Herbal teas that contain chamomile, spearmint, lemon grass, and other herbs and flowers are generally considered to be safe options for children and adults who want to relax. They’re often recommended as a way to encourage rest and sleep. These teas may be best used before bedtime.
Ginkgo biloba has long been recommended for improving memory and increasing mental sharpness. Study results on the use of ginkgo in ADHD are mixed.
A 2014 study, for example, found that symptoms improved for people with ADHD who took a ginkgo extract. Children who took 240 mg of Ginkgo biloba extract daily for three to five weeks showed a reduction in ADHD symptoms with few negative side effects.
Another study from 2010 found slightly different results. Participants took either a dose of ginkgo or methylphenidate (Ritalin) for six weeks. Both groups experienced improvements, but Ritalin was more effective. Still, this study also showed potential benefits from ginkgo.