Cucumbers are relatively poor in terms of nutrient content, however they are one of only a few foods to contain silicon. Silicon isn�t a very common mineral and some sources state that it is important in connective tissue such as skin, hair and nails. Eating both the skin and seeds will deliver the best nutritional benefits. Cucumbers also contain some vitamin C, pro vitamin A as �-carotene in the skins, fibre through their skin and seeds, and potassium. Lebanese cucumbers have about twice as much vitamin C as other varieties.