Research indicates that onions are not only a delicious vegetable but can also strengthen human bones. Scientists from the University of Bern in Switzerland found that laboratory mice showed a significant improvement in osteoporosis after being fed onions daily. Dr. Rudolf Brenneisen, the leader of the study, said that consuming a certain amount of onions daily may also help prevent and treat human osteoporosis. Based on body weight, a person would need to consume 400 grams of onions daily to achieve the same effect.