The most common cultivar of pumpkin grown specifically for its seeds is the Styrian pumpkin, which yields the small, smooth green seeds sold in grocery stores. Styrian pumpkin seeds are ideal for eating because they are rich in oil and naturally hull-less.
Carbamide peroxide (also known as urea peroxide) is the most popular over-the-counter and professional bleaching agent used for teeth whitening. The main and active ingredient in carbamide peroxide is hydrogen peroxide.arbamide peroxide (also known as urea peroxide) is the most popular over-the-counter and professional bleaching agent used for teeth whitening. The main and active ingredient in carbamide peroxide is hydrogen peroxide.
The Difference Between Carbamide & Hydrogen Peroxide Bleaching Gels. All bleaching products must contain some form of oxidizing agent if they are at all to whiten teeth by splitting up large chromophore molecules into smaller less colored molecules. In tooth whitening gels offered by your dentist, there are only two types of bleaching agents, carbamide peroxide and hydrogen peroxide.