Iron is an essential mineral that plays a critical role in overall health. It is necessary for the production of hemoglobin, which helps carry oxygen through the blood, supports metabolism, strengthens the immune system, and contributes to healthy brain development.

When people think of iron-rich foods, beef is usually the first that comes to mind. However, several plant-based foods also provide significant amounts of iron — one of the most impressive being the edible hibiscus (known in Vietnamese as rau đay).

Edible Hibiscus vs. Beef: A Nutrient Comparison

According to data from the United States Department of Agriculture (USDA), 100 grams of cooked edible hibiscus contains approximately 3.14 mg of iron, whereas 100 grams of beef contains only 2.6 mg. This means that edible hibiscus actually provides more iron per serving than beef.

This leafy vegetable is easy to find in local markets across Vietnam and is commonly used in traditional dishes such as crab soup with hibiscus, hibiscus with gourd, or hibiscus with shrimp. Beyond its impressive iron content, edible hibiscus is packed with a wide range of nutrients that offer remarkable health benefits.

Health Benefits of Edible Hibiscus

1. Natural Cooling and Detoxifying Properties

In traditional Chinese medicine, edible hibiscus is often referred to as “the medicine of the poor.” It is described as having a slightly bitter taste and a cooling nature that helps clear heat, reduce internal inflammation, detoxify the body, and relieve swelling. It has traditionally been used to treat heatstroke, sun-induced fever, dysentery, and skin conditions such as ulcers or boils when applied externally.

2. Anti-Inflammatory and Antibacterial Effects

Dr. Lam Ngoc Khiet, Vice Director of the Department of Traditional Medicine at Sun Yat-sen Memorial Hospital, Sun Yat-sen University (China), notes that edible hibiscus contains numerous antioxidants that help reduce inflammation, combat bacteria, and strengthen the body’s defense against infections and viruses.