![]() While studies have shown an effective dose ranging from 200 to 400 milligrams (mg), Sleep Blackberry Zen contains only 100 mg of L-theanine per serving.Īdditionally, as with other Olly supplements, Sleep Blackberry Zen’s effectiveness has not been studied. It may also improve sleep quality when combined with other ingredients, such as GABA or magnesium ( 24, 25, 26, 27). Some research also suggests that L-theanine may relieve stress, which could help support rest and relaxation. Studies show that melatonin may be quite beneficial for improving sleep quality, especially in people with sleep disorders such as insomnia ( 23). Made with melatonin, L-theanine, and botanicals, Olly’s Sleep Blackberry Zen is designed to promote relaxation and support a healthy sleep cycle.
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