A few of them do, and for good reason. Products that contain water-based ingredients (lotion and creams, liquid hand soap, and facial toner are good examples) may grow bacteria, mold and yeast without a preservative to provide stability. Even if you cannot see mold growing with the naked eye, it most certainly can still be there if not properly preserved. We believe your skincare goods should both be comprised of high quality ingredients andbe completely safe and stable to use. Moss & Brooke products that use preservatives are all paraben-free. Oil based and anhydrous products (like balms, oil perfumes, solid perfumes and body oil), bar soap and alcohol based perfumes do not require preservatives, and do not use them.