Mustard seeds are rich in fibers, selenium, manganese, and magnesium, which boost immunity, maintain various bodily mechanisms and are crucial for bone health. Mustard seeds contain numerous glucosinolates-derived antioxidants, including isothiocyanates and sinigrin.

Eating mustard seeds, leaves, or paste is generally considered safe for most people, especially when consumed in amounts typically found in the average person's diet. Mustard seeds is a very potent stimulant, and can help the liver and spleen produce increased levels of digestive enzymes, which can increase the speed of digestion and body's metabolic capacity. The diaphoretic ability of mustard seeds can also help in flushing out toxins from the body.