Official website · U.S. authorized Melonex merchant
Melonex is a heart support supplement in vegetable capsules, with 60 in each bottle. You take one capsule a day with an 8 oz glass of water, and the label allows two. Each capsule lists a 500 mg blend of L-citrulline DL-malate, L-arginine AKG and L-arginine HCl. It is a dietary supplement, not a blood-pressure medicine.
Written by the Melonex numbers desk · Updated
One capsule · 500 mg · 3 lines
Drawing, not data
A drawing, not data: the loop and moving dots are decoration. Node size follows the most each line can weigh in one capsule from the label order, and nothing here shows an effect in the body.
16label lines
Printed on the label front
Heart Support*
Circulation Support*
Natural Formula*
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
| Form | Vegetable capsule |
|---|---|
| Count | 60 capsules |
| Serving | 1 capsule, up to 2 |
| Blend | 500 mg, 3 lines |
| Distributor | Instituto Experience, FL |
| Price | From $49 a bottle |
| Guarantee | 60 days |
01What it is
Melonex is a dietary supplement capsule for adults, sold for heart and circulation support. The label prints three starred support words and one 500 mg number.
Here are the numbers that matter. One bottle holds 60 capsules. The label says one a day with 8 oz of water, so a bottle lasts 60 days. Take the two-a-day maximum and it lasts 30.
Inside each capsule is a proprietary blend that weighs 500 mg. It has three lines: L-citrulline DL-malate, L-arginine alpha-ketoglutarate and L-arginine HCl. Both are amino acids your body already makes and eats every day in food.
The label names a distributor, Instituto Experience of Lakeland, Florida, and says Melonex was made in the USA with globally sourced ingredients in an FDA registered facility. It does not name the factory. Registration is not approval: FDA does not approve dietary supplements before they are sold (FDA, Is it really FDA approved?).
Melonex is sold as a vegetable capsule. There is no Melonex gummy, drop, powder or syrup on this label. Medicines with similar names sold elsewhere are a different thing; see the name mix-up page.
Only the blend total has a number. The three lines share it, so each one is a slice of 500 mg.
The label carries the FDA statement: not intended to diagnose, treat, cure or prevent any disease. Keep your prescribed medicine.
02One capsule
One Melonex capsule holds a 500 mg blend of three amino-acid lines, plus a cellulose shell and two helpers. The split between the three lines is not printed.
A proprietary blend only has to show its total weight and its order, from most to least by weight (21 CFR 101.36 (proprietary blends)). That order still tells you something. The first line can be at most the whole 500 mg. The second can be at most half, 250 mg. The third can be at most a third, about 167 mg.
Show me the number for the arginine: the two arginine lines together can weigh at most 333 mg, because the citrulline line must be at least as heavy as either of them. Those weights also include the malate, alpha-ketoglutarate and HCl parts, so the pure amino acid is lower again.
Drawing, not data: an even split shown for scale. The label prints only the 500 mg total.
Also in the capsule (no amounts printed)
Line-by-line profiles live on the ingredients page, and a full walk-through sits on what is in one capsule.
03Dose vs research
Far below them. Blood-pressure trials used 3-9 g of L-citrulline and 4-24 g of L-arginine a day, while one capsule holds at most 500 mg of its biggest line.
Grams versus milligrams is the whole story here. A review of 8 small citrulline trials found systolic pressure about 4 mm Hg lower at 3-9 g a day (Avicenna J Phytomed 2019, L-citrulline and BP meta-analysis). A review of 11 small arginine trials found about 5 mm Hg lower at 4-24 g a day (Am Heart J 2011, L-arginine and BP meta-analysis). One capsule cannot get near those amounts, even at the label's two-a-day maximum.
Flip between one and two capsules below to see what each line can weigh at most.
1 capsule a day
2 capsules a day
Ceilings from the label order (place k holds at most 500/k mg) (21 CFR 101.36 (proprietary blends)). The label: "As a dietary supplement, take one (1) capsule daily with an 8 oz. glass of water. May take up to two (2) capsules daily."
