Benefits
- Increases production of nitric oxide for better blood flow*
- Promotes normal blood vessel function and heart rate*
- Helps maintain blood pressure already within a normal range*
- May improve athletic performance*
- May support male sexual function*
Highlights
- MicroActive® Citrulline (sustained release complex)
- Gradual release into the bloodstream over 10 hours
- Particles reduced to less than 10 microns for better absorption
- Increases blood levels of arginine better than arginine or standard citrulline
- Vegan, gluten-free, GMO-free
How It Works
What do cardiovascular health, athletic performance, and male sexual function have in common? They all depend on healthy circulation! And the key to healthy circulation is healthy blood vessels. Just like water through a garden hose, blood flows best through your blood vessels when they are flexible and relaxed.
Many people reach for arginine supplements because this amino acid boosts production of nitric oxide in the body — and nitric oxide helps relax the blood vessels. But that’s not the best strategy. Why? Because arginine is broken down by the enzyme arginase before it can reach the bloodstream. As a result, barely any arginine you ingest is actually absorbed. That’s where citrulline comes in.
Citrulline helps your body make arginine. Research shows that supplementing with citrulline raises arginine levels 2.3 times more effectively than taking arginine itself. But conventional citrulline products have two problems. First, they contain large citrulline particles that can’t be absorbed completely. Second, their contents are released all at once, so they don’t stay in the bloodstream long.
Luckily, there’s Citrulline-SR from Quality of Life. Citrulline-SR features MicroActive® Citrulline, a special micronized form of citrulline that is better absorbed than regular citrulline. Because it delivers sustained release over 10 hours, Citrulline-SR consistently elevates blood levels of the compound.
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100%
Dairy-Free -
100%
Gluten-Free -
100%
GMO-Free -
Magnesium
Stearate Free -
100%
Vegetarian
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Learn more about
our ingredients
L-citrulline is an amino acid found in many foods, including legumes, milk, fish, and meat. As a precursor to the amino acid L-arginine, it boosts the production of nitric oxide in the body.* Nitric oxide dilates your blood vessels, improving blood flow.* As a result, citrulline has benefits for cardiovascular health, athletic performance, and male sexual function.* Made through a proprietary process, MicroActive® Citrulline is more bioavailable than regular citrulline for two reasons. First, MicroActive® Citrulline has a very small particle size of less than 10 microns, so it can easily pass through the luminal membrane of the small intestine. Second, MicroActive® Citrulline is encased in a special sustained-release matrix that gradually releases the citrulline over 10 hours, allowing it to stay in the bloodstream longer than regular citrulline (20 out of 24 hours at the 2-capsule daily dose).
Click here to view the research abstracts.
100% of our ingredients are backed by human clinical studies.
Click on any of the ingredients below to view the research abstracts.
Suggested Use: 2 vegicaps before a meal
| Serving Size: 2 vegicaps | Servings Per Container: 30 |
| Amount Per Serving | % Daily Value |
|---|---|
| L-Citrulline (from MicroActive® L-Citrulline) |
800 mg † |
| † Daily Value (DV) not established. |
Other ingredients: hypromellose (derived from cellulose)
capsule, carnauba plant wax, organic rice hull concentrate.
MicroActive® is a registered trademark of BioActives LLC.
Dosage Chart
| Ingredient | Daily Dose Used in Human Studies | Daily Dose Used in Citrulline-SR |
|---|---|---|
| MicroActive® L-Citrulline |
800 mg – 8 grams | 800 mg |
Serving size: 2 vegicaps ● Daily dose : 2 vegicaps
Directions for use
| Serving Size: | Daily Dose: | When to Take: | How to Take: |
|---|---|---|---|
| 2 Vegicaps | 2 Vegicaps | Daily | Before meal |
Get More of What You Take Citrulline For
When you take conventional citrulline supplements, your arginine levels peak about 1-2 hours. They cause a small spike and then a rapid decline in blood levels of the compound. But what if your citrulline could be steadily released over 10 hours? It would consistently elevate blood levels of citrulline, providing round-the-clock health benefits.
Citrulline-SR unleashes the true power of citrulline with MicroActive® Citrulline. This special form of citrulline has been micronized for superior absorption and is released slowly over the course of 10 hours, so stays in the bloodstream long enough to exert its benefits.
Trust, Efficacy, and Our Promise
We are the only brand in the supplement industry that can guarantee that every single ingredient in every one of our products is backed by human studies and delivered in doses consistent with clinical research
No exceptions, no compromises.
Satisfaction
Guarantee
You can return items purchased directly from Quality of Life Labs for any reason within 30 days of purchase. See our Returns page for full details.
Protectively
Packaged in the USA
We package almost all of our products in glass bottles with metal lids for one simple reason: Glass and metal do the best job of protecting our supplements from light, oxygen, and moisture — all of which can degrade vitamins, minerals, botanicals, and other nutraceuticals and lessen their potency and freshness.
Dosages
Matter
When you choose Quality of Life, you can trust your supplements to work, because 100 percent of the ingredients in every product we manufacture are provided in dosages that match the clinical research.
Frequently Asked Questions
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How does this differ from other Citrulline products on the market?
Other citrulline products typically face two challenges: large particle size limits absorption, and quick release leads to a short presence in the bloodstream. Citrulline-SR addresses both by reducing particle size for enhanced absorption and providing a gradual ten-hour release, ensuring sustained availability in the bloodstream.
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How long does Citrulline-SR stay in your system?
MicroActive L-Citrulline stays in your bloodstream for 12 hours — 3x longer than regular citrulline.
Customer Reviews
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Quality of Life's Satisfaction Guarantee
You can only return items purchased directly from Quality of Life Labs for any reason within 30 days of purchase. You will receive a full refund for unopened items in the original form of payment and merchandise credit for opened items.
