Biotebal Strong Nails strengthening serum is a preparation that helps to restore the optimal level of hydration to the nails, which translates into their better condition. The cosmetic is perfect for the care of nails that are weak, damaged, dry, break and split. It can also be used to regenerate nails, e.g. after removing hybrids. Thanks to the deeply moisturizing Hydro-Strong formula, the serum has a triple effect - it strengthens and rebuilds nails, prevents them from splitting and breaking, and also accelerates their growth, and protects nails from the harmful effects of external factors. The Hydro-Strong formula contains hydroxypropyl chitosan (HPCH), which protects the nail plate against moisture loss and external factors, at the same time helping to maintain an appropriate level of hydration (closely adheres to keratin, creates an invisible protective layer). In addition, the formula contains horsetail extract, which nourishes and rebuilds nails (contains silica, which binds to keratin, i.e. the nail's building material), dimethyl sulfone, which strengthens the keratin layer, which ensures elasticity and hardness of the nail, and biotin. The preparation is quickly absorbed, penetrates deep into the nail, which strengthens its structure, promotes reconstruction and supports growth.