Blog
The Arginine Blood Pressure Meta-Analysis, in Plain Words
The arginine blood pressure meta-analysis by Dong and colleagues in 2011 pooled 11 trials with 387 adults who took 4 to 24 grams of oral arginine a day. Systolic pressure averaged 5.39 mm Hg below placebo and diastolic 2.66 mm Hg. The doses were grams, and none of the trials tested Melonex.
Written by the Melonexcare editorsUpdated · 4 min read
No. 01The study
What is the arginine blood pressure meta-analysis?
The arginine blood pressure meta-analysis is a 2011 review that pooled the results of 11 trials into one set of averages.
A meta-analysis is a study of studies. Researchers gather trials that asked the same question, then combine the numbers so small groups add up to a bigger picture.
This one covered 387 people taking oral arginine, 4 to 24 g a day, against placebo (Dong 2011, arginine and BP).
It is the paper most often quoted when arginine and blood pressure come up together, so it helps to know what it actually says. Think of it as one careful snapshot of trials up to 2011, not a final word.
No. 02What it found
What did the arginine trials find?
Compared with placebo, systolic pressure fell about 5.39 mm Hg and diastolic about 2.66 mm Hg, on average.
The range around each number matters too. For systolic it ran from 8.54 to 2.25 mm Hg lower, and for diastolic from 3.77 to 1.54 lower (Dong 2011, arginine and BP). The results looked similar in trials of 4 weeks or longer and in people not taking pressure medicine.
| Trials pooled | 11, all randomized against placebo |
|---|---|
| People | 387 adults in total |
| Arginine dose | 4 to 24 g a day by mouth |
| Systolic change | 5.39 mm Hg lower on average |
| Diastolic change | 2.66 mm Hg lower on average |
To a doctor, 5 mm Hg is a modest shift, and group averages hide wide differences between people. It is not a substitute for a treatment plan.
No. 03The limits
What can this meta-analysis not tell you?
It cannot tell you what a 500 mg blend does, how long any effect lasts, or whether it protects your heart.
The doses were grams, and Melonex holds a blend of 500 mg with three ingredients. The groups were small. Blood pressure readings are also only a stand-in for heart outcomes like heart attacks.
Dose gap
The lowest trial dose, 4 g, is eight times the whole capsule.
Short and small
387 people across 11 trials is a modest base.
Reading, not result
A lower number on the cuff is not a measured drop in heart attacks.
WebMD sums it up: most research shows arginine may give small improvements, and it may not be enough to manage the condition (WebMD, L-arginine).
No. 04A caution
Is there a safety warning that goes with it?
Yes. In the VINTAGE MI trial, 153 adults took arginine, 9 g a day, after a first heart attack, and six died on arginine versus none on placebo.
The safety board stopped that trial early (VINTAGE MI trial (ACC summary)). Mayo Clinic does not recommend oral arginine after a recent heart attack (Mayo Clinic, L-arginine). The benefit seen in healthy volunteers did not carry over.
Now look at the label side, line by line. Only the two arginine lines belong to this research, and each is a salt weight inside a blend.
- 1L-Citrulline DL-MalateBlend place 1 · at most 500 mg per capsule
- 2L-Arginine (Alpha-Ketoglutarate dihydrate)Blend place 2 · at most 250 mg per capsule
- 3L-Arginine HCLBlend place 3 · at most 167 mg per capsule
- 4Hydroxypropyl Methylcellulose (capsule)Other ingredient · no amount listed
- 5Microcrystalline CelluloseOther ingredient · no amount listed
- 6Magnesium StearateOther ingredient · no amount listed
From the Supplement Facts panel. Places 1-3 are the 500 mg blend, listed from most to least by weight (21 CFR 101.36). The other three lines make the capsule and help it fill; they carry no listed amount.
Keep taking prescribed medicine, and tell your doctor about any supplement, particularly with a heart history.
No. 05Using it well
How should you use a study like this?
Use it to ask better questions, not to pick a product.
Bring the numbers to your visit if they help. Ask your doctor whether a supplement belongs beside your habits and medicine. Read the benefits page to see the label wording next to the evidence, and the heart attack guide if that applies to you.
Prices are as listed in the seller's materials; confirm at checkout.
Prices as listed on the seller’s order page, October 19, 2026; confirm at checkout. The 2-bottle kit is $158 plus $9.99 shipping. Check your medicines with your doctor first. 60-day money-back guarantee (seller’s terms).
Melonex is a dietary supplement, not a treatment. Ask your doctor or pharmacist first if you take a nitrate for chest pain, an erectile-dysfunction drug such as sildenafil, any blood pressure medicine, a potassium-sparing diuretic, a blood thinner or a diabetes medicine, or if you have had a heart attack. Arginine and citrulline can push blood pressure down further. Keep taking prescribed medicine. See side effects and interactions.
No. 06FAQ
Melonex questions people ask
Who wrote the arginine blood pressure meta-analysis?
Dong and colleagues published it in 2011. It pooled 11 randomized trials with 387 participants. We read the abstract, and we cannot vouch for details beyond what it states.
How big was the drop in blood pressure in the arginine trials?
On average, systolic pressure was 5.39 mm Hg lower and diastolic 2.66 mm Hg lower than with placebo. These are group averages from doses of 4 to 24 grams, so they do not predict one person's result.
Does the meta-analysis apply to Melonex?
Not directly. The trials used grams of oral arginine, while a Melonex capsule holds a 500 mg blend with citrulline and two arginine forms. No trial tested the capsule, so the results cannot be borrowed for it.
No. 07Who wrote this
Written and reviewed by
Pages built from the bottle label, the seller’s order page and linked NIH, FDA, CDC, AHA, FTC and peer-reviewed sources.
Last updated . Learn about our editorial standards and how we check reviews. This website is run by Melonexcare, which describes itself as an authorized American Melonex outlet. It is not the manufacturer or the label’s distributor. Buying through our order links earns us money.
Related
More from the Melonex blog
Keep reading
More about Melonex
Authorized American Melonex outlet
Ready to start Melonex?
Bring the label to your doctor or pharmacist first, then choose a pack. Six bottles cost the least per bottle, and the seller lists a 60-day money-back guarantee on every kit.
- Secure checkout
- 60-day money-back
- Ships from the U.S.