In today's issue of GOOP, the Country Strong star and lemon-flavored flax oil ($10) before heading to school. So what is it? Flaxseed oil is rich in omega-3 essential fatty acids, the same healthy acids found in many fish, that help maintain circulatory health, reduce inflammation, and keep cells in top condition. It is also a natural laxative that can be used to keep the body functioning regularly. Lemon oil is added to this version of flax oil to give it a more appealing citrus taste. It is usually used to make salad dressings and smoothies.