Orange juice can be a healthy choice for weight loss at any time of day, including night. It is a good source of Vitamin C and other nutrients, and can be a refreshing and satisfying option for a nighttime snack. However, it is important to consume it in moderation as it does contain natural sugars. It is also recommended to choose freshly squeezed orange juice or 100% pure orange juice without added sugars for the best weight loss benefits.