Delia Effect in 12 Days Vitamin Power Regeneration for nails is the perfect treatment to strengthen and rejuvenate your nails. Enriched with vitamins, this product promotes nail growth, helping to repair weak and brittle nails. It provides essential nourishment, making your nails stronger and more flexible, while visibly improving their appearance. Results can be seen in just 12 days, leaving your nails healthier and shinier.