From birth to old age, your immune system is your most loyal ally. In infancy, maternal antibodies offer early protection, but over time, your own immunity takes charge. It evolves throughout life, adapting to new environments and pathogens. While youthful immunity fights infections vigorously, older immune systems require more care. By nurturing it with healthy habits—like balanced nutrition, exercise, and stress management—you ensure it remains a dependable partner throughout your life.  Build Immunity naturally with Yakult.