Most users start noticing visible whitening within 7–14 days of regular use, depending on coffee, tea, or smoking habits.

Yes ✅, SP-4 is formulated with gentle whitening agents that help remove stains without causing pain or enamel damage.

Yes, the formula targets surface stains caused by coffee, tea, wine, and smoking, helping restore your natural white smile.

Unlike normal toothpaste, SP-4 uses advanced stain-removal and whitening technology to brighten teeth while still protecting gum and enamel health.

Yes! We provide FREE shipping (4–6 days) and a 5-day hassle-free return policy, so you can try it risk-free.