Seredyn is an herbal remedy approach to brain nutrition. The company behind this formula is BioNeurix. Seredyn for anxiety is what most customers expect from this formula which contains several well known ingredients, such as L-theanine, Passion Flower or Valerian root extract. L-theanine was added because it is capable of crossing the blood brain barrier and deliver the essential nutrients directly into the brain. Valerian root was added due to its calming properties. Seredyn side effects include headache, stomach upset, fatigue, drowsiness and others. The supplement is a more direct approach to brain nutrition that uses well known and well researched ingredients to deliver the promised results. Seredyn reviews from consumers are mixed with some reporting no effects whatsoever.