 At week eight, concentrations in hair cortisol were also lower. The study said: Moreover, ocimum tenuiflorum supplementation was associated with a buffered stress responses after exposure to the MAST as demonstrated by significantly lower concentrations in salivary cortisol, salivary amylase, systolic and diastolic blood pressure, and subjective stress ratings. Ocimum tenuiflorum supplementation was well-tolerated with ... Expert recommends holy basil tea to boost sleep and lower stress... 