yes this is true aloe vera is anti inflammatory and it treats the chest symptoms in asthmatics and oranges got vitamin C helps in tissues repairing and help clearing chest congestions. So the combination treat chest symptoms for sure and good for asthmatics.
Is it really work? the most important thing in dealing with this is to examine the evidence. Maybe there really healed that way. But if it happens only 1 in 100, then it could not be accounted for. For a growing paradigm in the health sector today is based on the evidence.