Lime juice turns alkaline in your gut, which helps heal ulcers. .Limes also help lower blood pressure, are high in soluble fiber and have a very low glycemic index which mean they are good for diabetics too...
Limes are also very good against many forms of cancer due to to their phyto nutrients having cancer cell killing properties and the alkalizing effect they have on the entire human system...Limes of course are also great for gum inflammation and the prevention of scurvy.
The prevention of scurvy is one reason the British were sometimes called Limy's (which beats being called "scurvy dog's") because they brought limes aboard the ship to chew on. The sailors also didn't mind having limes aboard ship, because when the limes grew old, hard and were no longer useful the sailors could use them for cricket practice.