Natural Factors Magnesium Bisglycinate plus L‑Theanine combines 100 mg of the essential mineral magnesium with 125 mg of the amino acid L‑theanine to temporarily promote relaxation without causing drowsiness. This non-GMO formula features magnesium bisglycinate, which is easy on the stomach and does not rely on stomach acid for absorption. Taken as 1–2 vegetarian capsules per day, this formula works quickly to reduce feelings of occasional stress and provides a source of magnesium to maintain proper muscle function.