While many people claim to use rice water on their hair every day with no issues, it's generally recommended to use rice water for hair care no more than once a week.
Dr. Penzi, a dermatologist, cautions against using it more frequently, as it could risk protein buildup in the hair. This buildup could lead to a variety of hair issues like dryness, brittleness, and even breakage.
Those with particularly dry or brittle hair might want to use rice water even less often, such as once a month. This approach allows time for the hair to naturally replenish moisture and prevent excessive protein build-up.
It's important to remember that everyone's hair is different, and what works for one person may not work for another. Experiment with different frequencies and listen to your hair's needs to find what works best for you.