white and red halved onions
[Allium cepa]

Onion: the miracle healing plant that everyone has at home

The onion is one of the oldest cultivated plants of mankind and has been cultivated and used for more than 5000 years. In early antiquity, the onion was even used as a means of payment. Since the onion as a spice plant is a constant throughout human history, it was also never forgotten as a medicinal plant. In modern times, it also came to play a certain role as a dyeing plant, as it produces wonderful golden-yellow hues. Unfortunately, however, these are not lightfast and fade again. Thus, its career was limited to poor social classes or the hobby field of dyeing. In modern phytotherapy it has a firm place and is also popular as a home remedy for children and adults.

Onion facts

Did you know that...

...the onion was also used to treat the plague (unsuccessfully)?

...the characteristic odor is due to sulfur compounds?

...onion juice softens tough meat when marinated in onions?

What is onion?

The onion is a herbaceous plant that is cultivated as an annual or biennial and then harvested. In the first year, it does not form flowers, so they can concentrate their efforts on the formation of a bulb. From the second year it is possible to form a flower in addition to the bulb and leek. The flower can take on shades between white and purple. Both the leek and the bulb of the onion are used, the leek being much milder than the bulb. The onion, once it has formed its leek, gives off a distinct, characteristic odor that can be smelled far and wide. Today, the onion is used in cooking mostly in small quantities because of its flavor. In the past, there were whole dishes whose main ingredient was the onion as the sole vegetable, such as the onion tart.

General and healing properties of onion

The basic knowledge


The onion is antibacterial. Fresh onions have an antibacterial effect and are therefore used for infections. Mostly preparations are applied externally, but internal applications are also common. In this case, swelling, pain and inflammation quickly go down due to fresh onion juice.

Blood pressure lowering

The onion is blood pressure lowering. Studies have observed that the consumption of onions has a positive effect on blood pressure and lower it. Thus, the onion reduces the risk of cardio-vascular diseases and has a preventive effect on health.

Wound healing

The onion is wound healing. It disinfects wounds, prevents infections and thus helps the body to heal the wounds faster and cleaner.

Allium cepa: Ingredients

The onion contains various substances with a wide spectrum of action in the human body. For many animals the onion is poisonous.

You can find the following ingredients in the onion:

  • Insulin-like hormone
  • Sulfur-containing isoalliin
  • Peptides
  • Flavonoids

Onion: effect for body and mind

In naturopathy, the onion is often used for detoxification. As it is a source of sulfur, it activates cell cleansing and purifies the Pischingen area. The onion is therefore often combined with other medicinal plants that support the excretory organs such as the liver and kidneys, as these have the task of making the waste products released by the onion urinable and excretable. The onion also has a similar effect on mucous membranes, where its antibacterial action is mostly used to ward off and treat infections. Therefore, the onion is detoxifying and relieving for humans and gives the organism a chance to undergo a housecleaning. It is important to always drink plenty of fluids when using onion therapeutically, so that neutral fluid is made available for excretion. On a spiritual level, the onion is also about cleansing. Old issues are activated and can thus be processed and overcome.

Onion properties

  • Detoxifying
  • Eliminating
  • Purifying
  • Promotes wound healing
  • Antithrombotic
  • Antibacterial

Fields of application in naturopathy

[Allium cepa]

The onion has its various applications in which it is successfully used therapeutically. In the following, these are addressed and explained.

Onion for hypertension

Various factors play an important role in high blood pressure. One very important factor is vascular tone, i.e. the tension of the blood vessels. Studies have shown that onions have a lowering effect on this tone. As a result, the blood vessels relax and thus the pressure in the blood vessels decreases. Lower blood pressure is welcome because it reduces the risk of strokes and heart attacks.

Allium cepa for loss of appetite

The liver is an organ that has a lot to do with the feeling of hunger and appetite. If the organism is much occupied with metabolic waste products and their elimination, this means a lot of stress and work for the liver. As a result, affected individuals often no longer feel hungry and complain of latent nausea. The onion can help here, since it activates the detoxification of the body with its sulfur compounds and thus in the medium term also the liver is relieved again.

Onion for cough

Traditionally, onion syrup is used for coughs. The onion thereby loosens the stuck mucus, acts against bacteria and calms the inflammation in the bronchial tissue. The mucolytic effect relieves the bronchial tubes and lungs, allowing them to recover. Less mucus always means less coughing, because the body feels less stimulus to bring the mucus outside.

Allium cepa for earache

The structures of the ears are very sensitive and consist of fine membranes, which become inflamed during an ear infection. Since the onion has an antibacterial effect, the cause of the inflammation is directly combated. In addition, the essential oil of the onion also has a wound-healing and analgesic effect, which is used in this case. To soothe the delicate skins of the ear.

Onion in prevention of cancer

More recent studies on onions have shown that they can significantly reduce the risk of colon cancer. It is assumed that the sulfur compounds and their cell detoxifying effect are responsible for this. An abundant consumption of onions in food is therefore recommended and considered healthy.

Allium cepa for high cholesterol

Cholesterol is an endogenous substance that is increasingly formed in the case of so-called oxidative stress. Oxidative stress is the accumulation of free radicals that cause damage to cell walls. Since the onion has a detoxifying effect, it helps the body to eliminate substances that raise the level of free radicals. As a result, the body's need for cholesterol decreases and blood levels drop.

Notes on the use of onion

Through food, the onion can be consumed daily. Its positive effects are recognized. As a component of naturopathic medicines, it is usually taken as part of a complex remedy for existing problems. Here it is used as a cure and is taken several times a day.

Onion in pregnancy & lactation

The onion can be taken both during pregnancy and breastfeeding without any hesitation.

Discover our sprays

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Use the healing power of Allium cepa!

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Red and white onions, sliced and whole onions



Botanical name

Allium cepa

Plant family

Amaryllis family

Other designations

Kitchen onion


June to August (in the second year)

Harvest time

June till September


full sun, warm



Flower color

white to purple

Flower shape


Leaf color

light to dark green

Leaf shape

lanceolate, narrow

Sheet properties

tubular, hollow, corrugated

Soil type

loamy, with humus

Soil moisture

moderately humid


Acidic to weakly acidic

Lime compatibility


Nutrient requirements




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