10 Possible Side Effects Of Quercus Robur (English Oak)

Quercus robur, also known as English oak, has some side effects when used improperly, such as diarrhea, stomach pain, and allergic reactions.

These side effects can occur due to an excessive intake of quercetin, a polyphenol compound present in the herb.

In severe cases, an overdose of quercetin can exacerbate gastrointestinal issues, making it difficult to perform daily tasks and leading to nutritional deficiencies, ultimately affecting one's quality of life.

This article explains in details the 10 most common side effects of Quercus robur if used imporperly.

1. Interacts with medications

Quercus robur, also known as English Oak, causes allergic reactions due to the presence of specific proteins and polyphenols in its leaves and bark.

These compounds can trigger an immune response, leading to symptoms such as hives, itching, and swelling.

The allergenic properties are attributed to the high content of Ole europaea pollen, which is responsible for triggering IgE antibodies in sensitive individuals, resulting in allergic reactions upon exposure.

2. Interacts with medications

Quercus robur, also known as English Oak, triggers respiratory problems due to its allergenic properties.

The plant's pollen is a common allergen that can cause reactions in susceptible individuals, leading to symptoms such as congestion, coughing, and wheezing.

Additionally, the tree's leaves and seeds contain small amounts of quercetin, a natural compound that can stimulate an allergic response, further exacerbating respiratory issues.

3. Interacts with medications

Quercus robur, also known as English Oak, increases blood pressure due to its high concentration of flavonoids and phenolic acids.

These compounds can cause a constriction of blood vessels, leading to an increase in blood pressure.

Additionally, the saponins present in Quercus robur may also contribute to this effect by stimulating the sympathetic nervous system, which can further elevate blood pressure.

4. Interacts with medications

Quercus robur, also known as English Oak, aggravates digestive issues due to its high tannin content.

The tannins can bind to protein in food and cause a decrease in nutrient absorption, leading to symptoms such as bloating, gas, and stomach discomfort.

Additionally, the quinic acid present in Quercus robur may also contribute to the exacerbation of digestive issues by altering gut bacteria and disrupting normal bowel function.

5. Interacts with medications

Quercus robur, also known as English oak, induces stomach upset due to its high tannin content.

Tannins are naturally occurring compounds that can bind to proteins in food and impede digestion, leading to nausea, bloating, and discomfort.

As Quercus robur is rich in these tannins, it can cause gastrointestinal irritation when ingested, resulting in stomach upset symptoms for some individuals.

6. Interacts with medications

Quercus robur, also known as English Oak, causes drowsiness due to its sedative properties.

The plant contains a compound called quercetin, which has been shown to have a calming effect on the nervous system, leading to feelings of relaxation and reduced alertness.

Additionally, Quercus robur may interact with other medications that affect the central nervous system, further contributing to drowsiness.

7. Interacts with medications

Quercus robur, also known as English oak, provokes anxiety attacks by interfering with the body's natural serotonin levels.

This occurs because the compound aesculin, found in Quercus robur, can bind to certain receptors in the brain, disrupting the balance of neurotransmitters.

As a result, individuals may experience increased feelings of apprehension, fear, and unease, leading to anxiety attacks.

8. Interacts with medications

Quercus robur, also known as English Oak, activates skin irritation due to its tannins and phenolic compounds, which can cause allergic reactions or contact dermatitis.

The plant's bark and leaves contain these potent chemicals that can stimulate the immune system, leading to redness, itching, and inflammation on the skin.

These allergenic properties are thought to be responsible for triggering an adverse response in some individuals who come into contact with Quercus robur.

9. Interacts with medications

10. Interacts with medications

Quercus robur, also known as English Oak, increases liver enzymes.

This is likely due to its high flavonoid and polyphenol content, which can induce cytochrome P450 enzyme activity in the liver, leading to elevated levels of liver enzymes.

Additionally, Quercus robur's tannins may also contribute to this effect by interacting with liver cells and altering their metabolic pathways.