Bottom line: If you have kidney disease or have been advised to follow a potassium-restricted diet, ask your healthcare professional how much cucumber is appropriate for you.
2. People Taking Warfarin or Certain Blood-Thinning Medication
Cucumbers contain vitamin K, a nutrient that plays an important role in normal blood clotting. A 100-gram serving of raw cucumber with the peel provides about 16.4 micrograms of vitamin K.
This becomes particularly important for people taking warfarin, a commonly prescribed anticoagulant.
The important point is often misunderstood: people taking warfarin do not necessarily need to completely avoid cucumbers or other foods containing vitamin K. Instead, maintaining a consistent intake of vitamin K is generally more important than suddenly eating large amounts or eliminating it completely. Major changes in vitamin K intake can affect how warfarin works.