Mustard oil is a type of vegetable oil made from mustard seeds. It’s widely used in cooking, particularly in South Asian cuisine, where it’s valued for its strong flavor and high smoke point. It has a distinct, pungent taste that can add depth to dishes.

Here are a few key points about mustard oil:

1. Culinary Uses: It's commonly used for frying, sautéing, and pickling. In Indian and Bangladeshi cooking, it's a staple in many recipes.

2. Health Benefits: Mustard oil contains monounsaturated fats, omega-3 fatty acids, and antioxidants. It is believed to have anti-inflammatory properties and can aid in digestion.

3. Regulations: In some countries, like the U.S., mustard oil is not approved for cooking due to concerns about erucic acid, which is present in high amounts. It’s often sold as a massage oil or for external use only.

4. Flavor Profile: The oil has a spicy, tangy flavor that can be quite strong, so it’s usually used in moderation.

5. Traditional Uses: Besides cooking, mustard oil is used in some cultures for its medicinal properties and as a base for massage and skin care.