ILASH has been shown to be safe to the skin in multiple tests conducted by an independent research laboratory. In the tests, no symptoms of skin sensitization (contact allergy) were observed in the human test subjects. However, as with any cosmetic product, some individuals may be allergic to one or more components of the product. If you know that you are allergic to any of the ingredients in ILASH, or if you suspect that you may be allergic to any of the ingredients, do NOT use ILASH. If you suspect that you may have had or are having an allergic reaction, stop using the product and consult a physician immediately. Some ILASH users have reported a mild irritation at the base of the eyelashes. If you experience such irritation, either reduce or discontinue the use of ILASH Eye Lash Conditioning Serum until the irritation goes away. If the irritation persists, discontinue use completely and consult your physician.