Sustained plus Immediate Release L-Arginine contains this conditionally essential amino acid in a bilayer tablet, with two tablets providing 500 mg of sustained release and 500 mg of immediate release L-arginine in a formula that allows for enhanced blood levels of this nutrient. Most supplemental L-arginine is quickly absorbed into circulation and is extremely efficiently metabolized, yielding only a short-lived boost to L-arginine levels. Sustained plus Immediate Release L-Arginine tablets are specifically manufactured to immediately increase blood levels of L-arginine and then to sustain this beneficial increase continuously over an 8-hour period.*

L-arginine has been shown to support the cardiovascular system, promote vigorous heart function and enhance healthy circulation throughout the body through its conversion to nitric oxide.* Research suggests L-arginine supplementation may also have positive benefits on athletic performance.*

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645-0034 Doctor's Best L-Arginine, Sustained + Immediate Release, 500mg 120 tablets Nutrition Facts Serving Size: 2 Tablets Servings Per Container: 60 Amount Per Serving % Daily Value* L-Arginine (as 500mg immediate release and 500mg sustained release from L-Arginine alpha-keto-glutarate) 1,000  mg   *Percent Daily Values are based on a 2,000 calorie diet. Suitable for vegetarians. Contains nothing other than listed ingredients.   Other Ingredients: Cellulose, vegetable stearins, magnesium stearate (vegetable source), silicon dioxide. Recommended Use: Take 2 tablets once or twice daily, away from food, or as directed by a nutritionally informed physician. Before beginning any program of weight loss, consult your health care practitioner. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease. If you notice any errors in the information above, please let us know. If you have further questions about this product, please contact Doctor's Best at 1-800-333-6977 The nutrition facts listed above are supplied as a courtesy to our customers. The nutrition facts were current and accurate to the best of our knowledge at the time they were entered. Manufacturers often change formulas or ingredients without notifying us. We do our best to keep them as up to date as possible, however Netrition.com will not be held responsible for any differences between what is listed on our web site and what is listed on the product that you receive. If you need to be 100% certain of the ingredients currently being shipped, we recommend that you call or email our customer service department to check the shelf of current stock.