Psyllium husk and flaxseed are both excellent sources of dietary fiber, but they differ in composition and benefits. Psyllium husk is primarily composed of soluble fiber, which absorbs water and forms a gel-like substance in the gut, helping with constipation and diarrhea. Flaxseed, on the other hand, contains both soluble and insoluble fiber, which can help with digestion and overall health, including omega-3 fatty acids and antioxidants. When deciding between psyllium husk and flaxseed, it is important to consider individual needs and preferences. If the primary goal is to improve constipation or diarrhea, psyllium husk may be more effective. If looking for a broader range of health benefits, including omega-3 fatty acids and antioxidants, flaxseed might be a better choice.