Polydeoxyribonucleotide (PDRN) is a pure DNA segment extracted from salmonid sea trout. It is a tissue regeneration material that has outstanding effectiveness in easing inflammation and restoration of the skin, ligaments, and tendons in your body. It is most similar to the DNA of the human placenta, so it is extremely safe having no human immune reaction. PDRN is selectively used for high-end cosmetics and medical treatments