Written By: Gloria Tsang, RD
Title: Founding Registered Dietitian
Alumni: University of British Columbia
Last Updated on:
Their high content of omega-3 alpha linolenic acids (ALA) has made ancient flax seeds a modern miracle food. In the past 20 years, flax seeds have been touted as a super food, and these tiny wonders surely live up to the name! With multiple types of flaxseed products available in the market such as whole seeds, ground flax meal, flax oil and more, how do you go about choosing the right one for your use?
Table of Contents
Brown Flax Seeds | Golden Flax Seeds | Ground Flax Meal | Flax Oil | |
Serving Size: | 3 Tbsp (31 g) | 3 Tbsp (31 g) | 3 Tbsp (21 g) | 1 Tbsp (13.6 g) |
Calories: | 165 | 170 | 112 | 120 |
Protein: | 5.6 g | 6.0 g | 3.8 g | 0.02 g |
Fat: | 13.1 g | 11 g | 8.9 g | 13.6 |
ALA: | 7.1 g | n/a | 4.8 g | 7.3 g |
Carbohydrate: | 8.9 g | 10 g | 6.1 g | 0 |
Fiber: | 8.4 g | 8 g | 5.7 g | 0 |
Net Carb: | 0.5 g | 2 g | 0.4 g | 0 |
Potassium: | 251 mg | 269 mg | 171 mg | 0 |
Most flax seeds available commercially are brown flax seeds. They are oil seeds, also known as linseeds, originated from the Middle East. In addition to the beneficial alpha-linolenic acid content, flax seeds are also known for its rich lignan content. Studies found that flax seeds provide ~ 9 to 30 mg of lignan per gram of seed. Lignan provides fiber, and is a source of antioxidant phytoestrogen. Researchers revealed that lignan in flax seeds shows promise in fighting disease – including a possible role in cancer prevention, especially breast cancer. It is thought that lignan metabolites can bind to estrogen receptors, inhibiting the onset of estrogen-stimulated breast cancer.
Golden flax seeds taste slightly more buttery, and lighter in taste. Nutritionally, golden and brown are almost the same. In the latest quality research report published by Canadian Grain Commission in 2022, golden flax seeds were found to have more ALA than brown flax seeds. Researchers found that 54.6% of the fatty acid comprised of alpha-linolenic acid in brown flax seeds, while 58.7% of the fatty acid comprised of ALA in golden flax seeds. In the same report, golden flax seeds are found to provide more fat than brown flax seeds as well.
Ground flax seeds are also available commercially; sometimes they may be labeled as flax meal. Ground seeds are easier to digest, as the outer shell of the whole seeds may be difficult to chew or digest for some individuals. Alternately, you can always use a food processor to grind whole seeds yourself.
Flax seed oil is not the same as flax seeds. Extracted from flax seeds, flax seed oil is a concentrated source of ALA, the use of which has been questioned because of its potential association with increased prostate cancer risk. Cancer-protecting lignans, for instance, are only present in flax seeds, not oil.
There is no clear recommendation of how much flax seed one should take to reap the health benefits. Most studies investigated the doses between 10 to 50 grams of raw, ground flax seed. Some studies reported that an intake of 45 g of flaxseed has laxative effects.
Many commercial food products now contain flax seeds, including bread, cereal, and bakery goods. Bakers sometimes use flax seed flour or include flax seeds in baking as well. Certainly, flax seeds can be added to a variety of homemade dishes!
Both brown and golden flax seeds taste better toasted. The easiest way to toast flax seeds is to lay them flat on a cookie sheet and bake them in the oven at 350F for about 8 minutes. Make sure to stir half way.
Tell Us: How do you eat flax seeds?
Alumni: University of British Columbia – Gloria Tsang is the author of 6 books and the founder of HealthCastle.com, the largest online nutrition network run by registered dietitians. Her work has appeared in major national publications, and she is a regularly featured nutrition expert for media outlets across the country. The Huffington Post named her one of its Top 20 Nutrition Experts on Twitter. Gloria’s articles have appeared on various media such as Reuters, NBC & ABC affiliates, The Chicago Sun-Times, Reader’s Digest Canada, iVillage and USA Today.
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