A scientist from County Cavan has found a new way to help treat cancer.
Shane Cronin's research shows that by activating the immune system with happiness hormones, the body's serotonin can fight disease more effectively.
Scientists, working at the Institute of Molecular Biotechnology at the Austrian Academy of Sciences (IMBA), have published their innovative paper on how to activate the immune system in the journal Nature.
Mr. Cronin, from Ballyjamesduff, explained that activating the immune system means the body can defend itself against cancer cells and attack pathogens.
He said: "What we actually showed in the paper is that by increasing and increasing the amount of BH4, t cells are more aggressive and able to fight cancer much more aggressively.
"So this has very important clinical implications because the way we can change BH4, we actually develop new drugs to do this, and also by changing it, there are drugs that have been used for completely different purposes."