Extenze Male Enhancement And the normal lead level of thirteen.5 µg also topped the USP restrict of 10 µg per day. The traditional arsenic degree of 12.2 µg used to be approaching the USP limit of 15 µg per day, and the ordinary for mercury used to be zero.7 µg, good beneath the USP's 15 µg-per-day restrict. Three every day servings of Muscle Milk Vanilla Crème contained 12.2 µg of lead, exceeding lead limits, and 11.2 µg of arsenic. A fourth product, Muscle Milk dietary Shake.