13 Best Chia Seeds Benefits & Side Effects You Should Know
Chia seeds have become very popular within the health food industry. They are a nutrient-dense food with several good qualities that offer health benefits.
They are a source of omega 3 fatty acids, protein, fiber, antioxidants, and more. Since they are plant-based, they are a good source of omega 3 fatty acids for vegans or people that don’t eat fish. Incorporating a couple of tablespoons of chia seeds to your diet is quite simple.
But what does the actual research say about these seeds? This article will review their nutrition content, potential health benefits, and how they can be incorporated into your diet.
What Are Chia Seeds?
Chia seeds are the tiny black seeds from the Salvia Hispanica plant. They have reportedly been around since the Aztecs and Mayans and used for their medicinal properties.
Decades ago it was popular to use them to grow our chia pets. Now they are a popular health food item and for good reason.
Chia Seeds Nutrition Facts
Chia seeds are a plant-based source of omega 3 fatty acids. They provide alpha-linolenic acid (ALA), which can’t be used by the body. ALA must be converted to EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) before the body can use it. EPA and DHA are the omega 3s found in fish.
Additionally, about 94% of the carbohydrate found in them is fiber. Fiber is a non-digestible form of carbohydrate that provides health benefits. It is recommended that women and men aim to consume 25 and 38 grams of fiber per day, respectively. Current estimates are that Americans get about only 15 grams daily.
Chia seeds are also a source of protein and several micronutrients and antioxidants.
Per 1 tablespoon, they provide (1):
- 56 calories
- 2 grams of protein
- 4.4 grams of total fat
- 2.4 grams ALA
- 3 grams of total carbohydrate
- 2.9 grams of fiber
- 26.3 mg calcium
- 41 mg magnesium
- 67.5 mg phosphorus
- 85 mg of potassium
Benefits of Chia Seeds
There are several potential benefits of eating chia seeds.
1. Boost Your Fiber Intake
Fiber offers several health benefits including improved bowel health, controlling blood sugar levels, lowering cholesterol, and helping with weight loss. The average American does not get enough of it in their diet.
Chia seeds provide more fiber than flax seeds. In fact, they provide more than twice the amount you can get from most other seeds or nuts (2). Simply adding 2 tablespoons of chia seeds to your diet could add over 5 grams to your intake.
This can simply be sprinkling the seeds over your cereal or oatmeal, adding to a smoothie, add them to baked goods, or making chia pudding.
2. Provides Antioxidants
Antioxidants are compounds that protect from oxidative stress.
Chia seeds offer 68 micrograms of lutein and zeaxanthin per tablespoon (1). These are antioxidants that are important to eye health.
The seeds also provide polyphenols, such as caffeic acid, chlorogenic acid, and quercetin. They are also a source of isoflavones (2).
3. Improve Digestion
Because of their fiber content, chia seeds may be able to improve your digestion and overall gut health.
4. Improves Satiety
Chia seeds may improve satiety. This is not surprising given their high fiber content.
One study in healthy people, found that chia seed consumption induced short-term satiety (3).
A small study found that appetite ratings were lower with chia seed intake (4). Another small follow up study, found that chia seeds compared to flax seeds, significantly reduced the desire to eat and participants overall appetite score (5).
5. Aid With Weight Loss
Due to their high fiber content, they may be a helpful aid with weight loss.
In fact, one study has shown significantly more weight loss in those who consumed chia seeds versus placebo (6). This was accompanied by a greater reduction in waist circumference ratio.
It is worth noting that the recorded weight loss in the chia seed group was only about 4 pounds over the course of 6 months. Yet, if weight loss is needed, a safe amount of weight loss is 1-2 pounds per week (which would equate to 26-52 pounds in a 6 month period).
Two other studies have not been able to find body composition changes as a result of chia seeds (7, 8).
A study evaluating several foods found that dietary modifications including chia seed resulted in weight loss and a reduction in waist circumference but the weight loss was not different from the placebo group (9).
So far, research has not shown that chia seeds will magically help with weight loss by themselves. Yet, including them in a healthy diet that is portioned to achieve weight loss may help.
6. Lower Blood Sugar
Including chia seeds in your diet may help with blood sugar control, an important benefit for people with type 2 diabetes.
One study in 11 healthy subjects, found a dose-response relationship to chia seeds and postprandial glucose levels (blood sugar after a meal). In other words, the more seeds consumed the better the reduction in post-meal blood sugar (4).
Another very small study of 13 healthy volunteers found that chia seeds helped attenuate blood sugar levels but the clinical significance of this in healthy people is questionable (10).
It should also be noted that at least one of the study investigators received funding from companies that produce and market chia seeds (10).
While it may be possible that eating chia seeds can help lower post meal blood sugar response, further research is still needed.
