--- product_id: 2588276 title: "Sports, Arginine & Citrulline 500 mg/ 250 mg, Amino Acids, 120 Veg Caps" brand: "now" price: "$35.50" currency: USD in_stock: true reviews_count: 13 category: "Now" url: https://www.desertcart.us/products/2588276-sports-arginine-and-citrulline-500-mg-250-mg-amino-acids store_origin: US region: United States of America --- # Pre-Workout Energy Boost 750 mg Amino Acids Blend GMP Certified Purity Sports, Arginine & Citrulline 500 mg/ 250 mg, Amino Acids, 120 Veg Caps **Brand:** now **Price:** $35.50 **Availability:** ✅ In Stock ## Summary > 💥 Elevate your muscle game with science-backed amino power! ## Quick Answers - **What is this?** Sports, Arginine & Citrulline 500 mg/ 250 mg, Amino Acids, 120 Veg Caps by now - **How much does it cost?** $35.50 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/2588276-sports-arginine-and-citrulline-500-mg-250-mg-amino-acids) ## Best For - now enthusiasts ## Why This Product - Trusted now brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted GMP Quality:** NPA A-rated GMP certification ensures purity, potency, and lab-tested reliability. - • **Clean & Conscious Formula:** Vegan, non-GMO, allergen-free (corn, dairy, soy, nuts) for mindful supplementation. - • **Power-Packed Amino Fusion:** 500 mg Arginine + 250 mg Citrulline for optimized protein metabolism and muscle maintenance. - • **Pre-Workout Performance Catalyst:** Take up to twice daily to amplify nitric oxide production and elevate workout intensity. - • **120 Veg Capsules for Long-Term Gains:** Sustain your fitness journey with a 2-month supply of easy-to-swallow, unflavored capsules. ## Overview NOW Sports Arginine & Citrulline delivers a potent 750 mg amino acid blend per capsule, designed to support protein metabolism, muscle maintenance, and nitric oxide production. With GMP-certified purity and a clean, vegan-friendly formula, this supplement is tailored for proactive professionals seeking enhanced workout performance and sustained energy. Each bottle contains 120 easy-to-swallow capsules, ensuring a reliable, long-term boost to your fitness regimen. ## Description Product Description Protein Metabolism* Muscle Maintenance* Arginine and citrulline are two amino acids that are integral to protein metabolism and utilization, as well as to the maintenance of muscle tissue.* Both are key intermediates in the urea cycle, where they participate in the detoxification of ammonia via the production of urea.* In addition, any arginine not converted to urea enters general circulation where it is distributed to various tissues and metabolized for other uses such as protein synthesis.* Natural color variation may occur in this product. Brand Story By NOW Foods Review: 👍 - Great Review: Effective supplement - I have been taking this supplement for about two months now. I feel more alert and focused. My energy levels have improved as well. The pill size is not too large. I would say that it is medium sized. They are easy to swallow, and there is no taste at all. ## Features - NOW Sports products are comprehensively tested so you can trust that our products are pure and effective for every level of athletics - PROTEIN METABOLISM*: Arginine and citrulline are two amino acids that are integral to protein metabolism and utilization, as well as to the maintenance of muscle tissue* - NITRIC OXIDE PRECUSOR*/PRE-WORKOUT SUPPLEMENT: Take one capsule up to twice a day, preferably before working out - GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation) - Founded in 1968 by Elwood Richard, NOW is one of the largest independent, family- and employee-owned manufacturers of natural products ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002609QQG | | Age Range Description | Adult | | Allergen Information | Corn-Free, Dairy Free, Egg Free, Non-GMO, Nut Free, Soy Free | | Best Sellers Rank | #35,059 in Health & Household ( See Top 100 in Health & Household ) #31 in L-Arginine Nutritional Supplements #2,386 in Sales & Deals | | Brand | NOW | | Brand Name | NOW | | Color | Off White | | Container Type | Bottle | | Customer Reviews | 4.5 out of 5 stars 3,703 Reviews | | Diet Type | Kosher, Vegan, Vegetarian | | Dosage Form | Capsule | | Flavor | Unflavored | | Global Trade Identification Number | 00733739000378 | | Item Dimensions | 2.7 x 2.7 x 4.75 inches | | Item Form | Capsule | | Item Nype Name | Diet & Weight Management | | Item Weight | 5.6 ounces | | Manufacturer | NOW | | Manufacturer