This is yet another nail product that purports numerous benefits to nails yet contains really well-known toxic chemicals: dibutyl phthalate, acrylate copolymer, acetyl triethyl citrate, and ethyl acetate. Considering the number of mid to high level toxic ingredients, it's nothing short of outrageous that "Naturale" is in the product name! IMO, these toxic ingredients just have no place in cosmetics.
Why do companies feel the need to put these types of chemicals in their formulations and then tout supposedly therapeutic, healing, nourishing, restorative, regenerative etc. benefits?
The horsetail is the main active ingredient, and it's a good one and well-known for hair and nails, but the nasty ingredients outweigh any benefits. You're really better off just taking a horsetail supplement, or one with silica since that's the key component of horsetail.
And I'm not sure I believe the claims of the other poster after looking at the photo, simply because it takes, on average, 3 to 6 months to grow out nails, not a couple of weeks. You don't get a full set of long, strong nails after two weeks of using *any* product, when nails only grow about 3 mm (0.12 in) a month.