That vegetable is sweet leaf bush, also known as katuk (scientific name: Sauropus androgynus).

More than just a popular ingredient in many simple and delicious dishes, sweet leaf bush is considered a natural nutritional powerhouse. It is especially rich in iron—containing up to three times more iron than beef, which is often regarded as one of the best dietary sources of iron.

Sweet leaf bush is a familiar vegetable in many Southeast Asian households and is widely used in everyday meals.

1. Sweet Leaf Bush — An Easy-to-Grow Vegetable That Thrives Year-Round

Sweet leaf bush is a hardy shrub that tolerates heat and drought well and requires very little maintenance. Simply planting a stem cutting in the soil is often enough for it to take root and produce abundant new shoots within a few weeks.

The plant grows especially well during the summer, but in tropical climates such as Vietnam, it can be harvested year-round.

It prefers sunlight, loose soil, and moderate moisture. With proper care, a single plant can continuously provide fresh leaves for many years. This is why many Vietnamese families grow it in gardens, pots, or even foam containers on rooftops.

2. Outstanding Nutritional Value

Among leafy vegetables, sweet leaf bush stands out for its impressive nutrient profile. According to data from the National Institute of Nutrition, 100 grams of fresh leaves contain approximately:

• Iron: about 2.7 mg (around three times more than lean beef, which contains roughly 0.9 mg per 100 g)
• Calcium: about 169 mg
• Vitamin C: about 185 mg (more than oranges)
• Beta-carotene (a precursor to vitamin A)
• Vitamins B1 and B2
• Plant-based protein

It is also rich in dietary fiber, which supports digestion and helps prevent constipation. It is especially valued for children, postpartum women, and older adults.

3. Potential Health Benefits

Supports Healthy Iron Intake

Because it contains both iron and vitamin C, sweet leaf bush may help the body absorb iron more efficiently.

Traditionally Used After Childbirth

In Vietnamese cuisine, it is commonly cooked in soup with minced pork to support postpartum nutrition.

Helps the Body Stay Cool

The vegetable is traditionally considered cooling and is often eaten during hot weather.

Supports Bone Health

Its calcium and phosphorus content contributes to maintaining strong bones and teeth.

Supports Weight Management and Digestion

Low in calories but high in fiber, it can help promote fullness and support digestive health.

4. Popular and Nutritious Dishes

Sweet leaf bush is easy to prepare and works well in both vegetarian and meat-based dishes. Common recipes include:

• Sweet leaf soup with minced pork
• Sweet leaf soup with pork paste
• Stir-fried sweet leaf with garlic
• Boiled sweet leaf served with egg-based dipping sauce
• Sweet leaf soup with dried shrimp

5. Important Precautions

Do Not Eat It Raw

Raw sweet leaf bush contains papaverine, a naturally occurring compound that may affect smooth muscle function. It is best consumed cooked, especially for pregnant women.

Avoid Excessive Consumption

Although nutritious, drinking large amounts of raw sweet leaf juice may cause digestive discomfort in some people.

Sweet leaf bush is more than a humble backyard vegetable. With its rich content of iron, calcium, vitamins, and fiber, it is a highly nutritious and practical addition to a healthy diet. Easy to grow and simple to cook, it is an excellent choice for families looking to enjoy fresh, wholesome greens all year round.