Learn about red onion water, a traditional drink, how to make it, nutrition facts, and what to know before trying it.

Red onion water has become a popular homemade drink on social media, with many people claiming it offers a wide range of health benefits. While red onions are undoubtedly nutritious, it’s important to understand what science actually says about drinking onion-infused water. Knowing the facts can help you make informed decisions and avoid unrealistic expectations.

What Is Red Onion Water?

Red onion water is a simple beverage made by soaking sliced red onions in water for several hours or overnight. Some recipes also include ingredients such as lemon juice, ginger, or honey to improve the flavor.

Unlike onion juice, which is concentrated, onion water is much milder because only some of the onion’s natural compounds dissolve into the water.

How to Make Red Onion Water

Making red onion water at home is straightforward.

Ingredients

• 1 medium red onion
• 2–3 cups of clean drinking water
• Optional: fresh lemon slices, ginger, or a small amount of honey

Instructions

1. Wash and peel the red onion.
2. Slice it into thin pieces.
3. Place the slices in a clean glass container.
4. Add the water and refrigerate for 6–12 hours.
5. Strain the liquid before drinking.
6. Consume within 24 hours for the best freshness.

Nutrition Facts

Red onions are naturally rich in nutrients and plant compounds, including:

• Vitamin C
• Vitamin B6
• Folate
• Potassium
• Dietary fiber
• Antioxidants such as quercetin and anthocyanins

However, because onion water is only an infusion, it contains far lower amounts of these nutrients than eating the onion itself.