Description
NOW Sports Arginine and Citrulline 500 mg / 250 mg – 120 Veg Capsules: A Complete 22-Section Guide
Quick answer:
NOW Sports Arginine and Citrulline is a US-made supplement in which each veg capsule provides 500 mg of L-arginine and 250 mg of L-citrulline in free form. The two amino acids take part in protein metabolism, muscle maintenance and the production of nitric oxide, which is linked to blood flow. The label directs 1 capsule twice daily, so the 120-capsule bottle lasts two months. Anyone taking blood pressure medicines, nitrates or heart medicines should check with a doctor first.
Key Facts About Arginine and Citrulline
| Name | NOW Sports Arginine & Citrulline 500 mg / 250 mg – 120 Veg Capsules |
| Brand | NOW Foods – Illinois, USA |
| L-Arginine (free form) | 500 mg per capsule |
| L-Citrulline (free form) | 250 mg per capsule |
| Other ingredients | Hypromellose (cellulose capsule), stearic acid (vegetable source), silicon dioxide |
| Pack size | 120 veg capsules (2-month supply) |
| Label directions | 1 capsule 2 times daily |
| Features | Vegan, keto friendly, halal, kosher, Non-GMO; made without gluten, soy or dairy |
| UPC | 733739000378 |
| Expiry | Printed on the pack |
Short description: NOW Arginine and Citrulline pairs two complementary amino acids – arginine, plus citrulline that the body converts into arginine – to support protein metabolism and muscle maintenance in one veg capsule taken twice a day.
On this page
- Introduction
- What is NOW Arginine and Citrulline?
- How each ingredient works
- Key benefits
- Real-life use cases
- Who is it for?
- Who should avoid it?
- How to use
- Best time to take it
- When will you see results?
- Common mistakes
- Myths and facts
- Side effects
- Drug interactions
- Warnings
- Useful checks
- What to pair it with
- Product comparison
- When to see a doctor
- NSL expert tip
- FAQ
- Conclusion
Introduction to Arginine and Citrulline
Many athletes and fitness fans look for supplements that support muscles and blood flow during training, and arginine and citrulline are near the top of the list. Arginine is used to make nitric oxide, which helps blood vessels relax, and citrulline is converted into arginine inside the body.
NOW Sports combines both in one capsule. This guide explains what you can realistically expect from NOW Arginine and Citrulline, and who needs to be careful.
What Is NOW Arginine and Citrulline?
It is a dietary supplement from the NOW Sports nutrition line, providing 500 mg of L-arginine and 250 mg of L-citrulline per capsule in free form, meaning not bound to other salts.
The capsule is fully plant-based, and the product is vegan, keto friendly, halal and kosher certified, made and quality tested in the USA in a GMP facility.
How Each Ingredient Works
- L-Arginine: an amino acid the body uses to make nitric oxide, protein and creatine, and part of the urea cycle that removes ammonia.
- L-Citrulline: an amino acid the kidneys convert into arginine. Studies suggest it raises blood arginine efficiently, because part of oral arginine is broken down before it reaches the bloodstream.
- Together: they supply arginine both directly and through citrulline.
Key Benefits of NOW Arginine and Citrulline
- Supports protein metabolism and utilisation.
- Supports the maintenance of muscle tissue.
- Takes part in nitric oxide production, which is linked to blood flow.
- Supports the urea cycle and the removal of ammonia from protein breakdown.
- A vegan, keto-friendly capsule free from common allergens.
Real-Life Use Cases
Young weightlifter: he takes one capsule in the morning and one before training alongside a protein-rich diet, and reviews how he feels after 4 to 6 weeks.
Man in his forties: interested in energy and circulation, he asked his doctor first because he takes blood pressure medicine; the doctor agreed with blood pressure monitoring.
Vegan athlete: she chooses it because it is fully plant-based and fits her diet.
Who Is Arginine and Citrulline For?
- Adults who exercise and want to support their muscles.
- People following a vegan or keto diet.
- Anyone looking for arginine and citrulline in a single product.
Who Should Avoid It or Ask a Doctor First?
- People taking blood pressure medicines, nitrates such as nitroglycerin, or other heart medicines, as the label warns.
- Anyone who has had a recent heart attack.
- People with recurrent herpes sores, as arginine may help trigger outbreaks.
- People with kidney impairment or glaucoma.
- Pregnant or breastfeeding women and children – the product is for adults only.
How to Use NOW Arginine and Citrulline
- Label directions: 1 capsule 2 times daily.
- Take it with a full glass of water, and with food if your stomach is sensitive.
- Do not exceed the stated dose without advice.
