500 mg L-Arginine & 250 mg L-Ornithine per 2-capsule serving*

NOW Sports Arginine & Ornithine — Review & How to Use for Circulation, Detox & Recovery

The NOW Sports Arginine & Ornithine 250 Veg Capsules aim to support nitric-oxide production, urea metabolism and workout recovery. Here we’ll cover what the formula delivers, when and how users take it, what evidence exists, and whether it fits your regimen.

When You Might Use It

You’re pushing workouts hard, notice sluggish recovery, or want to support circulation and muscle pump. A supplement that provides L-Arginine (precursor to nitric oxide) plus L-Ornithine (involved in the urea cycle) can be appealing. According to the product webpage, this formula “combines two complementary amino acids” that are “popular with athletes and other active individuals.” 

That said, user threads caution: “L-Arginine supplements have very poor bioavailability and do not increase arginine levels substantially.” So setting expectations is key.

Key Benefits

Ingredient Spotlight

*(Based on label: 2 veg capsules = L-Arginine 1 g + L-Ornithine 500 mg) 

What You Might Notice Over Time

• First week: Some users report a subtle increase in “pump” during workouts, better blood-flow sensation or slightly reduced fatigue.
• Weeks 2–4: With consistent use, combined with quality training and nutrition, you may notice improved recovery, fewer muscle soreness days.
• 4+ weeks: Performance benefits plateau unless you adjust dosage or training variables—research suggests higher doses are often needed for robust gains. 

Note: Effects are modest and individual. Supplements don’t replace training, diet or recovery fundamentals.

How to Use NOW Sports Arginine & Ornithine

1. Serving size: 2 veg capsules daily (unless otherwise directed by label). 
2. Timing: Take on an empty stomach before workout or at bedtime—as per label for urea-cycle support.
3. Hydration matters: Amino acids and increased circulation support require adequate water and balanced electrolytes.
4. Stack thoughtfully: If combining with other NO-boosters (beet root, citrulline) or stimulants, monitor tolerance carefully.
5. Medical note: If you have low blood pressure, cardiovascular conditions, or take medications affecting circulation—consult your doctor. 

Pairing & Compatibility

What Users Often Say

“Using 2 of these before bed on empty stomach—noticed better pump during my lifts.”

“Solid quality brand; veg capsules nice but felt mild—maybe need higher dose for big effect.”

Anecdotal reviews reflect moderate positive feedback, with many noting dosage, timing and training context matter a lot.

FAQs — NOW Sports Arginine & Ornithine