But, for the most part, those “health claims” are unsubstantiated and, at best, shaky. Plus, there are serious side effects of
flax seed oil. For example, Some researchers believe flaxseed may affect blood clotting factors. This can be particularly worrisome for individuals who are taking blood thinning medications such as Coumadin, Heparin or even aspirin. If you wish to take flaxseed oil, and you're taking these types of medications, you should first consult with your doctor.