News This Morning viewers learned that supplements, including Suntheanine, can give them a head start on their spring health reboot. “What’s important about the supplement, available in both capsule and chewable form, is that you can get a concentrated dosage so you know exactly what you’re getting,” said registered dietician Dr. Felicia Stoler, who loves supplements that multi-task. Suntheanine, a patented form of the amino acid L-theanine, “provides us with the ability to remain focused, sharp and calm.” L-theanine in supplement form also helps improve the quality of sleep, according to Stoler.