Allergy Research Group Seratonin 90cAllergy Research Group Seratonin is a dietary supplement for stress and sleep support. Seratonin provides support for the production of neurotransmitters like serotonin that cause nerve impulses to slow down. This can lead to a reduction in mild anxiousness. Serotonin is also involved in the circadian rhythm and a lack of it may affect your ability to fall asleep or stay asleep, resulting in insufficient rest.