14 Best Ingredients for Detox Smoothies

2. Cucumber

Cucumber has mild diuretic properties due to its high water and potassium content.

But the claim that it “cleanses the liver” is exaggerated.

As registered dietitian Keri Glassman, RD, notes:

“No single food cleanses your liver. Your liver cleanses itself — nutrients simply support that process.”

Cucumbers contain polyphenols that may reduce oxidative stress, but they don’t remove toxins directly.

Best for: hydration, low-calorie bulk in smoothies, digestive comfort.