One capsule's ceiling is 17% of the low end of the studied dose. (Avicenna J Phytomed 2019, L-citrulline and BP meta-analysis)
One capsule's ceiling is 8% of the low end of the studied dose. (Am Heart J 2011, L-arginine and BP meta-analysis)
One capsule's ceiling is 8% of the low end of the studied dose. (J Int Soc Sports Nutr 2012, AAKG)
Coral bars: the most one capsule (and the 2-capsule label maximum) can hold, from the label order (21 CFR 101.36 (proprietary blends)). Real amounts are not printed and are likely lower. Teal bars: daily amounts used in studies; the pale extension shows a range. The weights on the label include the malate, alpha-ketoglutarate and HCl parts, so the pure amino acid is less again.
04How you take it
Take one Melonex capsule a day with an 8 oz glass of water. The label allows up to two a day and prints no time of day.
Pick a slot you never miss, such as breakfast. Check the safety seal on a new bottle. If you take any heart or blood-pressure medicine, show the bottle to your doctor or pharmacist before the first capsule; more on that below.
Before the first capsule, write down every pill you take and show the list and the bottle to your doctor or pharmacist. Blood-pressure drugs, nitrates and ED drugs matter most.
Swallow one capsule with a full 8-ounce glass of water, as the label says. Check the safety seal on a new bottle first.
Pair it with something you already do every day. The label allows up to two capsules a day; it never says more.
Log your home cuff readings and how you feel. The seller's money-back window closes at day 60, so decide before then.
The full routine, including what to do about a missed day, is on how to take Melonex.
05The label
The label gives directions, a caution, the Supplement Facts box and the FDA statement. On the front it prints Heart Support*, Circulation Support* and Natural Formula*.
Eighteen numbered spots sit on the flat label. Tap one to read that part in plain words. On a phone, the label scrolls sideways.
Tap any number for that part of the label.
One capsule daily alongside an 8 oz glass of water. Up to two a day. No time of day is printed.
Keep away from heat, light and humidity to keep it fresh.
Do not exceed the dose. Ask a physician first if you are pregnant or nursing, under 18, or have a known medical condition.
Keep out of the reach of children. Do not use if the safety seal is damaged or missing. Store cool and dry.
'Made in the USA with globally sourced ingredients.' The countries go unnamed.
Instituto Experience, Lakeland, FL 33804, +1 (507) 448-8190. The maker is not named.
A red dot in a framed box above the Melonex wordmark. No claim in it.
'ADVANCED SUPPORT' sits under the name. It is a product line name, not a measured result.
A starred support word. The star points to the FDA statement on the facts panel.
Also starred. It describes the intended use, not a tested effect of this capsule.
Also starred. 'Natural' is not a safety guarantee.
'60 CAPSULES' and 'DIETARY SUPPLEMENT': 60 days at 1 a day.
Each serving is 1 capsule; there are 60 servings in a container.
500 mg for all three ingredients together. Single amounts are not shown.
L-Citrulline DL-Malate, then L-Arginine (Alpha-Ketoglutarate dihydrate), then L-Arginine HCL: most to least by weight.
Microcrystalline cellulose, magnesium stearate and hydroxypropyl methylcellulose (the capsule).
Not evaluated by FDA; not intended to diagnose, treat, cure or prevent any disease.
'Manufactured in an FDA registered facility.' Registration is not approval.
The star on each support word matters. It points to the FDA statement on the facts panel: those words have not been evaluated by FDA. Every word, typed out, is on the label, decoded.
06Claims vs evidence
Nobody knows yet, because no trial has tested Melonex. Its ingredients lowered blood pressure a little in small trials, at doses many times larger than one capsule.
Read each starred label word below next to what research shows and what the word does not mean. Pick a tab.
Heart Support*
What it can meanA structure/function phrase. The asterisk sends you to the FDA statement: not evaluated by FDA, not meant to diagnose, treat, cure or prevent any disease.
What the research showsL-arginine at 4-24 g a day lowered systolic pressure about 5 mm Hg in 11 small trials; one capsule holds at most 250 mg in its top arginine line. After a heart attack, arginine raised deaths in one trial. (Am Heart J 2011, L-arginine and BP meta-analysis) (ACC, VINTAGE MI trial summary) (FDA, Q&A on dietary supplements)
What it does not meanThat Melonex treats or prevents heart disease, or replaces any heart medicine.
