Castor oil has numerous benefits when used before going to sleep. It has been proven to promote hair growth, moisturize the skin, and improve digestion. Applying a small amount of castor oil on the scalp can stimulate hair follicles and enhance hair growth. Additionally, massaging the oil onto the skin before bedtime can provide intense hydration and delay the signs of aging. Moreover, consuming a teaspoon of castor oil before sleep aids digestion and relieves constipation. Using castor oil as a nightly routine can yield remarkable results for hair, skin, and digestive health.