 g a day of arginine AKG, nitric oxide markers did not rise more than with placebo. 8 9
“Natural Formula*”
A description with no set meaning. NIH says 'natural' does not always mean safe; the three names inside the blend are amino acids joined to salts, and their amounts are not printed. 10 4
Pooled trials of L-arginine alone showed small average drops in blood pressure, around 6 over 3 mm Hg 6. For citrulline the results are mixed: one pooled analysis found a drop of about 4 mm Hg in the top number and none in the bottom, and another found no effect 11 12. NCCIH says no dietary supplement has been shown to have effects comparable to blood-pressure drugs 13.
- Label front“Heart Support*”Structure/function-style wording. The star leads to the FDA statement: not evaluated by the FDA, not intended to treat any disease. No source linked here tests this blend. 5
- Sales site“Support Balanced Blood Pressure Levels”No study is cited on the site, and we found no trial of Melonex. NCCIH says no dietary supplement has been shown to have effects comparable to blood-pressure drugs. 3 13
- Sales site“Assist in Maintaining Healthy Nitric Oxide Levels”The lining of blood vessels makes nitric oxide, which helps them relax. In a 7-day trial, 12 g a day of arginine AKG raised blood arginine but not nitric oxide markers compared with placebo. 8 9
- Sales site“Promote Healthy Blood Vessel Function”In pooled trials, citrulline improved flow-mediated dilation but did not significantly improve pulse wave velocity overall. A trial of about 9 g a day of arginine after a heart attack saw no change in vascular stiffness. None tested this blend. 14 15
- Sales site“immediate relief of arterial pressure”An ingredient note on the sales site. The trials we found followed blood pressure over 1 to 17 weeks, not minutes, and only a cuff or clinic reading shows pressure. 3 11
- Common claim“L-arginine helps blood pressure”Pooled trials of arginine alone show small average drops (about 6/3 mm Hg) at grams a day. Mayo says it might help; MSK calls the evidence mixed and limited. 6 16 17
- Common claim“Citrulline helps blood pressure”Mixed: one pooled analysis found a systolic drop of about 4 mm Hg and no clear diastolic change; another found no effect. Doses were 3 to 8 g a day. 11 12 18
- Common question“Can it replace my blood-pressure medicine?”No. AHA says never cut back or quit on your own, and that no pills, vitamins or drinks replace prescription medicines and lifestyle changes. 19
Claims as printed on the sales site 3 and the label. Health claims need competent and reliable scientific evidence, generally human trials of the same product 20.
The formula03
What is in the Melonex proprietary blend?
The Melonex blend holds three named ingredients: L-citrulline dl-malate, L-arginine alpha-ketoglutarate and L-arginine HCl. Together they weigh 500 mg per capsule.
A blend may hide the single amounts, but it must list its parts from the most to the least by weight 21. That order gives each name a ceiling. The second name is at most 250 mg, and the third is at most 167 mg. The first is at least 167 mg and could be most of the blend.
- 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.
These are limits from the order of the list, not measured amounts. We have not tested a capsule, and the brand does not print the split. The proprietary blend page shows the math.
The numbers04
Is a 500 mg blend enough to matter?
Nobody can say, because the research used far bigger amounts of one ingredient at a time. A whole Melonex capsule weighs 500 mg for all three names together.
The citrulline summaries we read used 3 to 8 g a day 18. A sports trial of arginine AKG used 12 g a day 22. At the label's top dose of two capsules, the whole blend is 1 g a day, which is below every study dose we found, even if all of it were one ingredient.
A study dose says what was tested, not what is right for you. Chemistry also matters: the names are salts, so the amino acid inside weighs less than the salt. Ask your doctor before you treat any capsule as a stand-in for a studied dose.
Your numbers05
What do blood pressure numbers mean?
Blood pressure is two numbers, top over bottom, in mm Hg. Normal is under 120 over 80, and high blood pressure is 130 over 80 or more 23.
It usually has no signs or symptoms, so only a cuff or a clinic visit shows it 23. Only a doctor or another medical professional can confirm a diagnosis 24. Type a reading below to see which band it falls in. It is a teaching aid, not a test.
Type a reading to see where it falls.
- NormalBelow 120 and below 80
- Elevated120 to 129 and below 80
- Stage 1130 to 139 or 80 to 89
- Stage 2140 or higher or 90 or higher
- Crisis rangeAbove 180 and/or above 120: call your clinician; with chest pain or trouble speaking, call 911
Bands from the CDC, NHLBI and AHA 23 25 24. One reading is not a diagnosis: only a doctor or other medical professional can confirm high blood pressure, and no tool on the gauge measures your pressure. Use a validated upper-arm cuff 1.
Want to measure at home? The four-step coach beside the bottles at the top follows the American Heart Association's steps, and the home monitoring page has the full list.
How to take it06
How do you take Melonex capsules?
