What is Flax Seed Powder? Flaxseed is a plant-based ingredient that has long been popular due to its rich source of omega-3 fatty acids. Our Flax Seed Powder is made purely from 100% quality flaxseeds which are finely ground down into a powder. This creates a versatile and easy-to-use ingredient that can be added to your favourite shake or bakes to give them a nutritious boost.