yes, orange juice improves weak digestion & immunity
orange contain Vitamin B3, B5, C, carotenoids, folate, iron, potassium, calcium. also it act as anti-viral, anti-bacterial, anti-oxidant, anti-cancer, detoxifying, and is good for heart.
Orange is an excellent source of vitamin C. Vitamin C is a powerful natural antioxidant. Foods rich in vitamin C helps body develop resistance against infectious agents and also, scavenge harmful, pro-inflammatory free radicals from the blood and thus boost immune system.