Part Number | 37 | | Material Features | Natural | | Model Name | Arginine & Citrulline 500 mg/ 250 mg, Amino Acids | | Model Number | 0037 | | Number of Items | 1 | | Primary Supplement Type | protein | | Product Benefits | Muscle Growth | | Recommended Uses For Product | Amino Acid | | Specific Uses For Product | Amino Acid | | Total Servings Per Container | 120 | | UPC | 733739000378 | | Unit Count | 120 Count | ## Product Details - **Age Range (Description):** Adult - **Brand:** NOW - **Diet Type:** Kosher, Vegan, Vegetarian - **Flavor:** Unflavored - **Item Form:** Capsule - **Item Weight:** 5.6 ounces - **Item dimensions L x W x H:** 2.7 x 2.7 x 4.75 inches - **Primary Supplement Type:** protein - **Product Benefits:** Muscle Growth - **Unit Count:** 120 Count ## Images ![Sports, Arginine & Citrulline 500 mg/ 250 mg, Amino Acids, 120 Veg Caps - Image 1](https://m.media-amazon.com/images/I/718zH+AHuHL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Is it vegan?** A: I just spoke with their nutrition department at the manufacturing plant in Bloomingdale, IL, and the arginine is derived from feathers and is thus NOT vegan. I am bummed as I had been using this product for some time now. Ajimoto/Ajipure pharmaceutical-grade amino acids are however vegan. Hope this helps someone. **Q: Does this product conflict with Lisinopril?** A: Not sure but I did read something. I think it was on webmd. **Q: What does free form L Arginine and L citrulline mean?** A: Free-form amino acids refer to single amino acids that are already in a pre-digested form and ready to be used by your body. Some nutritional products, especially amino acid blends, contain whole proteins and large peptides (chains of amino acids), which the body must first break down into smaller peptides and individual amino acids before use. For faster utilization and better bioavailability, look for free-form amino acids. **Q: What is the prop 65 warning about ?** A: The California Prop 65 warning may inadvertently appear on the product page. This warning does not apply to this product and can be ignored, it is no longer live on this product page upon checking. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 👍 *by S***I on August 17, 2026* Great ### ⭐⭐⭐⭐⭐ Effective supplement *by L***. on July 5, 2026* I have been taking this supplement for about two months now. I feel more alert and focused. My energy levels have improved as well. The pill size is not too large. I would say that it is medium sized. They are easy to swallow, and there is no taste at all. ### ⭐⭐⭐⭐ No Biochemist but I'll reorder this *by R***D on September 3, 2013* I'm no supplement expert, but I know that a good bit of the industry as a whole does little to warrant the price tag. I'm also no athlete and its a effort on my part to get in my 4 workouts per week. I had lost vigor in my workouts and recovery was taking longer from them where the soreness would linger longer than what I was used to. I already used a quality protein mix so I ruled that out as a possible culprit, and then to top it off, sex had become "ok". A visit to my Dr came up with nothing to worry about, so I lurked on some body builder forums and found some suggestions for people who had similar complaints and took note of a couple recurring supplement suggestions. I started off with Arginine and Citrulline and gave it a good 30 days use before posting a review. I can't give the hard core types detailed results to judge buying, but what I can say is that lingering soreness faded after around 2 weeks, to a level a little better than before, I actually got stronger and was able to maintain vigor with my workouts from start to finish, and sex got a serious charge again. That may be due to exercise being back to my pre-slump levels, but either way what I cherished was the vigor and recovery gains I got since starting to use this and it'll stay a staple of the smallish supplement rack I keep. ## Frequently Bought Together - NOW Sports Nutrition, Arginine & Citrulline 500 mg/ 250 mg, Amino Acids, 120 Veg Capsules - NOW Foods Sports Nutrition, ZMA (Zinc, Magnesium and Vitamin B-6), Enhanced Absorption, Sports Recovery*, 180 Capsules --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/2588276-sports-arginine-and-citrulline-500-mg-250-mg-amino-acids](https://www.desertcart.us/products/2588276-sports-arginine-and-citrulline-500-mg-250-mg-amino-acids) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-14*