Onions may bring tears to your eyes, but they also bring big health benefits to your body. These pungent, flavorful bulbs pack a serious nutritional punch. Science has shown onions contain compounds that may help prevent cancer, boost heart health, build strong bones, improve gut health, fight bacteria, and regulate blood sugar. Let’s explore all the ways onions can supercharge your health.
Cancer Prevention Abilities
Onions contain several compounds that exhibit anti-cancer effects. Two of the most beneficial are quercetin and organosulfur compounds.
Quercetin is a flavonoid antioxidant found in many fruits and vegetables. However, onions are one of the richest sources. Research indicates quercetin may inhibit the growth of cancer cells and tumor formation. The antioxidants in onions neutralize free radicals throughout the body. This prevents oxidative damage to cells and reduces mutation risks.
One study found that people with the highest onion intake had the lowest rates of colorectal cancer. Other research shows quercetin may be especially protective against ovarian and laryngeal cancers.
In addition to quercetin, onions contain organosulfur compounds like diallyl sulfide. These sulfur-containing compounds show anti-carcinogenic activities. They may deactivate cancer-causing agents and prevent tumor development.
According to studies, organosulfur compounds from onions may help prevent stomach, colorectal, and breast cancers. So make sure to eat your onions! They provide a safe, natural defense against one of the world’s leading killers.
Heart Health Booster
Onions are also great for cardiovascular health. They contain two compounds that support heart health - quercetin and sulfur.
As mentioned, quercetin is an antioxidant that fights free radical damage. Oxidative stress contributes to atherosclerosis - the narrowing of arteries caused by plaque buildup. The antioxidants in onions help prevent this process and reduce heart disease risk.
Onions are one of the main dietary sources of sulfur. Sulfur compounds, like diallyl disulfide, may help lower blood pressure and cholesterol levels. Research shows these sulfur compounds decrease LDL cholesterol, total cholesterol, and triglycerides.
Additionally, sulfur inhibits platelet aggregation in the blood. This prevents dangerous blood clots that can lead to heart attacks and strokes. The sulfur in onions works as a natural blood thinner.
By lowering blood pressure, reducing cholesterol, and preventing clotting, the compounds in onions boost heart health and slash cardiovascular risks.
Bone Strengthening Effects
Onions may also help keep your bones strong. They contain antioxidant flavonoids that benefit bone health.
These antioxidants reduce oxidative stress throughout the body’s tissues. This is important because oxidative stress activates cells that destroy bone. The antioxidants in onions suppress these destructive cells.
Onions also increase the production of osteoblasts. These are cells that build new bone tissue. More osteoblasts means more bone formation and density.
Research shows that women who consume the highest amounts of antioxidants from fruits and veggies have the greatest bone density. Onions’ antioxidant effects may be especially beneficial for postmenopausal women at risk for osteoporosis.
So remember to eat your onions for resilient, fracture-resistant bones as you age.
Gut Health Guardians
Onions contain special compounds called prebiotics that promote gut health.
Prebiotics are non-digestible fibers that act as food for probiotics. Probiotics are the beneficial bacteria in your gut microbiome. When prebiotics from an onion reach your colon, your good gut bacteria feast on them and multiply.
Specifically, onions contain the prebiotic fructooligosaccharides (FOS). FOS nourishes probiotics like Bifidobacteria and Lactobacillus that inhibit pathogens, reduce inflammation, and enhance immune function.
Onions also provide insoluble fiber that adds bulk to stool and relieves constipation. This improves regularity and prevents toxic buildup in the colon.
Furthermore, onions’ prebiotics and fiber feed the beneficial bacteria that produce short-chain fatty acids like butyrate. Butyrate is the main energy source for colon cells and helps maintain a healthy intestinal lining.
Overall, eating onions regularly helps create a thriving community of good bacteria in your gut. This strengthens your digestion, immunity, and overall health.
Onions contain powerful compounds that fight bacteria and infections. Once again, quercetin is a key antibacterial agent.
Research indicates quercetin in onions is particularly effective against E. coli and S. aureus. Both of these bacteria cause foodborne illnesses that can have severe symptoms.
One study found that quercetin isolated from onions inhibited the growth of E. coli. Another trial showed that quercetin from onions boosts the effects of antibiotics against S. aureus.
The organosulfur compounds in onions also have antibacterial properties. These sulfur compounds may inhibit the growth of foodborne pathogens like Salmonella, E. coli, and Bacillus cereus.
So eating onions provides a natural layer of defense against many common bacterial infections. The quercetin and organosulfur compounds in onions attack bacteria and prevent them from multiplying in the body.
Blood Sugar Regulation
Onions contain certain flavonoids that help regulate blood sugar levels. They may be beneficial for people with diabetes or prediabetes.
Specifically, onions have high concentrations of quercetin and anthocyanins. These flavonoids boost insulin production and activity in the body. More insulin means more efficient regulation of blood sugar.
A study found that quercetin in onions lead to increased insulin secretion and sensitivity. Other trials show onion extracts lowering blood sugar levels in diabetic rats.
Onions also have a low glycemic index, meaning they do not cause sharp spikes in blood sugar. This steady regulation of blood glucose further helps manage diabetes.
So onions provide a tasty way for people to maintain healthy blood sugar levels. Add onions to your diet and harness their natural anti-diabetic power.
Tips for Eating More Onions
After learning about all these incredible health benefits, you probably want to eat more onions. Here are simple ways to increase your onion intake:
- Add raw red, white, or yellow onions to salads, sandwiches, burgers, and tacos
- Sautee onions in olive oil and incorporate into stir fries, frittatas, and omelets
- Caramelize onions to bring out their natural sweetness and use as a pizza, burger, or hot dog topping
- Make French onion soup, loaded with flavorful sauteed onions
- Bread and bake onions into casseroles, savory tarts, and quiches
- Grill onions alongside meats and other veggies
- Add diced onions to soups, chilis, and stews
- Make pickled red onions for a tangy sandwich or taco topping
- Roast whole onions in the oven until tender and spread on sandwiches instead of condiments
- Choose sweet onions like Vidalias for raw applications and salads
When shopping, choose firm, shiny onions without sprouts or blemishes. Store them in a cool, dry place out of direct sunlight. With proper storage, onions last 1-2 months.
Onions are inexpensive, versatile, and packed with nutrients. By eating more onions you’ll boost your overall health in many ways. So don’t cry over onions - eat them and reap their incredible benefits!