Both flax and chia seeds are healthy additions to your diet. They're both good sources of plant-based omega-3 fatty acids, fiber, and minerals. ... Flax contains an omega-3 fat called alpha-linolenic acid (ALA), which has anti-inflammatory properties in the body.

As you know Chia seeds absorb water, they become like gel-like consistency, and it may help constipation.
Since I'm using Chia seeds & Flaxseeds in my cereal in the mornings it has eased my symptoms of chronic constipation.