Lettuce, romaine. Also called cos lettuce. Probably the oldest form of cultivated lettuce. The Roman emperor Augustus Caesar, who believed that this vegetable rescued him from illness, erected a statue in its honor.
What happened in the healing process? Imagine the emperor did not eat meat for a few weeks because of sickness, just some water, raw vegetables. The detoxification happened because of unintentional fasting. The emperor did not handle any political issues or any fight with opponents. The relaxation and meditation happened. Maybe the emperor even sought the meaning of life, and pursued some spiritual fulfillment.
Of course, the health benefits of raw lettuce had very positive impacts, especially when combined with fasting and detoxification. Normal functioning of the body restored. And the emperor praised the lettuce for its healing power.