Flax seeds are small oil seeds that contain omega-3 fats, fiber, and other plant compounds. They may help improve digestion and reduce the risk of heart disease, type 2 diabetes, and cancer.
Flaxseeds have 534 calories per 3.5 ounces (100 grams) — corresponding to 55 calories for each tablespoon (10 grams) of whole seeds.

They consist of 42% fat, 29% carbs, and 18% protein.