Add to cart MDPA AlphaWave – L-Theanine (120 Capsules) $37.00 — available on subscription Rated 5.00 out of 5 MDPA AlphaWave – L-Theanine (120 Capsules) is a naturally occurring, unique amino acid found in green tea leaves. L-theanine has been found to reduce stress by promoting relaxation without drowsiness.