Take one capsule a day with an 8 oz glass of water. The label also says you may take up to two capsules a day.
The sales site suggests the morning 3. The label sets no time of day, so pick one you can keep. Do not exceed the recommended dose, and ask your doctor before you go to two.
- 01
Check the seal and your list
On a new bottle, check that the safety seal is intact. Read the Supplement Facts. Note any blood-pressure medicine you take.
- 02
Pour an 8 oz glass of water
The label says to take one capsule with an 8 oz glass of water. The sales site suggests the morning.
- 03
Take one capsule
One capsule a day is the label's starting line. The label also says you may take up to two a day; ask your doctor before going above one.
- 04
Keep your blood-pressure checks
A bottle lasts 60 days at one capsule a day. Keep your cuff or clinic readings going, and share what you take with your doctor.
A bottle lasts 60 days at one capsule a day and 30 days at two. More on the how to use page.
The label07
What does the Melonex label say?
The label says one capsule a day with 8 oz of water, keep it cool and dry, and ask a physician first if you are pregnant, nursing, under 18 or have a medical condition.
Tap a number to read that part of the label. Every word is also typed out on the supplement facts page.
Tap a number to read that part of the label.
- Suggested use
One capsule a day with an 8 oz glass of water. The label adds: 'May take up to two (2) capsules daily.'
- Storage
Keep away from heat, light and humidity to preserve freshness.
- Caution
Do not exceed the dose. Pregnant or nursing mothers, children under 18 and anyone with a known medical condition: ask a physician first.
- Seal and children
Keep out of the reach of children. Do not use if the safety seal is damaged or missing. Store in a cool, dry place.
- Made in the USA
'Made in the USA with globally sourced ingredients.' The countries are not named.
- Distributor
Distributed for Instituto Experience, Lakeland FL 33804, +1 (507) 448-8190, [email protected]. The maker is not named.
- Framed red dot
A small framed red dot above the wordmark. The label does not explain it.
- Melonex wordmark
The brand name in maroon capitals-and-lowercase serif type. No registered-mark symbol is printed.
- Advanced Support
A product line under the name. It is not defined anywhere on the label.
- Heart Support*
The first of three starred icons. The star leads to the FDA statement on the right.
- Circulation Support*
The second starred icon, with the same FDA statement behind it.
- Natural Formula*
The third starred icon. 'Natural' has no set meaning for supplements.
- Size
'60 capsules' and 'Dietary Supplement'.
- Serving
Serving size 1 capsule, 60 servings per container.
- One blend, 500 mg
Proprietary Blend 500 mg, listing L-Citrulline dl-Malate, L-Arginine (Alpha-Ketoglutarate dihydrate) and L-Arginine HCL. No amount is printed for any of the three. No daily value is set.
- Other ingredients
Hydroxypropyl methylcellulose (capsule), microcrystalline cellulose, magnesium stearate. No allergen line is printed.
- FDA statement
Not evaluated by the FDA; not intended to diagnose, treat, cure or prevent any disease.
- FDA registered facility
'This product has been manufactured in an FDA registered facility.' The facility is not named.
| Line | What the label prints |
|---|---|
| Serving | 1 capsule; 60 servings per container |
| Proprietary Blend | 500 mg per capsule; Daily Value not established |
| Named inside the blend | L-Citrulline dl-Malate, L-Arginine (Alpha-Ketoglutarate dihydrate), L-Arginine HCL; no amounts |
| Other ingredients | Hydroxypropyl methylcellulose (capsule), microcrystalline cellulose, magnesium stearate |
| Suggested use | 1 capsule daily with an 8 oz glass of water; may take up to 2 daily |
Before you order08
Is Melonex safe to take with your medicines?
Not always. Arginine can add to blood-pressure medicines, and three health sources advise against it after a recent heart attack 16 17 26.
Answer five quick questions. The checklist runs in your browser and saves nothing. It is not medical advice.
Read the side effects and cautions page and the supplements and medicines page before you order.
What helps09
What actually moves blood pressure?
Sodium, weight, eating pattern, activity, sleep and tobacco move blood pressure, and medicine does when a doctor prescribes it.
Those steps have the strong evidence. NHLBI says a DASH eating plan with less salt can work about as well as medicine for some people 27. AHA says no pill, vitamin or drink replaces prescription medicine and lifestyle change 19.
- SodiumThe DASH plan sets a limit of 2,300 mg of sodium a day, or 1,500 mg if desired. Mayo Clinic estimates that cutting to 1,500 mg or less lowers pressure about 5 to 6 mm Hg. 28 29
- WeightAbout 1 mm Hg lower for each kilogram (2.2 pounds) lost, per Mayo Clinic's estimate. 29
- Eating patternA DASH-style plan with less salt can work about as well as medicine for some people; Mayo estimates up to 11 mm Hg from a healthy diet. 28 27 29
- ActivityRegular aerobic exercise lowers systolic pressure about 5 to 8 mm Hg. Adults are advised 2.5 hours of moderate activity a week. 29 30
- Tobacco and sleepQuitting tobacco and getting 7 to 9 hours of sleep are two of Life's Essential 8. 30
- Not knowingAbout 1 in 3 U.S. adults with high blood pressure are unaware and untreated. It has no symptoms, so only measuring shows it. 25 23
Pricing10
How much is Melonex?
