Welcome to Yayashi Probiotics Store! At Yayashi Probiotics, we are committed to transforming your oral care routine with the power of probiotics. Our mission is to provide innovative, science-backed solutions that not only whiten your teeth but also promote long-term oral health. Our flagship product, Yayashi SP4 Probiotics Whitening Toothpaste, is specially designed to remove stubborn yellow stains caused by coffee, tea, and smoking. But we go beyond just whitening—our unique probiotic formula helps maintain a healthy balance of oral bacteria, supporting stronger gums, fresher breath, and overall dental wellness.