Flax seed oil is an oil very high in omega-3 fatty acids and lignans. It has been associated with anticancer, antiviral, antibacterial and antifungal properties. It has been used in a variety of conditions including allergies, immune problem, and some forms of cancer. As far as “does it work”? It is hard to know if it works or not. As far as if is safe – in small doses it is probably safe.