Is it Safe to Have Curd (Dahi) at Night?

Curd is an essential part of an Indian diet, especially if you go down South. There it is almost equivalent to a staple, one you can't do without. The people enjoy it with rice, in their desserts and even in their beverages. If you don't happen to like milk, curd works as an excellent alternative.
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Is it Safe to Have Curd (Dahi) at Night?