how many mg in a l
mg is milligram, a measure of weight. Liter is a measure of volume. A liter of WATER would weigh 1 million milligrams- but a liter of alcohol would weigh about 700,000 mg- since alcohol is lighter than water. A liter of mercury would weigh MUCH more, since it is heavier than water.
In one study, it would appear that using a low dose of L-arginine (500 mg three times daily) was no better than taking a placebo. However, taking 500 mg three times daily was an effective dose in men with low levels of nitric oxide, a substance needed for penile erection.