- Use it consistently for 4 to 8 weeks before judging the result.
Best Time to Take It
Many people take one capsule in the morning and the other 30 to 60 minutes before training. On rest days you can split them between morning and evening. Taking it every day matters most.
When Will You See Results?
- How training feels: varies from person to person and may not be noticeable at usual doses.
- Muscle support: depends mainly on training and enough protein; the supplement helps.
- Review: after 4 to 8 weeks of regular use.
Common Mistakes With Arginine and Citrulline
- Combining it with erectile dysfunction medicines or nitrates without advice.
- Expecting quick results without proper training and nutrition.
- Doubling the dose in the belief that more is better.
- Ignoring low blood pressure or dizziness.
- Using it during an active herpes outbreak.
Myths and Facts
| Myth | Fact |
|---|---|
| Arginine builds muscle on its own. | Muscle growth depends on training and enough protein; the supplement only helps. |
| Citrulline adds nothing to arginine. | Citrulline is converted into arginine and raises blood levels efficiently. |
| Natural supplements are safe with any medicine. | Arginine can interact with blood pressure medicines, nitrates and ED medicines. |
| A higher dose is always better. | High doses increase stomach upset and the risk of low blood pressure. |
Side Effects
Most healthy adults tolerate NOW Arginine and Citrulline well at the stated dose. Possible effects include:
- Bloating, nausea or mild diarrhoea.
- A slight drop in blood pressure or dizziness in some people.
- Herpes flare-ups in people who are prone to them.
Drug Interactions
- Blood pressure medicines: may increase the drop in blood pressure.
- Nitrates such as nitroglycerin: risk of a severe fall in blood pressure.
- ED medicines such as sildenafil and tadalafil: blood pressure lowering may be amplified.
- Other heart medicines and potassium-sparing diuretics: ask your doctor.
- Diabetes medicines: arginine may affect blood sugar in some people, so monitor your readings.
Warnings
- For adults only.
- Consult a physician if pregnant or nursing, taking medication (especially antihypertensives, nitrates or other heart medications), or if you have a medical condition (especially herpes, kidney impairment or glaucoma).
- Store in a cool, dry, dark place after opening and keep out of the reach of children.
- Natural colour variation may occur.
Useful Checks
- Blood pressure: especially if you take blood pressure medicine.
- Kidney function: if you have kidney problems.
- Blood sugar: for people with diabetes.
What to Pair It With
- Enough protein: from food or protein supplements.
- Creatine: for strength training.
- Plenty of water: before and during exercise.
- Foods rich in natural nitrates: such as beetroot and leafy greens.
Product Comparison
| Product | Key feature |
|---|---|
| NOW Arginine and Citrulline | Both amino acids: 1,000 mg arginine and 500 mg citrulline a day |
| NOW L-Arginine 1000 mg | Arginine only, at a higher dose per tablet |
When to See a Doctor
- Before starting if you take blood pressure, heart or ED medicines.
- If you have had a recent heart attack.
- If you feel very dizzy or faint.
- If you have kidney disease or glaucoma.
- If you are pregnant or breastfeeding.
NSL Expert Tip
From the No Style Like pharmacy team: NOW Arginine and Citrulline is a good choice if you want both amino acids in one vegan capsule. Our advice: start with the label dose of one capsule twice a day, combine it with regular training and enough protein, and never combine it with blood pressure medicines, nitrates or ED medicines without your doctor’s approval.
NOW Arginine and Citrulline FAQ
How long does one bottle last?
120 capsules last two months at two capsules a day.
Is it suitable for vegans?
Yes. The capsule is plant-based and the product is certified vegan and halal.
Does it raise blood pressure?
No – it may lower it slightly in some people, which is why those on blood pressure medicines should ask their doctor.
Should I take it before training?
Many people take one of the two capsules 30 to 60 minutes before training.
Does it help erectile dysfunction?
There are small studies on arginine and citrulline at various doses, but it is not a treatment for ED; that assessment belongs with your doctor.
What is the expiry date?
The expiry date is printed on the pack.
Conclusion
NOW Sports Arginine and Citrulline is a vegan formula combining 500 mg of arginine and 250 mg of citrulline to support protein metabolism and muscle maintenance, taken as one capsule twice a day from a bottle that lasts two months. Use it consistently with training, and with care alongside blood pressure and heart medicines. Order NOW Arginine and Citrulline today from No Style Like pharmacy with delivery across Egypt.
Reviewed by the No Style Like pharmacy content team. This information is for education only.
This product is a dietary supplement, not a medicine, and is not intended to diagnose or treat any disease. It does not replace advice from your doctor. Learn more at MedlinePlus – L-Arginine.
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