Yes, mustard oil is edible and widely used in cooking.

From a Jain perspective:

• Using edible oils (like mustard oil) is generally permissible, as it comes from seeds and is used for food.
• The key is to practice ahimsa (non-violence) in daily life. This includes minimizing harm to living beings during harvest and processing if possible (e.g., choosing products produced with gentler methods or from suppliers aligned with care for life).
• Jain practices also emphasize not eating root vegetables; mustard oil itself is not a root vegetable, so it does not fall under that specific restriction. There isn’t a major doctrinal difference between Digambar and Shwetambar traditions on the permissibility of mustard oil.

If you want a more detailed Jain perspective on food, ahimsa, and oils, I can summarize specific scriptures or points from Jain texts.