Grandpa Stinks Soap is specifically formulated to target Nonenal, the odor compound caused by aging skin. Regular soaps don’t break it down — ours does, using Japanese persimmon extract and green tea oil.

Our soap bars are manufactured at a factory in Asia using traditional manufacturing processes to keep our proprietary blend of persimmons and green tea at the highest efficiency. The soap’s raw ingredients are slowly poured into frames and highly filtered to prevent any impurities from entering the manufacturing process. After cutting the soap into pieces, quality control inspects the entire batch to ensure it meets our standards. We select only high-quality ingredients to ensure maximum performance, and these can often be delicate and expensive. Most importantly, our proprietary deodorizing persimmon and green tea blend is not just regular persimmon you can find anywhere. It is specially formulated for maximum deodorizing results.

Yes. Our formula is gentle, natural, and free from harsh chemicals. It’s designed with mature and sensitive skin in mind and can be used daily without irritation.

Many customers report a noticeable freshness after the first wash, with even better results after consistent daily use for a few days.

Focus on neck, ears, chest, back, and underarms — areas where Nonenal tends to build up. Lather well and rinse thoroughly.

Absolutely. While it’s made for aging skin and odor, anyone looking for a deeper, cleaner wash or dealing with persistent body odor can benefit from it.