Alternatives to flax seeds could include chia seeds, hemp seeds, or pumpkin seeds. These seeds also offer high amounts of fiber, omega-3 fatty acids and various essential minerals and vitamins, making them a nutritious substitute for flax seeds. However, the specific quantities of these nutrients may vary from flax seeds, so it's important to consider what nutritional benefits you are specifically looking for when choosing an alternative. For example, chia seeds are an excellent source of fiber with nearly 10 grams per ounce, surpassing flax seeds which offer about 7.6 grams per ounce. Keep in mind, the daily recommended dietary fiber intake for adults is around 25 to 30 grams.