NOW Foods has five nitric oxide related products at Supps247. Arginine and citrulline are amino acids the body uses to make nitric oxide, which relaxes blood vessels. Beetroot supplies nitrates that do the same job by a different path.
At a glance
| Product | Detail |
|---|---|
| L-Arginine 500 mg | 100 veg capsules |
| L-Arginine 1,000 mg Double Strength | 120 tablets |
| L-Citrulline 750 mg | 90 capsules |
| Arginine and Citrulline | Blend of both |
| Beetroot 1,100 mg | 180 capsules |
What to know
Citrulline raises blood arginine more reliably than arginine itself, because much of the arginine you swallow is broken down in the gut and liver. Sports studies mostly use 3 to 6 g of citrulline about an hour before exercise, so capsule serves are on the low side. Beetroot juice is well studied for endurance, but capsules contain far less nitrate than juice.
Who should check first
- Blood pressure medicine, nitrates or erectile dysfunction medicine: do not combine without your doctor's advice.
- After a heart attack: do not take arginine.
- Cold sores or herpes: arginine may trigger outbreaks.
- History of kidney stones: beetroot is high in oxalate.
How to use and where to buy
Follow the label on each product. Shop them online at Supps247 with Australia-wide delivery or click and collect, or browse more from NOW Foods.
Checked against the product listings on 12 November 2026. Always read the label and follow the directions. General information, not medical advice.
