Is Onion a Blood Thinner?

Onions can thin your blood since they include flavonoids. Particular flavonoids, such as quercetin, which is discovered in onions, are anti-oxidants. This implies that onions might be able to protect you against totally free radicals that could otherwise damage cell tissues within your body. Onions need to not be used to replace any blood thinners you are on or cure any specific conditions. Speak with your doctor about the use and intake of onions prior to using them medicinally.


Quercetin only comes from a group of plant pigments called flavonoids. This is what gives various fruits, flowers and vegetables their color. The University of Maryland Medical Center acknowledges that quercetin supplements helps in reducing blood pressure in those who experience hypertension. Quercetin help in hypertension by thinning the blood, which is why onions can be helpful to those who struggle with hypertension as a natural blood thinner.

Blood Thinners

If you take blood thinners, speak with your doctor about the usage of onions, quercetin supplements and other foods or supplements that may thin your blood. Quercetin supplements can interfere with prescription and over the counter blood thinners such as coumadin, plavix and aspirin, according to the University of Maryland Medical Center. Quercetin supplements tend to improve the result of blood thinners, increasing the risk of bleeding.

Quercetin likewise may disrupt other medications, such as corticosteroids and chemotherapy drugs, which can prevent your body from absorbing specific medications.

Heart Protection

Certain flavonoids, such as those found in onions, black tea and dark chocolate appear to safeguard your heart, inning accordance with the University of Maryland Medical Center. Flavonoids can assist secure against high cholesterol and atherosclerosis, which is the plaque buildup in your arteries that can result in stroke and cardiac arrest. Onions may benefit particular conditions of the heart due to the thinning of blood, making it easier for your heart and circulatory system to pump blood.

Factors to consider

Specific types of onions may have a better result on blood thinning. According to a research study performed by the Department of Primary Industries at the Victorian Institute of Animal Science in Victoria, Australia, brown onions appear to work the best in regards to thinning blood — at least when it concerns testing pig topics.

The Victorian Institute of Animal Science evaluated numerous onion supplements, raw brown onions and fate onions over the course of six weeks. Blood levels were drawn and tested for thickening at numerous times during the research study. The end conclusion is that supplementation of raw brown onions made the most effect in concerns to lipid-modulating and immunostimulatory properties.

Onion Nutrition
Onion Nutrition Facts Serving Size 1 Medium Onion (148g) Percent Daily Values*
Calories 64 3%
Total Carbohydrate 11 g 4%
Total Fat 0 0%
Cholesterol 0 0%
Dietary Fiber 3 g 12%
Sugars 9 g
Protein 1.6 g 3%
Vitamin A 3 IU 0%
Vitamin C 11.8 mg 20%
Vitamin B6 0.2 mg 9%
Folate 28.5 mcg 7%
Calcium 36.8 mg 4%
Iron .3 mg 2%
Magnesium 15 mg 4%
Phosphorus 43.5 mg 4%
Potassium 190 mg 5%
Sodium 6.4 0%
Zinc .3 mcg 2%
Copper 0.1 mg 3%
Manganese 0.2 mcg 10%
Selenium 0.7 mcg 1%
Fluoride 1.8 mcg
Alcohol 0.0 g
Water 143 g
Ash 0.6 g
Caffeine 0.0 mg
*Percent (%) Daily Values are based on a 2,000 calorie diet.

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