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5 science-backed health benefits of flaxseeds and how to add them to your diet.

Flaxseed benefits include lowering cholesterol and regulating blood sugar levels.
Flaxseeds are also high in essential nutrients like fiber, omega-3 fatty acids, and lignans.
Ground flaxseeds have the most health benefits and can be sprinkled on oatmeal or in smoothies.
Visit Insider’s Health Reference library for more advice.
Flaxseeds are small gold or brown seeds that come from flax plants. These tiny seeds can be purchased at most grocery stores and are packed with health benefits.

Here are five reasons why you should be eating flaxseeds and how to add them to your diet.

1. Flaxseeds are high in omega-3 fatty acids

Flaxseeds are one of the richest plant-based sources of omega-3s. Omega-3s are essential fatty acids that can reduce the risk of heart disease, fight inflammation, and decrease liver fat.

Omega-3 fatty acids come in three forms: alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). Flaxseeds are rich in ALA – one tablespoon of flaxseed oil has 7.26 grams. Your body cannot produce ALA on its own, making it an essential component of anyone’s diet.

2. Flaxseeds are high in fiber

Flaxseeds have insoluble and soluble fiber – both of which are important for maintaining overall health. One tablespoon of ground flaxseed has about 2 grams of fiber.

“Insoluble fiber can help regulate bowel movements and prevent constipation, while soluble fiber dissolves in water to form a gel, which slows digestion,” says Hannah Magee, RD, a registered dietitian-nutritionist based on the East Coast of Canada.

These properties are what make fiber integral for good digestive health, says Tracy Lockwood Beckerman, RD, MS, CDN, a registered dietitian based in New York City.

3. Flaxseeds may improve cholesterol levels

Flaxseeds may help lower total cholesterol levels and LDL cholesterol levels. Lowering LDL cholesterol, or “bad cholesterol,” levels can reduce your risk of heart disease.

A small 2015 study examined how flaxseed altered cholesterol levels in people with peripheral artery disease – a heart condition that causes reduced blood flow around the body. About half the study participants consumed 30 grams of ground flaxseed daily for one year and the remaining consumed a placebo. LDL cholesterol levels in the group who ate flaxseeds decreased by 15% and total cholesterol levels decreased by 11% after one month of supplementation.

4. Flaxseeds contain high amounts of lignans

a plate of food with a fork and knife: Egg yolks will range in color—from pale yellow to deep orange to even a bright red—based on a hen's diet. Because free-range hens often eat more pigmented, nutritious foods that range from insects to grasses, eggs from these chickens often have richer-colored yolks. On the other hand, conventional, grain-fed chickens will produce lighter yellow yolks. As for those red yolks we mentioned? One chef—Dan Barber, executive chef of New York-based Blue Hill restaurants—worked with Cornell University researchers to develop a feed blend high in red peppers that allowed hens to produce strawberry-colored yolks.As for the difference in nutrients between yolk colors? The protein and fat counts will often remain the same regardless of yolk color, but there can be up to a 100-fold increase in micronutrient value of certain antioxidant carotenoids like lutein and beta-carotene in yolks fed a more nutrient-dense diet (like in pasture-raised hens), according to a 2010 study published in the Journal of the Science of Food and Agriculture. Rich, dark yolks will contain more of these potent antioxidants: compounds which mop up harmful toxins that promote inflammation and fat storage. Other studies have indicated that the same healthy diet that produces richer-colored yolks results in eggs with higher levels of heart-healthy omega-3s and less cholesterol.

a plate of food with a fork and knife: Egg yolks will range in color—from pale yellow to deep orange to even a bright red—based on a hen’s diet. Because free-range hens often eat more pigmented, nutritious foods that range from insects to grasses, eggs from these chickens often have richer-colored yolks. On the other hand, conventional, grain-fed chickens will produce lighter yellow yolks. As for those red yolks we mentioned? One chef—Dan Barber, executive chef of New York-based Blue Hill restaurants—worked with Cornell University researchers to develop a feed blend high in red peppers that allowed hens to produce strawberry-colored yolks.As for the difference in nutrients between yolk colors? The protein and fat counts will often remain the same regardless of yolk color, but there can be up to a 100-fold increase in micronutrient value of certain antioxidant carotenoids like lutein and beta-carotene in yolks fed a more nutrient-dense diet (like in pasture-raised hens), according to a 2010 study published in the Journal of the Science of Food and Agriculture. Rich, dark yolks will contain more of these potent antioxidants: compounds which mop up harmful toxins that promote inflammation and fat storage. Other studies have indicated that the same healthy diet that produces richer-colored yolks results in eggs with higher levels of heart-healthy omega-3s and less cholesterol.
Lignans are a type of plant nutrient called a phytoestrogen. These compounds have similar chemical structures to estrogen, the female sex hormone, and produce similar responses in the body.

“Lignans can alter the activity of estrogen and testosterone in our bodies and may help reduce the risk of hormone-related cancers like breast and prostate cancers,” says Magee.

Flaxseeds are the richest dietary source of lignans. One tablespoon of flaxseeds contains about 31.5mg of lignans.

Lignans also have antioxidant properties, meaning they prevent cells from becoming damaged through a process known as oxidative stress. Oxidative stress occurs when too many free radicals accumulate in the body, and can lead to chronic diseases such as heart disease. Free radicals come from both natural bodily processes like metabolism and outside sources like smoking or pollution.

“[Lignans’] robust antioxidant content has shown promise in reducing the risk of diabetes and card

5. Flaxseeds help regulate blood sugar

Flaxseeds are loaded with fiber, which helps regulate blood sugar levels by slowing the absorption of sugar into the body. Eating fiber-rich foods helps reduce the risk of type 2 diabetes thanks to its ability to regulate blood sugar.

A small 2011 study found flaxseeds reduced blood sugar levels in people with type 2 diabetes. Participants either consumed 10g of flaxseeds daily or received a placebo. After one month, those who consumed flaxseeds saw a 19.7% average reduction in blood glucose levels.

How to add flaxseeds to your diet

To reap the full health benefits of flaxseeds, it’s best to eat them ground. This is because your body can’t break down whole flaxseeds to absorb their nutrients.

You should also choose ground flaxseeds over flaxseed oil as the latter does not contain lignans.

A 2008 study compared how much ALA participants ingested from eating ground flaxseeds, flaxseed oil, and whole flaxseeds. It found participants in the study who ate ground flaxseeds had higher levels of ALA and experienced the least amount of adverse side effects from supplementation.

If you do have whole flaxseeds, you can grind them up in a coffee grinder, blender, or food processor.

Here are some suggestions from Magee about ways to add ground flaxseeds into your diet.

  • Mix them into smoothies, oatmeal, or yogurt.
  • Add them to baked goods, pancakes, or French toast.
  • Sprinkle them on top of salads, sandwiches, pasta dishes, and soups.
  • Use ground flaxseeds in place of breadcrumbs in cooking.

If you do start adding flaxseeds to your diet, start small. Because of its high fiber content, eating too many flaxseeds can cause uncomfortable side effects such as bloating, gas, or diarrhea.

Overall, Magee recommends eating no more than two to five tablespoons per day to “reap the nutrition benefits and avoid any uncomfortable side effects” – and to also drink plenty of water.

Insider’s takeaway

Flaxseeds are a plant-based food source that may help improve your cardiovascular and digestive health. They can easily be added to your diet by sprinkling ground flaxseeds into your meals. Like many health foods, eating too much may have some unfavorable consequences, so be sure to consume just two to five tablespoons a day and stay hydrated to prevent bloating or gas.

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