food and the body
Why is salt avoided during certain Hindu fasts?
What the fasting rules say
Hindu fasts, called vrat, come with specific rules about what you can and cannot eat. During fasts like Ekadashi, which happens twice a month, and Navratri, the nine-day festival, regular salt from the sea is often avoided. But rock salt, called sendha namak, is allowed. The difference matters to the idea of ritual purity. Regular salt is seen as processed and everyday, while rock salt is thought of as natural and pure, closer to the earth. Some fasts are stricter than others. In very strict fasts, even rock salt may be limited. In gentler ones, it is used freely. The rules change by region, by which deity or occasion is being honored, and by family custom.
What Ayurveda adds
Ayurvedic tradition classifies salts differently. Rock salt is seen as lighter and easier to digest than sea salt, which is thought to be heavier and more heating to the body. During a fast, when the digestive system is working less, a lighter salt makes sense in this view. Rock salt is also seen as calming, while sea salt is thought to stir up more energy. So the choice of salt fits with the idea that fasting is a time to slow down and lighten the body.
In practice today
Many people who fast still follow the rock salt rule, either because they believe in its purity or because it is what they grew up with. Others use regular salt without worry. Some people abroad find rock salt hard to get and use what they have. The strictness of the rule depends on how seriously someone takes the fast and what their family teaches. It is not a health rule but a custom tied to the meaning of the fast itself.