Cucumbers are 95 percent water, keeping the body hydrated while helping the body eliminate toxins. Cucumbers have most of the vitamins the body needs in a single day. Don't forget to leave the skin on because the skin contains a good amount of vitamin C, about 10 percent of the daily-recommended allowance.
Cucumber are known to contain lariciresinol, pinoresinol, and secoisolariciresinol. These three lignans have a strong history of research in connection with reduced risk of several cancer types, including breast cancer, ovarian cancer, uterine cancer and prostate cancer
•Fresh extracts from cucumbers have recently been show to have both antioxidant and anti-inflammatory properties. While research in this area must still be considered preliminary—since it's only been conducted on animals in a lab setting—the findings are clear and consistent. Substances in fresh cucumber extracts help scavenge free radicals, help improve antioxidant status, inhibit the activity of pro-inflammatory enzymes like cyclo-oxygenase 2 (COX-2), and prevent overproduction of nitric oxide in situations where it could pose health risks. It's highly likely that cucumber phytonutrients play a key role in providing these antioxidant and anti-inflammatory benefits, supporting health alongside of the conventional antioxidant nutrients—including vitamin C, beta-carotene, and manganese—of which cucumbers are an important source Reference Reference