Although mustard oil plays a big role of mustard oil for the hair but it has some side effects. In this article, we will discuss the serious side effects of mustard oil. 

Lets discuss about Side Effects of Mustard Oil one by one:

Contains Erucic acid:

Several studies have shown that mustard oil contains a huge amount (about 42% to 47%) of erucic acid. It is a bizarre fatty acid compound (omega-9 monounsaturated fatty acid), known to be very toxic by nature. Due to the presence of these abundant amounts of erucic acid in mustard oil, it can present serious health risks. Ingestion of high doses of mustard oil is associated with cardiovascular, respiratory, diarrheal, anaemia, cancer, coma and even death in the most severe cases.

Eruciacic acid is an omega-9 mono saturated fatty acid. Mustard oil contains 42% of it. When consumed in high doses, it has an effect on the heart.

These effects can sometimes be toxic. This acid causes a high risk to human health, such as cardiovascular, respiratory, diarrheal, anaemia, cancer and death in severe cases.

Influences heart health:

The high erucic acid content of mustard oil can have a negative effect on the health of our heart and cause considerable damage. It is best known to cause a certain medical condition known as’myocardial lipidosis’ or’fatty degeneration of the heart’ in which fibrotic lesions develop in the myocardial fibres or heart muscles due to the accumulation of triglycerides or fat droplets in them. It seriously damages the heart muscles and can sometimes even lead to heart failure.

Distortion of heart health is one of the main side effects of cooking with mustard oil. Our heart cannot take mono saturated fatty acids.

The fatty acids present in mustard oil cause’myocardial lipidosis’, which is a fatty degeneration of the heart. It develops fibrotic lesions in the myocardial fibres of the heart.

It is due to the accumulation of triglycerides in them. It can sometimes lead to heart failure due to degeneration of the heart muscles.

Increases the risk of lung cancer:

In addition to the increased cardiovascular risks, erucic acid in mustard oil also affects our lungs. In the initial stage, it can simply affect the upper part of our respiratory system (especially the respiratory tract), causing respiratory problems and so on. But the long-term ingestion of mustard oil can expose us to lung cancer, which is absolutely fatal.

It leads to Dropsy:

In 1998, the Delhi government banned the use of mustard oil for cooking food to stop the rapid increase in dropsy cases. It is basically the most severe form of edema in which the soft tissues of the human body swell to a large extent due to an unusual accumulation of fluid.

Causes irritation:

Mustard oil is very known to contain another harmful chemical compound called allyl isothiocyanate. It is an extremely strong and powerful irritant which, when taken orally, can cause inflammation of the walls of the lungs, gastrointestinal tract, intestines, etc. The irritating property of mustard oil can also cause problems such as abnormal tear secretion, increased sensitivity and neuroexcitation.

Causes skin lesions:

Long-term topical application of mustard oil can affect the skin in several ways. Studies have shown that it interrupts the skin barrier function and increases water loss through the epidermis, significantly altering the keratinocyte structure of the epidermis. It can even cause minor to major blisters. This is why modern medical science suggests avoiding the use of mustard oil for infant and child massage.

Prolonged use of mustard oil causes skin rashes. It is similar to the rashes of’Pityriasis Rosea’. This rash is mild in nature but can cause great discomfort.

If you notice such symptoms, stop applying the oil immediately and apply an ice pack for immediate relief. Visit the doctor for a consultation.

Gives external eruptions:

The external application of mustard oil can also cause certain rashes on the skin. These are similar to’pityriasis rosea’ rashes and are mild in nature. However, if ignored, these eruptions can cause significant discomfort.

May cause allergic reactions:

Allergic reactions are also common among the side effects caused mustard oil. These are mainly allergies to immunoglobulin E or IgE-mediated immunoglobulins, such as redness, itching, dry and cracked skin, etc. and they are not very serious.

 Causes Rhinitis:

Excessive consumption of mustard oil can cause rhinitis in which the mucous membrane tends to catch fire. It is characterized by coughing, sneezing, nasal congestion, nasal discharge and post-nasal discharge. It is therefore better to reduce your consumption to get rid of this strange side effect of mustard oil.

 Affects pregnancy:

Pregnant women should avoid consuming mustard oil, as it contains some chemicals that are harmful to them and to the growing fetus. According to the researchers, these chemicals can cause a miscarriage.

It is not easy to give up something that is not only part of your daily diet, but also a traditional and cultural symbol. Don’t worry, you don’t need to throw away all that mustard oil either. But you can limit its consumption to prevent these kinds of side effects. After all, health matters!

Are you aware of any other side effects of mustard oil? If you know of any other side effects of cooking with mustard oil, let us know by commenting below.

Side effects of mustard oil according to different studies:

Mustard oil is considered one of the most dangerous essential oils due mainly to the presence of allyl isothiocyanate and erucic acid (a toxic omega-9 monounsaturated fatty acid). According to the U.S. National Center for Biotechnology Information (PubChem), the allyl isothiocyanate compound is toxic by skin penetration and ingestion. It is also known to emit toxic fumes when exposed to high temperatures.


The European Union has banned the use of mustard oil as a cosmetic ingredient and the International Fragrance Association (IFRA) has banned its use in perfumes. Allyl isothiocyanate in mustard oil is not recommended for therapeutic use, mainly because of its toxicity, irritant nature and severe tear gas effect (powerful to produce tears), which raises concerns about the safe use of this oil in the medical industry.

In general, essential oils are listed with possible safe levels for therapeutic purposes, but there is no viable information on safe levels for the use of mustard oil.


The mammalian immune system overreacts to allergens, producing antibodies called IgE (immunoglobulins). Allergic reactions are also caused when these antibodies move to cells that discharge chemicals.


The most important adverse skin effects of mustard oil are allergic reactions due to IgE, itching, redness, severe skin irritation, followed by blisters and mucosal irritation.


Prolonged use of mustard oil on the skin can interfere with skin function, increasing water loss from the epidermis and then modifying the structure of epidermal keratinocytes.


Few sources also claim that inhalation of mustard oil can cause irritation of the eyes, nose, mucous membranes, respiratory system and an unpleasant sensation in the head.


Some studies indicate that topical use of mustard oil can cause irritating contact dermatitis and other allergic reactions. It is also proven that this oil is linked to the development of skin rashes of the pityriasis rosea type (skin lesions), which has been proven by patch tests.


Tests on Chinese hamster cells have proven the genotoxic effects of allyl isothiocyanate and would also cause transition cell papillomas and hyperplasia when tested on male rats.

Mustard oil should be strictly avoided by pregnant women as it has the power to induce uterine contractions and can cause unusual bleeding and miscarriages.


Mustard oil tends to lower blood sugar levels and can interfere with your usual diabetes medications and low blood sugar levels can interfere with surgical procedures, so it is advised to avoid mustard oil for about 2 weeks before and after your scheduled surgery.