Sereniten Plus is a combination of Lactium® casein decapeptide, L-Theanine and Vitamin D to support the Hypothalamic-Pituitary-Adrenal (HPA) axis and feedback loop for metabolic support, stress management and cortisol regulation.† Lactium® and L-Theanine have been shown to provide a calming effect and may support normal sleep that is affected by stress.†