7. Reduce Heart Disease Risk Factors
There are several risk factors for heart disease and chia seeds have been proposed to help reduce some of these risk factors. This includes improving hypertension, improving lipid profiles or lowering cholesterol levels, and reducing markers of inflammation.
One study found that 35 grams daily of chia seed flour significantly reduced blood pressure, whether or not they were treated with medication (11). An additional study in people with diabetes found that 37 grams chia seeds daily for 12 weeks found a similar reduction (12).
However, two additional larger studies were unable to find a significant change to hypertension from including chia seeds in the diet (7, 8).
Most of the studies have not found any improvements in lipid profiles as a result of chia seeds (7, 8). One study did find a significant reduction in triglyceride concentration (9) but the chia seeds were given in combination with nopal, oats, and soybeans in this study so it is difficult to know if chia seeds had the desired effect.
C-reactive protein (CRP) is a blood test that is a marker of inflammation if elevated. One study of 12 subjects found that 37 grams chia seeds daily along with a healthy diet was able to reduce CRP levels (12).
Chia seeds have the potential to reduce heart disease risk factors but it is important that it is done in combination with a proper diet to promote heart health.
If consuming the seeds in moderation, side effects will be minimal. Yet, there is always a small chance that side effects can occur. A few possible side effects include:
8. Digestive Problems
Since chia seeds provide a lot of fiber, it is possible you could experience side effects of too much fiber in the diet (although you would need to be eating a lot of them). This could lead to abdominal bloating and gas, constipation, or abdominal pain.
To avoid any digestive problems, don’t eat excessive amounts of seeds and be sure to drink enough water.
9. Chia Seed Allergy
If you allergic to chia seeds, don’t eat them. Although rate, cases of chia seed allergy have been reported and the symptoms included shortness of breath, swelling, and hives (13).
10. Choking Hazard
This seems counter-intuitive because the seeds are so small. However, they expand and become gelatinous in liquids.
There was a case in which a young man swallowed a tablespoon of the seeds and drank water. It is unclear why, but the chia seeds stayed in the esophagus where they absorbed the liquid causing a blockage that required medical attention (14).
11. Exacerbate Flare-UPS Associated With Bowel Disease
Generally, seeds and nuts are not recommended for people experiencing a flare-up associated with bowel disease. This would include anyone with Crohn’s, colitis, or diverticulitis.
12. Interact With Medications
The seeds themselves don’t necessarily interact with medication. However, if you are on medication to control your blood pressure or blood sugar and you start adding more seeds to your diet, you will want to be cautious. Suddenly adding a lot more chia seeds could send your levels too low.
Be sure to discuss with your physician before making significant diet modifications or if you are having symptoms of low blood pressure or glucose.
13. May Increase Risk of Prostate Cancer
Some evidence suggests that high intakes of ALA are associated with an increased risk of prostate cancer (15). Chia is a great source of ALA so it may be prudent to avoid excess intake if you are already at risk of prostate cancer.
How Do You Eat Chia Seeds?
There several ways to incorporate chia seeds into your diet. They are flavorless and will take on any flavor that you add to it. It’s also important to note that they can absorb 10-12 times their weight in liquids.
Here are 10 simple ways to use the seeds:
- Add to water: Some people make chia water by mixing 1/4 c chia seeds with 4 cups of water. Since the seeds offer no flavor so you may want to add flavor to this by adding a small amount of fruit juice.
- Make a chia pudding: This is the most popular way to incorporate them. There are many recipe ideas available for puddings and it makes a great breakfast or snack. Since the seeds are flavorless, you can add your desired flavors – cocoa, coconut, or simply sweetened with honey or maple syrup. Then top it with fresh fruit and nuts.
- Add to oatmeal: They can be added to oatmeal, steel-cut oats, or overnight oats for an added nutritional boost.
- Use as an egg substitute: Since the seeds become gelatinous in a liquid, they can be used in place of eggs in baked goods. This is a popular substitute for vegans when baking and a recipe calls for eggs. A common method for one egg is to let 1 tablespoon of chia seeds sit in 3 tablespoons water until it becomes a pudding consistency
- Add to smoothies: Chia seeds can be blended into smoothies or added as a topping in smoothie bowls. This is a great way to add more protein and omega 3s to a food that is often mostly carbs.
- Baked goods: Chia seeds can be added to muffin recipes in the same way you would use flax seeds. You can also the seeds to your baked bread recipes.
- Make a jam: Chia jams are becoming increasingly popular. There are several recipes to make jams with fresh or frozen fruit and added chia seeds.
- Thicken soups: Adding chia seeds to a soup can help to thicken it.
- Add to a breakfast cereal: Chia seeds can be sprinkled over any breakfast cereal but they can also serve as the cereal itself.
- Add to a salad or any spreads: Sprinkle chia seeds over salads or a spread or dip. They could also be blended into spreads, such as hummus.
Where to Buy Chia Seeds
Chia seeds are widely available and can be found at a grocery store or health food store.