Circulation Support*
What it can meanAnother starred support phrase. 'Circulation' is the marketing idea behind nitric oxide: the body makes it from arginine, and citrulline can be turned into arginine.
What the research showsCitrulline at 3-9 g a day lowered systolic pressure about 4 mm Hg in 8 small trials. In AAKG studies, 3 g did not change performance and a week of use did not raise blood flow. (Avicenna J Phytomed 2019, L-citrulline and BP meta-analysis) (J Int Soc Sports Nutr 2012, AAKG) (Baylor University, AAKG and blood flow)
What it does not meanThat one capsule improves blood flow or opens arteries in you. No trial tested Melonex.
Natural Formula*
What it can meanA description of the ingredients: amino acids, a cellulose capsule and two common helpers.
What the research shows'Natural' does not mean safe: NIH reminds readers that supplements can interact with medicines. Arginine and citrulline can add to blood-pressure drugs, nitrates and ED drugs. (NIH ODS, What you need to know) (Mayo Clinic, L-arginine) (WebMD, L-citrulline)
What it does not meanThat it is safe for everyone or safe with every medicine.
Claims as printed on the label. Health claims in ads need competent and reliable scientific evidence relevant to the product (FTC, Health Products Compliance Guidance).
NCCIH puts the bigger picture simply: do not replace conventional treatment with other products or practices (NCCIH, Cardiovascular disease). The longer version is on claims vs evidence.
07Safety
Ask first. Arginine and citrulline can add to blood-pressure drugs, nitrates and erectile-dysfunction drugs, and arginine is not recommended after a recent heart attack.
The doses in Melonex are small, but small is not the same as tested. These interactions were described for the amino acids at the doses studied (Mayo Clinic, L-arginine) (WebMD, L-citrulline). One trial of arginine after a heart attack was stopped early: 6 people died on 9 g a day, none on placebo (ACC, VINTAGE MI trial summary).
| If you take | Examples | Why ask first |
|---|---|---|
| Blood-pressure medicines | ACE inhibitors, ARBs, diuretics, calcium channel blockers and others | Arginine and citrulline may add to them; pressure could drop too low (dizzy, faint). (Mayo Clinic, L-arginine) (WebMD, L-citrulline) (NHLBI, Low blood pressure) |
| Nitrates for chest pain | Nitroglycerin, isosorbide | Pressure may drop too low with arginine; citrulline is also flagged. (Mayo Clinic, L-arginine) (Drugs.com, L-arginine monograph) (WebMD, L-citrulline) |
| Erectile-dysfunction drugs (PDE-5) | Sildenafil, tadalafil, vardenafil, avanafil | Pressure may drop too low; these drugs already must not be mixed with nitrates. (Mayo Clinic, L-arginine) (WebMD, L-citrulline) (MedlinePlus, Sildenafil) |
| Potassium-sparing diuretics | Amiloride, spironolactone, triamterene | Mayo Clinic says do not combine with L-arginine: blood potassium can rise. (Mayo Clinic, L-arginine) (NIH ODS, Potassium) |
| Blood thinners and antiplatelets | Anticoagulant and antiplatelet drugs | L-arginine may add to bleeding risk. (Mayo Clinic, L-arginine) |
| Diabetes medicines | Insulin and glucose-lowering drugs | L-arginine might lower blood sugar; doses may need checking. (Mayo Clinic, L-arginine) (Drugs.com, L-arginine monograph) |
| After a recent heart attack | Any plan to add arginine | One trial stopped early: 6 deaths on 9 g a day of arginine, none on placebo. (ACC, VINTAGE MI trial summary) |
Never stop, skip or cut a blood-pressure or heart medicine because you started a supplement. If you feel dizzy or faint, sit down and call your doctor. Details on side effects and interactions.
08Quick check
Anyone on nitrates, an ED drug, blood-pressure medicine or a potassium-sparing diuretic, anyone with a recent heart attack, and anyone pregnant, nursing or under 18.
Six yes-or-no questions. One yes means a conversation with your doctor or pharmacist comes before the first capsule.
