NOW Sports L-Citrulline 750 mg Review

NOW Foods L-Citrulline 750 mg is offered as 90 vegetarian capsules and is presented on this page as a product that supports protein metabolism. The page explains that citrulline is a non-essential amino acid and an important intermediate in the urea cycle, where it works along with other amino acids to remove ammonia, a byproduct of protein metabolism. The page also states that citrulline plays an important role in the healing process and in the maintenance of a healthy immune system. The product is listed with a SKU of 0083 and a UPC of 733739000835. Each serving is two veg capsules, and the container holds 45 servings. Each serving provides 1.5 grams, or 1,500 mg, of L-citrulline and 5 calories. The page notes that the daily value has not been established for citrulline. The suggested use is to take one to two capsules, one to two times daily, between meals. The capsules are made from hypromellose, with stearic acid from a vegetable source and silicon dioxide as the other ingredients. The product is marked halal, kosher under the Triangle K symbol, non-GMO and vegan. The label states that it is not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients, although it is produced in a GMP facility that processes other ingredients containing these allergens. The page says the product is made and quality tested in the USA with globally sourced ingredients. It also describes the company as family owned since 1968 and says the bottle is made from 100 percent post-consumer recycled resin. Natural color variation may occur in the product. Storage instructions advise keeping it in a cool, dry place after opening. The caution section says the product is for adults only and advises consulting a physician if pregnant or nursing, taking medication, especially meds, nitrates or other vasodilating drugs, or having a medical condition, especially abnormal blood pressure. The page includes the standard statement that these claims have not been evaluated by the Food and Drug Administration and that the product is not intended to diagnose, treat, cure or prevent any disease. The current price shown is a special price of $22.39, down from a regular price of $27.99, which is a 20 percent discount. The item is listed as in stock for shipping and available for same day delivery and store pickup depending on location.

Product Focus: CirculationAlso covers:HeartRanked among:Nitric oxide supplements
Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions
Cost per month
$15

Study, Trial or Testing Result Summary

MembersHuman studies

1 of these 30 human studies gave citrulline by drip, not by mouth.

Citrulline is the only active ingredient, at 1.5 grams per two-capsule serving, or 3 grams a day, which is a dose. A review pooling 8 randomized trials in 176 middle-aged and older adults found citrulline blood vessel widening but overall arterial stiffness, though it one arm-to-ankle stiffness measure. …

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Review Totals and Summary

Members6,933 reviews
6,933 reviews · Iherb 4,388 · Covenanthealthproducts 2,497 · Swanson Vitamins 27 · Target 19 · Amazon 1 · Fruitfulyield 1

Customers have shared their experiences with NOW Sports L-Citrulline 750 mg capsules, which have accumulated about 28 ratings across various stores. Half of these ratings are , scoring 4 or 5 stars, indicating a but generally favorable reception for the product. **What Buyers Say It Did For Them** users report from taking these L-Citrulline capsules. …

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Biohacker Summary

MembersWhat our biohacker panel says

Citrulline is the main ingredient, and the panel leans toward it: five of the nine who spoke are latest on , three are , and one . They take it mainly to nitric oxide and blood flow, for workout pumps, endurance, fatigue, and recovery, and a also mention sexual performance or heart . …

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RAL Summary

MembersThe tier and why

Its reviews are set aside, so it is graded on its studies alone. Human studies support Citrulline (17 of 30 human studies showed an ), but there are yet reviews to confirm it (0). …

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Cardiovascular system. Combine with and possible side are for members.

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Supplement Facts

L-Citrulline 1.5 g · L-Citrulline 1500 mg
Supplement Facts
Serving Size 2 Veg Capsules
Servings Per Container 45
Amount Per Serving% Daily Value
Calories5
L-Citrulline1.5 g†
L-Citrulline1,500 mg†
† Daily Value not established.

Other ingredients: Hypromellose (cellulose capsule), stearic acid (vegetable source) and silicon dioxide. Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Directions: Take 1-2 capsules 1 to 2 times daily between meals.

Label source: Vitacost · Report a label change

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Graded October 26, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.