Old cucumbers are an excellent source of fiber to stimulate the digestive tract and are a source of iron to build the protein hemoglobin to transport oxygen through the bloodstream. The cucumbers also contain calcium to strengthen bones and teeth, vitamins A and C to reduce inflammation and boost collagen production, and vitamin B6 to ensure a healthy metabolism and central nervous system. In China, Old cucumbers are believed to contain anti-aging properties and are consumed to improve skin complexion.