Whether you can eat jaggery (a traditional unrefined sugar) during a fast depends on the type of fast and the specific guidelines you are following. Here are some common scenarios:

1. Religious Fasts:
• Hindu Fasts (like Navratri, Ekadashi): Generally, jaggery is allowed during these fasts. It's often used in various fasting recipes.
• Islamic Fasts (Ramadan): Jaggery can be consumed during suhoor (pre-dawn meal) and iftar (meal to break the fast) but not during the fasting hours.
• Christian Fasts (Lent): The guidelines can vary. Some may allow natural sweeteners like jaggery, while others may avoid all forms of sugar.
• Jewish Fasts (Yom Kippur, Tisha B'Av): Typically, no food or drink is allowed during the fast.
2. Intermittent Fasting:
• During the fasting period, consuming jaggery is generally not recommended because it can break the fast due to its caloric content and sugar. However, it can be consumed during the eating window.
3. Health Fasts (Detox, Juice Fasts):
• The rules can vary. Some detox fasts might allow a small amount of natural sweeteners like jaggery, while others may strictly avoid all forms of sugar.
4. Cultural or Regional Fasts:
• Guidelines can be very specific to the tradition. In many Indian cultural fasts, jaggery is often included.

In summary, whether jaggery is permissible during a fast depends on the specific rules and objectives of the fast you are observing. It's always best to check the specific guidelines for the type of fast you are following.