Melonex costs $49 to $79 a bottle on the sales site: 2 bottles for $158, 3 for $207 and 6 for $294. The 3 and 6 bottle kits ship free in the US; the 2 bottle kit adds $9.99.
Each bottle is 60 capsules, or 60 days at one a day. That makes the 6-bottle kit about $0.82 a day. Prices are as listed on October 30, 2026, and the checkout shows the final total.
Free US shipping
3 bottles180 capsules · 180 days
$207total
$69 a bottle
- Lasts
- 180 days at 1 capsule a day
- Per day
- about $1.15
Free US shipping
- 180 days at 1 capsule a day (90 at 2)
- Free US shipping
- 60-day money-back guarantee
Lowest per bottle
6 bottles360 capsules · 360 days
$294total
$49 a bottle
- Lasts
- 360 days at 1 capsule a day
- Per day
- about $0.82
Free US shipping
- 360 days at 1 capsule a day (180 at 2)
- Free US shipping
- 60-day money-back guarantee
Prices on the Melonex sales page, October 30, 2026 3. The 2-bottle kit adds $9.99 shipping on the buy page; the 3- and 6-bottle kits are listed with free US shipping. Per-day figures use 60 capsules a bottle at 1 capsule a day; the label also allows up to 2 capsules a day, which halves the days (the sales site counts the days differently on its two pages). We never show the struck "total value" prices; the checkout shows the final total.
Not sure how many you need? Slide the months below.
You need 3 bottles. The 3-bottle pack covers it for $207 ($69 a bottle).
Uses the buy-page prices: $158 for 2 bottles (plus $9.99 shipping), $207 for 3 and $294 for 6. Bottle icons fill one per bottle. A planning aid only; the checkout shows the final total and any shipping.
Compare more on the pricing page. Every pack carries the 60-day money-back guarantee; read the guarantee page for its limits.
Reviews11
What do Melonex customers say?
This site shows no stars, counts or quotes yet. We publish a customer review only after the order desk matches it to a real order.
The cards below hold the vendor's review photos with empty fill-in fields. The FTC bans fake and paid-for reviews 31. See how we check them on the reviews page.
4.4out of 5
Based on 679 verified ratings
Filled in only from reviews matched to a real order. How we check reviews.
I travel for installs. Capsule with water. Cuff at the clinic is still the score. I don't skip that visit. I keep it by the hymnals. I take it before I walk the mall.
Pack review 1, as supplied · Photo supplied by the vendor
I teach, then I commute. Checkout had prices and a 60-day line. No panel. I waited for the bottle. I keep it in the tackle box. I take it before league night.
Pack review 2, as supplied · Photo supplied by the vendor
I keep a workshop in the garage. Wanted the home cuff to drop in ten days. It didn't. Kept the routine. I keep it on the sewing table. I take it after I lock the register.
Pack review 3, as supplied · Photo supplied by the vendor
FAQ12
Melonex questions people ask
What is Melonex?
Melonex is a dietary supplement in capsule form, sold in a 60-capsule bottle. The label front reads Advanced Support with three starred lines: Heart Support*, Circulation Support* and Natural Formula*. It is not a medicine, and it is not a blood-pressure treatment.
How do I take Melonex?
The label says to take one capsule a day with an 8 oz glass of water, and that you may take up to two capsules a day. The sales site suggests the morning. Do not go over the label dose, and ask your doctor before taking two.
Does Melonex lower blood pressure?
No source we found tested Melonex, so no one can say it does. Studies of arginine or citrulline alone show small average changes at gram-a-day amounts, and one Melonex capsule holds one 500 mg blend of three names. Only a cuff or clinic reading shows your own numbers.
Can I take Melonex with blood-pressure medicine?
Ask your doctor or pharmacist first. Mayo Clinic, MSK and Cleveland Clinic warn that arginine can add to the effect of blood-pressure medicines. Keep taking prescribed medicine exactly as directed, and never cut back because of a supplement.
How much does Melonex cost?
The sales site lists 2 bottles at $79 each ($158 plus $9.99 shipping), 3 bottles at $69 each ($207, free US shipping) and 6 bottles at $49 each ($294, free US shipping). The checkout page shows the final total.
What is the Melonex guarantee?
The sales site describes a 60-day money-back guarantee and asks for at least 30 days of continuous use. Its FAQ adds that only sealed bottles qualify and that a 20% restocking fee applies, so read the live policy before you order.
More answers are on the full FAQ page. For an order you have placed, or a refund, call +1 (855) 889-3137.