Taninoplasty is a natural hair treatment that uses tannins, plant compounds, to straighten hair without harsh chemicals like formaldehyde. It provides smooth, long-lasting straightening (3 to 6 months), improves hair health, reduces frizz, and is suitable for all hair types. The process includes shampooing, applying the product, rinsing, and flat ironing. To maintain results, it is recommended to use sulfate- and paraben-free products.