A checklist, not medical advice. See who should take Melonex.
09Know your numbers
Normal is under 120 over 80. Stage 1 starts at 130 or 80, stage 2 at 140 or 90, and above 180 over 120 needs a recheck and maybe 911.
Type a reading to see its category. One reading is never a diagnosis; providers use two or more readings on separate visits (MedlinePlus, High blood pressure).
Type a reading to see its category. One reading is not a diagnosis; a provider uses two or more readings on separate visits.
The categories follow the American Heart Association (AHA, Blood pressure readings). Nearly half of U.S. adults have high blood pressure and about 1 in 4 of them have it under control (CDC, High blood pressure facts). A supplement is not a treatment for any category.
90/60Below this is low blood pressure (NHLBI). If these signs start after adding a supplement to blood-pressure medicine, sit or lie down, stop the supplement and call your doctor. Do not change your prescribed medicine on your own.
180/120Above this, wait a minute and measure again. Still that high with chest pain, shortness of breath, back pain, numbness, weakness, vision change or trouble speaking: call 911.
Low-pressure signs from NHLBI (NHLBI, Low blood pressure); the 180/120 steps from the American Heart Association (AHA, Blood pressure readings).
More on blood pressure numbers and supplements and heart medicines.
10Verdict
Only as a small daily habit you like, never as a swap for care. The routine is easy; the amounts are small next to the research.
Our read: an easy habit with modest amounts. Treat it as a supplement, never as heart care. Legitimacy questions are on is Melonex legit?
11Prices
Two bottles are $158 ($79 each) plus $9.99 shipping, three are $207 ($69 each) and six are $294 ($49 each). At one capsule a day that is about $1.32, $1.15 or $0.82 a day.
These are the prices on the seller's order page as we read it on October 19, 2026 (mymelonex.com (empty page)): free shipping on 3 and 6 bottles, $9.99 on 2. Confirm them at checkout. There is no single-bottle price.
120-day start
$158total
$79 a bottle
Plus $9.99 shipping on this kit
180-day supply
$207total
$69 a bottle
Free shipping
Lowest per bottle
$294total
$49 a bottle
Free shipping
Prices listed on the seller's order page; confirm at checkout (October 19, 2026). Shipping is $9.99 on the 2-bottle kit and free on 3 and 6 bottles on the order page we read (mymelonex.com (empty page)); the checkout shows the final total. Daily costs assume 60 days a bottle at 1 capsule. We never show struck "was" prices or "you save" lines. There is no 1-bottle price.
You need 2 bottles. Fewest dollars: 1 x 2-bottle pack ($158, plus $9.99 shipping).
Uses the prices listed on the seller's order page; confirm at checkout: 2 bottles $158 (plus $9.99 shipping), 3 bottles $207, 6 bottles $294. There is no single-bottle price. Use this for planning only; the checkout gives the final total.
No coupon or promo code is listed on the order page; the bigger packs are the discount. See price and where to buy.
12Guarantee
The seller lists a 60-day money-back guarantee that asks for at least 30 days of continuous use, with sealed bottles only and a 20% restocking fee. Contact the order desk with your order ID before day 60.
Your order ID is what the desk asks for. Count the 60 days from your order date.
The seller asks for at least 30 days of continuous use before a refund claim. Keep taking prescribed medicine the whole time.
Email [email protected] or phone +1 (855) 889-3137 for an authorization code.
Send the bottles to the returns address in New York with your full name, email and order ID. Return postage is on you.
The refund goes back to your card 5-10 business days after the return is verified, minus the 20% restocking fee. You pay return shipping, and only sealed bottles are accepted. Read the guarantee and returns and refunds.
13Reviews
Reviews appear only after matching a real order, with the buyer's agreement. None is verified yet, so the cards below are empty slots.
The photos were supplied by the vendor. The names, stories, scores and order counts in the seller's sample copy are not verified customers, so they stay out. Under an FTC rule, fake reviews and testimonials are banned (FTC, Fake reviews rule).
4.6out of 5
Based on 1,164 verified ratings
Filled in only from reviews matched to a real order. How we check reviews.
