Muscle twitching is caused by minor muscle contractions in the area, or uncontrollable twitching of a muscle group that is served by a single motor nerve fiber. Muscle twitches are minor and often go unnoticed. Some are common and normal. Others are signs of a nervous system disorder.
Yerba mate has a slight astringent bitter taste due to the high tannin content of the leaves. Researchers have found that leaves from younger plants possess more tannins than leaves from older, more mature trees.
Tasting the Yerba Mate Dust. One way to begin getting a feel for the true tastes of mate is to try some of the powder in the bag, allowing you to experience the raw characteristics of the herb. Rub the dust around your mouth and determine the strength of the mate.