There are many claims about the efficacy of licorice, such as those given in Post #2. However, none of these (except for the one about ulcers) has actually been proven by scientific studies. There are also studies showing that licorice can help with dyspepsia, but these studies have only been done in conjunction with other herbs (not with licorice alone).
Here's a link:
Liquorice decreases the number of transaminase, if the liver is affected at cellular level
Liquorice has antiviral effects against viruses of the herpes family
It protects gastric and duodenal mucosa, having multiple and still poorly known effects. It exerts an inhibitory activity against Helicobacter Pylori bacteria that causes dyspeptic syndromes and ulcers.
Doses of liquorice should not be exaggerated, because it can cause mineral retention and it can increase blood pressure. It could be consumed as tea, using liquorice's roots, but also as additive in sweets.