Salmon DNA used in these facials is typically derived from purified salmon DNA fragments (often called PDRN or PN). While the treatment does not involve eating fish, individuals with a known fish allergy should inform their dermatologist or aesthetic practitioner before considering the procedure, as there may be a risk of an allergic reaction. Those who follow a vegetarian or vegan lifestyle for ethnic or religious reasons may also prefer to avoid this treatment because it is animal-derived. Your skincare professional can recommend suitable alternatives based on your preferences and medical history.