Chia vs. Hemp vs. Flax
Which seeds pack the biggest nutritional punch? Nutrition Diva dives into a sea of seeds to find out.
One of the very first Nutrition Diva podcast episodes, back in 2008, was on the nutritional benefits of flaxseeds. Among other things, flaxseeds are a good source of omega-3 fatty acids, which is helpful for folks who don’t eat fish. At the time, flaxseeds were more or less alone in that category. Since then, however, two new omega-3-rich seeds have exploded onto the scene. I’ve gotten lots of questions from you about chia and hemp seeds and how they compare with flax. So today, we’re going to have a seed showdown to see how these various seeds stack up.
What Do Flax and Chia Have in Common?
Flax and chia are fairly similar nutritionally. Both are excellent sources of omega-3, each providing about 2400 mg of omega-3s per tablespoon. Both are also high in fiber, with chia having the edge—5 grams of fiber per tablespoon versus 3 grams for flax. Both also contain a modest amount of protein.
What Are the Differences Between Flax and Chia?
Flaxseeds are particularly rich in lignans, compounds that seem to provide extra protection against many types of cancer—a benefit that chia does not provide. On the other hand, flaxeeds have a hard shell and must be ground or thoroughly chewed in order for their nutrients to be absorbed. Tiny chia seeds do not have this protective armor and are readily digested without grinding.
Both flax and chia are high in soluble fiber. As you might recall from my previous show on soluble and insoluble fiber, soluble fiber is the type that absorbs liquid and forms a gel—and this can help slow the absorption of sugar and cholesterol from foods. And you can easily actually see this effect in action. If you stir a tablespoon of flaxseed into a quarter cup of water and let it sit for 30 minutes, the liquid becomes a bit thicker and more viscous. But this effect is much more dramatic with chia seeds. Stir a tablespoon of chia into a quarter cup of water or juice and ten minutes later you’ll have something that you can eat with a spoon, with a texture resembling tapioca pudding.
How Does Hemp Compare with Flax and Chia?
Hemp has much less in common with the other two. For one thing, hemp provides 50 to 75% more protein then either flax or chia. On the other hand, it has virtually no fiber. Soak a tablespoon of hemp in liquid and you just end up with wet hemp.
Hemp also isn’t as high in omega-3s. Flax and chia both provide about 2400 mg of omega-3 per tablespoon, while hemp only provides about 1000 mg. In addition, hemp is also much higher in omega-6. Flax and chia both provide about three times as much omega-3 as omega-6. With hemp, the ratio is reverse: about 3 times as much omega-6 as omega-3.
As I’ve talked about before, in order to get the most benefit from omega-3 (especially from plant-based sources), you need a balance between omega-6 and omega-3 fats in your diet. In general, our diets tend to be much higher in omega-6 than omega-3. And that’s what makes foods like flax and chia (as well as fish) so valuable: They provide a lot of omega-3 and not very much omega-6. Hemp, on the other hand, provides a lot of omega-3 but a whole lot more omega-6. So, as a way to balance the omegas in your diet, hemp is not as useful.
Chia vs. Hemp vs. Flax: Which seeds pack the biggest nutritional punch?