The LDN radio show, hosted by Linda Elsegood, featured guest speaker Sara from the US, who shared her experience of living with MCAS (Mast Cell Activation Syndrome) and POTS (Postural Orthostatic Tachycardia Syndrome). Sara discussed her diagnosis of MCAS and how her symptoms became severe at the age of 29, possibly triggered by exposure to pesticides. She also mentioned experiencing allergies, rashes, and sinus infections since childhood, indicating early signs of her condition. Sarah emphasized the importance of dietary changes and finding a supportive doctor who recommended supplements to help manage her condition.