Mast Cell Action was established in 2016 to support patients like Caspyn, he can only tolerate 20 foods, who likely suffer from a newly recognised condition called Mast Cell Activation Syndrome (MCAS). Most patients and their families, including many newly born babies, spend years going in circles looking for help. The charity provides support to suspected MCAS patients and works to raise awareness of this condition amongst doctors and lobby for NHS recognition.