L-arginine 500 mg capsules: what L-arginine is, food sources and what to check on the label

By Kraeuterhaus Sanct Bernhard India · Last checked 30 September 2026

L-arginine is an amino acid, one of the building blocks of protein. Your body makes some of it and gets the rest from protein foods such as groundnuts, soy, walnuts, fish and dairy, which is why it is called a conditionally essential amino acid. When you compare L-arginine capsules, check four things on the label: the L-arginine content, the other ingredients (including any added vitamins), the daily dose, and the warning, which for L-arginine products is especially important.

What is L-arginine?

L-arginine is one of the amino acids that make up proteins. Researchers describe it as conditionally essential: besides what we eat, the body produces it from protein turnover and makes it from another amino acid, citrulline. [1] The "L" refers to the form of the amino acid found in proteins.

No Recommended Dietary Allowance has been set for L-arginine. [1] It does not appear in the ICMR-NIN 2020 tables of recommended intakes for Indians, which cover vitamins, minerals, protein and energy. [2]

Which foods contain L-arginine?

Because it is part of protein, L-arginine is found in most protein foods. A population study published in the journal Nutrients names soy protein, peanuts (groundnuts), walnuts and fish as rich sources, and notes that cereals and grains contain lower levels, though they can still supply a large share because we eat a lot of them. [1]

The same study found a mean intake from food of about 4.4 grams a day in its adult participants, similar to the 4.4 grams a day reported for US adults. [1] For vegetarians in India, groundnuts, soy, walnuts, pulses and dairy are everyday sources.

That gives useful perspective. Intake from food is measured in grams per day, while supplement capsules are labelled in milligrams. A capsule adds a small, fixed amount to what you already eat. It is not a substitute for protein foods, and a varied diet with enough protein remains the main source of L-arginine for most people.

How to read an L-arginine capsule label

1. L-arginine content. Look for the amount of L-arginine per capsule in milligrams, or its share of the capsule contents. Our label, for example, states 500 mg L-arginine per capsule.
2. Other ingredients. The ingredient list should name the capsule shell and every filler. The actives should be listed ahead of the additives. [4]
3. Added vitamins. Some products add vitamins. Check exactly which ones appear in the nutrition table, and the amount of each.
4. Daily dose. Check how many capsules make one daily serving, and never take more than the label says.
5. Warning. Read who should not take the product and who should check with a doctor before use. Supplement labels in India must carry warnings, contraindications and published product-drug interactions, as applicable. [4]

The B vitamins in our capsule, compared with ICMR-NIN 2020

L-Arginine Revive Essence contains three B vitamins: vitamin B6, folic acid and vitamin B12. Per capsule, the nutrition table on the jar lists vitamin B6 1 mg, folic acid 100 mcg and vitamin B12 1 mcg. For comparison, the ICMR-NIN 2020 RDAs for men are vitamin B6 2.4 mg, folate 300 µg and vitamin B12 2.2 µg (for women: 1.9 mg, 220 µg and 2.2 µg). [2] So one capsule gives a partial share of each, not a full daily amount.

Vitamin B6 and vitamin B12 may support normal energy-yielding metabolism, and folic acid may support normal amino acid synthesis, as part of a balanced diet.

The label's safety warning: who should not take L-arginine

Read the warning before you buy. This is the safety warning printed on the label of L-Arginine Revive Essence, quoted word for word. It is a warning, not a product claim:

"This product is not suitable for pregnant women, nursing mothers, persons under the age of 18 and persons who have suffered a heart attack. Persons taking medication to thin the blood, to increase potency or medication containing nitrates should consult a doctor before taking this product."

If you take any regular medicine or have a medical condition, show the label to your doctor or pharmacist before you start. NIH's Office of Dietary Supplements also advises getting your doctor's approval before combining supplements with prescribed medicines. [3]

Food comes before the capsule

A capsule does not replace a varied diet. Supplements cannot take the place of the variety of foods that make up a healthy eating routine. [3] If you choose an L-arginine supplement, take it as part of a balanced diet and follow the label dose.

About L-Arginine Revive Essence

L-Arginine Revive Essence is a daily capsule that combines L-arginine with vitamin B6, folic acid and vitamin B12. According to the label, each capsule contains 500 mg L-arginine. Each jar holds 60 capsules, and the daily amount is 2 capsules with sufficient liquid, so one jar lasts a month. The label lists the ingredients as: "L-arginine (77 %), Hydroxypropylmethylcellulose, filler Calcium Carbonate, anti-caking agent Magnesium Stearate, filler Corn Starch, Vitamin B6 Hydrochloride, Folic Acid, Vitamin B12." It is a health supplement, not for medicinal use. It sits in our heart wellness range, and our guide to reading a supplement label explains the rest of the pack.

Frequently asked questions

Is L-arginine an essential amino acid?

It is called conditionally essential: the body makes some L-arginine itself and gets the rest from protein foods. [1]

What foods are high in L-arginine?

Soy protein, peanuts (groundnuts), walnuts and fish are rich sources. Cereals and grains contain less but are eaten in larger amounts. [1]

Which B vitamins are in L-Arginine Revive Essence?

Vitamin B6 (1 mg), folic acid (100 mcg) and vitamin B12 (1 mcg) per capsule, as listed in the nutrition table on the jar.

When should I take L-arginine capsules?

Follow the label. For L-Arginine Revive Essence, take 2 capsules a day with sufficient liquid.

Who should not take L-arginine?

The safety warning on our label states: "This product is not suitable for pregnant women, nursing mothers, persons under the age of 18 and persons who have suffered a heart attack. Persons taking medication to thin the blood, to increase potency or medication containing nitrates should consult a doctor before taking this product."

This article is general information, not medical advice. Our products are health supplements, not medicines, and are not intended to diagnose, treat, cure or prevent any disease. Please read the label before use.

Sources

1. Mirmiran P, Bahadoran Z, Ghasemi A, Azizi F. The Association of Dietary l-Arginine Intake and Serum Nitric Oxide Metabolites in Adults: A Population-Based Study. Nutrients. 2016;8. Open access: PMC4882723. PMC4882723
2. ICMR-National Institute of Nutrition. A Brief Note on Nutrient Requirements for Indians, the Recommended Dietary Allowances (RDA) and the Estimated Average Requirements (EAR), 2020. Tables 3 and 4. nin.res.in (PDF)
3. NIH Office of Dietary Supplements. Dietary Supplements: What You Need to Know (consumer fact sheet, updated 4 January 2023). ods.od.nih.gov
4. Food Safety and Standards Authority of India. FAQs on the Food Safety and Standards (Health Supplements, Nutraceuticals, Food for Special Dietary Use, Food for Special Medical Purpose, Functional Food and Novel Food) Regulations, 2016 (6 October 2020). fssai.gov.in (PDF)

Sources checked on 30 September 2026.