In Jain practice, bread made with yeast is generally not preferred.

Reason:

• Yeast is considered a living microorganism, so using it involves himsā in a very subtle form.
• Jain dietary discipline aims to avoid harm to all living beings, including very small and invisible life forms.

In many Jain households and observances, yeast-based bread is avoided, especially by those following stricter food rules. However, some Jains may differ in practice depending on family tradition, sect, and level of observance.

Safer Jain-friendly choices are:

• unleavened roti
• chapati
• phulka
• plain flatbreads made without fermentation

So, the simple answer is: traditionally, Jains should avoid yeast bread when possible.