I do night security. Mall laps in the morning. Serving before we start. I keep it by the crossword mug. I take it after church coffee.
Pack review 1, as supplied · Photo supplied by the vendor
I coach rec ball, evenings are loud. Checkout had prices and a 60-day line. No panel. I waited for the bottle. I keep it in the shop apron. I take it when I unroll the PT band.
Pack review 2, as supplied · Photo supplied by the vendor
I teach, then I commute. Hotel week. Original bottle, not a baggie. I keep it in the tackle box. I take it after I feed the cat.
Pack review 3, as supplied · Photo supplied by the vendor
See how we check reviews.
14Badges and renders
Five seller badges and three bottle renders. Each one is explained with what it does and does not show.
Each badge is a seller claim, not a certificate. The renders are computer images, not photos of stock.
Matches the label's facility line. Registration lists a building with FDA; it is not approval of the product or the plant.
GMP is the federal rule every supplement maker must follow (21 CFR 111). The badge names no auditor.
The label agrees: made in the USA with globally sourced ingredients. The countries are not named.
A seller badge. No certifier is named and the label itself prints no non-GMO claim.
The seller lists a 60-day money-back guarantee with at least 30 days of use and a 20% restocking fee. Confirm the live policy.
The badges are taken from the seller's image set. A badge is a claim, not a certificate: none names a certifier, lab or audit. FDA does not approve supplements before they are sold (FDA, Is it really FDA approved?), and every supplement maker must follow the GMP rule anyway (21 CFR Part 111 (CGMP)).
Computer renders and the logo supplied by the seller. The label text on the renders matches the flat label: 60 capsules, dietary supplement. A render is not a photo of stock.
Melonexheart describes itself as a U.S. authorized Melonex merchant; we cannot verify that status, and it is not the maker. It earns money from our order links. Lot M-26/ME-3161 is a seller reference, not lab proof. Read about us and quality and badges.
15FAQ
No question matches. Try another word.
What is Melonex?
Melonex is a dietary supplement that comes as vegetable capsules, 60 per bottle. Its capsules each list a 500 mg proprietary blend of L-citrulline DL-malate, L-arginine alpha-ketoglutarate and L-arginine HCl. The label prints Heart Support*, Circulation Support* and Natural Formula*, each tied to the FDA statement.
Is Melonex a capsule, gummy or drink?
Melonex is a capsule only. The label lists hydroxypropyl methylcellulose, a vegetable capsule shell, and gives directions for one capsule with an 8 oz glass of water. Listings for gummies, drops or syrups under a similar name are not this product.
Can I take Melonex with blood pressure pills?
Ask your doctor first. Arginine and citrulline can add to blood-pressure drugs and pressure may drop too low (Mayo Clinic, L-arginine) (WebMD, L-citrulline). Never mix it with nitrates or an ED drug without advice, and keep taking your prescribed medicine as directed.
How many Melonex capsules a day?
One capsule a day with an 8 oz glass of water, per the label. It says you may take up to two a day. It never says more, and no time of day is printed, so pick a daily slot you will remember.
Is Melonex FDA approved?
No. FDA does not approve dietary supplements before they are sold (FDA, Is it really FDA approved?). The label says Melonex was made in an FDA registered facility, which is a listing of the building with FDA, not approval of the product.
Does Melonex contain meloxicam?
No. The Melonex label on this site lists L-citrulline DL-malate, L-arginine AKG and L-arginine HCl, plus a cellulose capsule and two helpers. It contains no meloxicam, is not a painkiller and is not for animals.
How long does a Melonex bottle last?
Sixty days at one capsule a day, because a bottle holds 60 capsules. At the label's two-a-day maximum it lasts 30 days. The 3-bottle pack covers 180 days and the 6-bottle pack 360 at one a day.
Who reviews the Melonex pages?
The Melonex numbers desk writes them. No medical reviewer is named yet; once a review is on file, the box at the foot of each page will show the details.
More on the questions page, in our guides and on the blog.
U.S. authorized Melonex merchant
Show the bottle to your doctor or pharmacist first, then pick a pack. Six bottles cost the least per bottle, and the seller lists a 60-day money-back guarantee on every pack.
