by staying in rhythm. and to keep up this pace, i drink boost optimum. boost optimum with 5 in 1 advanced nutrition helps support muscle, energy, bone, normal immune function, and vision. boost optimum. be up for life. add the activia 2 week probiotic challenge to your healthy routine and see how activia yogurt with its billions of live and active probiotics may help support your digestive health so you can take on your day. start the activia probiotic challenge today. it works or it's free! ibut it doesn't always come naturally. this i can do, easily. benefiber® healthy shape is a 100% natural prebiotic fiber that's clinically proven to help me feel fuller longer. benefiber® healthy shape. this i can do!