Health from Watercress Phytochemical Content

Check out the Ai reference at the bottom of this post.

I CAN’T SAY IT BETTER THAN Ai CAN - - - information listed is from Ai

A one-cup (about 34-gram) serving of chopped, fresh watercress contains: 

  • Calories: 3.7

  • Carbohydrates: 0.44 grams

  • Protein: 0.78 grams

  • Fat: 0.03 grams

  • Fiber: 0.17 grams 

Key vitamins and minerals

Watercress is an excellent source of several vitamins and minerals, notably vitamins K, C, and A. 

Vitamin K

  • A single cup provides more than 100% of the daily recommended intake.

  • It is vital for blood clotting and is crucial for bone health and strength. 

Vitamin C

  • A cup delivers about 24% of the daily value.

  • This antioxidant is essential for immune function, collagen production, iron absorption, and wound healing. 

Vitamin A

  • A cup contains roughly 22% of the daily value.

  • It is crucial for maintaining vision and immune health. 

Antioxidants and other beneficial compounds

  • Powerful antioxidants: Watercress contains antioxidants that combat inflammation and cell damage from free radicals, which can help lower the risk of chronic diseases like heart disease, diabetes, and cancer.

  • Carotenoids: It is a rich source of lutein and zeaxanthin, which are vital for eye health.

  • Glucosinolates: These compounds have been studied for their potential anticancer effects.

  • Calcium and magnesium: These minerals help regulate blood pressure and are essential for bone health.

  • Omega-3 fatty acids: Watercress contains alpha-linolenic acid (ALA), a type of omega-3 fat that is beneficial for heart health. 

Health benefits

Thanks to its nutritional profile, watercress offers several health benefits: 

  • Supports heart health: The antioxidants and minerals like calcium, magnesium, and potassium help reduce blood pressure and lower cholesterol.

  • Strengthens bones: Its high vitamin K, calcium, and magnesium content contributes to stronger bones and can help prevent osteoporosis.

  • Reduces cancer risk: Studies suggest that compounds like glucosinolates may help fight cancer.

  • Supports vision: The high levels of lutein and zeaxanthin can help lower the risk of age-related macular degeneration.

  • Aids in weight management: As a low-calorie, high-nutrient food, watercress can be a valuable addition to a diet aimed at weight loss or management

    ________________________________________________________________

    One NIH Study Resource

  • Watercress (Nasturtium officinale) as a Functional Food for Non-Communicable Diseases Prevention and Management: A Narrative Review

    NIH Study July 15, 2025

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