The high street pharmacy chain says the test, which involves blood analysis, could help to prevent hair loss. Customers will have their blood drawn in Superdrug Health Clinics by a nurse during a 20-minute appointment, before it is sent to a laboratory for analysis. Some respondents admitted to skipping social events, cancelling job interviews and avoiding being photographed due to hair thinning. Two thirds of women felt they were judged more harshly than men for experiencing hair loss. Article continues below ADVERTISEMENTResults are available within three to five days and could help users make changes to improve their hair health.