Those who supplemented with Probiotical’s Bifizen had improved moods sustained through a washout period, as well as increases in circulating serotonin.
The prebiotic fiber received approval for eight claims in total, and unrestricted use in dietary supplements regulated by the Therapeutic Goods Administration.
Supplementation with a strain called L. plantarum HEAL9 by Probi resulted in improved test performance in 129 healthy individuals with self-reported stress.