Notes To Self: L-Arginine & L-Citrulline

I've been doing some research into the components of GNC's Force Factor supplement and the primary way that this product works is by increasing blood flow using L-Arginine and L-Citrulline. Using food to get these in my diet would involve eating about 6 cups of Watermelon cubes (rind included) at 66 grams of carbs and eating 1/2 can (5 ounces) of black beans at about 57 net carbs. Lean chicken breast (about 15 ounces) and canned white tuna (about 2 cans) are also good sources of L-Arginine. Peanuts too, but the calories of how many I'd need are just unreasonable (as is cow's Milk). My Whey Isolate powder already offers some L-Arginine too. Luckily I already eat chicken breast and tuna in my regular regimen. But considering my goals, it may be something to keep in mind as far as being sure I'm getting at least half the desired dose of these elements in my diet.