Whole foods and Amazon have them available. Walmart is also a great place to find organic versions at an affordable price. I have also found them at Trader Joe’s.
You can find chia seeds from reputable brands like Bob’s Red Mill, Kiva, Sunfood, and Nutiva.
Chia seeds are a nutrient dense food. They provide protein, fiber, and omega 3 fatty acids – all of which are nutrients important to our health and preventing heart disease. In addition, the benefits of chia seeds include multiple micronutrients and antioxidants.
Research to date has not proven that chia seeds, by themselves, are a magic bullet. A recent systematic review concluded that current evidence does not support any health claims for chia seed in any indication (16).
Yet, nutrition experts agree that they are a healthy food choice and rich in essential nutrients.
They may have the potential to offer several health benefits but you will get more benefits from them when they are consumed as part of a healthy diet to maintain a healthy weight.
- US Department of Agriculture. FoodData Central. Accessed August 26, 2020. https://fdc.nal.usda.gov.
- Kulcyznki B, Kobus-Cisowska J, Taczanowski MJ, Kmiecik D, Gramza-Michalowska A. The chemical composition and nutritional value fo chia seeds – current state of knowledge. Nutrients. 2019;11:1242-1258.
- Ayaz A, Akyol A, Inan-Eroglu E, Cetin AK, Samur G, Akbiyik F. Chia seed (Salvia Hispanica L.) added yogurt reduces short-term food intake and increases satiety: randomized controlled trial. Nutr Res Pract. 2017;11:412-418.
- Vuksan V, Jenkins AL, Dias AG, et al. Reduction in postprandial glucose excursion and prolongation of satiety: possible explanation of the long-term effects of whole grain Salba (Salvia Hispanica L.). E J Clin Nutr. 2010:64:436-438.
- Vuksan, V., Choleva, L., Jovanovski, E. et al. Comparison of flax (Linum usitatissimum) and Salba-chia (Salvia hispanica L.) seeds on postprandial glycemia and satiety in healthy individuals: a randomized, controlled, crossover study. Eur J Clin Nutr. 2017;71:234–238.
- Vuksan V, Jenkins AL, Brissette C, et al. Salba-chia (Salvia hispanica L.) in the treatment of overweight and obese patients with type 2 diabetes: a double-blind randomized controlled trial. Nutr Metab Cardiovasc Dis. 2017;27:138-146.
- Nieman DC, Cayea EJ, Austin MD, Henson DA, McAnulty SR, Jin F. Chia seed does not promote weight loss or alter disease risk factors in overweight adults. Nutr Res. 2009;29:414-418.
- Nieman DC, Gillitt N, Jin F, Henson DA, Kennerly K, Shanely RA, et al. Chia seed supplementation and disease risk factors in overweight women: a metabolomics investigation. J Altern Complement Med. 2012;18:700-8.
- Guevara-Cruz M, Tovar AR, Aguilar-Salinas CA, et al. A dietary pattern including nopal, chia seed, soy protein, and oat reduces serum triglycerides and glucose intolerance in patients with metabolic syndrome. J. Nutr. 2012;142:64-69.
- Ho H, Lee AS, Jovanovski E, Jenkins AL, DeSouza R, Vuksan V. Effect of whole and ground Salba seed (Salvia Hispanica L.) on postprandial glycemia in healthy volunteers: a randomized, dose-response trial. E J Clin Nutr. 2013;67:786-788.
- Toscano, L.T., da Silva, C.S.O., Toscano, L.T. et al. Chia Flour Supplementation Reduces Blood Pressure in Hypertensive Subjects. Plant Foods Hum Nutr. 2014; 69:392–398.
- Vuksan V, Whitham D, Sievenpiper JL, et al. Supplementation of conventional therapy with the novel grain salba (Salvia hispanica L.) improves major and emerging cardiovascular risk factors in type 2 diabetes. Diabetes Care. 2007;30:2804-2810.
- Garcia Jimenez S, Pastor Vargas C, de las Heras M, Sanz Maroto A, Vivanco F, Sastre J. Allergen characterization of chia seeds (Salvia hispanica), a new allergenic food. J Investig Allergol Clin Immunol. 2015;25:55-6.
- Simmelink A, Rawl RE, Browne L, Scobey M. Watch it grow: esophageal impaction with chia seeds. Open J Clin Med Case Rep. 2017;4:49.
- Pelser C, Mondul AM, Hollenbeck AR, Park Y. Dietary fat, fatty acids and risk of prostate cancer in the NIH-AARP diet and healthy study. Cancer Epidemiol Bimarkers Prev. 2013;22:697-707.
- Teoh SL, Lia NM, Vanichkulpitak P, Vuksan V, Ho H, Chaiyakunapruk N. Clinical evidence on dietary supplementation with chia seed (Salvia hispanica L.): a systematic review and meta-analysis. Nutr Rev.2018;76:219-242.