Onion skins are often discarded without considering their remarkable medicinal value. Recent research and traditional medicine indicate that the infusion made from onion skins can bring numerous benefits to the body, especially when consumed in the morning on an empty stomach. This simple brew, made from an ingredient that would otherwise end up in the trash, has detoxifying, anti-inflammatory, diuretic, and antioxidant potential. The rich content of quercetin, flavonoids, and sulfur compounds transforms this water into a true tonic for the body.
What Does Onion Skin Water Contain?
The water obtained by boiling onion skins contains quercetin, a flavonoid with strong antioxidant and anti-inflammatory properties, as well as minerals such as potassium, calcium, and magnesium. It is also rich in sulfur compounds (such as allicin), saponins, anthocyanins (in the case of red onions), and soluble fibers. These compounds have proven effects on reducing inflammation, supporting the immune system, and improving digestion. Studies have shown that these substances do not disappear during boiling but are transferred into the water, making the infusion highly concentrated in active principles.
Benefits of Consumption in the Morning on an Empty Stomach
1. Stimulates the Elimination of Toxins from the Liver and Kidneys
Onion skin water has a natural diuretic effect, promoting the elimination of excess water and accumulated toxins in the body. This property indirectly helps liver function by reducing the filtering burden on the liver. In the morning, when the body is in a cleansing phase, this water can intensify detoxification processes, stimulating bile secretion and renal function. Quercetin and sulfur compounds have been associated with reducing inflammation in the liver, supporting cellular regeneration. When consumed regularly, it can have a tonic effect on the liver and urinary system.
2. Regulates Blood Pressure
The flavonoids in onion skins, especially quercetin, have a mild vasodilatory effect, contributing to the regulation of blood pressure. Studies show that individuals who consume foods rich in quercetin may have more balanced blood pressure. This action is due to the compound’s ability to reduce vascular inflammation and arterial stiffness. Consuming it on an empty stomach enhances the absorption of flavonoids, which can intensify the hypotensive effect. It is especially recommended in cases of mild hypertension or as an adjunct to medical treatment.
3. Strengthens Immunity
Onion skins contain compounds with antibacterial, antiviral, and antifungal effects that can strengthen the immune system. Consuming this water in the morning supports the activity of leukocytes and other defense cells. Quercetin has been shown to be effective in reducing symptoms in viral infections and inhibiting the replication of influenza viruses. Laboratory studies indicate increased activity against certain bacteria such as E. coli and Staphylococcus aureus. By naturally supporting the immune response, this water can become an ally during the cold season or periods of exhaustion.
4. Reduces Inflammation in the Body
Chronic inflammation is one of the major causes of modern diseases: arthritis, cardiovascular diseases, type 2 diabetes. Onion skin water reduces inflammation through the action of antioxidants and sulfur compounds that inhibit pro-inflammatory prostaglandins. Quercetin, in particular, has effects comparable to those of mild anti-inflammatories, without side effects. Daily consumption on an empty stomach can contribute to reducing joint pain, intestinal inflammation, and muscle discomfort. It is a safe option for those seeking natural alternatives for inflammation.
5. May Help in Glycemic Control
Quercetin and soluble fibers from onion skins can improve insulin sensitivity. In the morning, blood sugar levels can vary significantly in people with diabetes or prediabetes, and this infusion can temper these fluctuations. Studies indicate that regular intake of flavonoids reduces the risk of type 2 diabetes and improves glucose metabolism. Additionally, consuming it on an empty stomach amplifies the favorable glycemic response. This effect is especially useful within a controlled regimen for balancing blood sugar levels.
Scientific Studies
Study: Quercetin and its Anti-Inflammatory Effects Journal of Inflammation Research, 2021
This study analyzed the action of quercetin on systemic inflammation and metabolic diseases. Researchers found that the flavonoid acts on essential biochemical pathways, inhibiting enzymes such as COX-2 and inflammatory cytokines (TNF-α, IL-6). Through these mechanisms, quercetin reduces inflammation without affecting healthy cells. The study was conducted on animal models, but a significant reduction in inflammatory markers in the blood was observed. Moreover, quercetin consumption had positive effects on oxidative stress. The authors recommend including this substance in the diet, especially in its natural form (such as the infusion from onion skins). Researchers noted that bioavailability is increased when consumed on an empty stomach. This conclusion supports the regular morning use of the remedy.
Study: Protective Effects of Onion Peel Extract Against Oxidative Stress Plant Foods for Human Nutrition, 2018
This study examined the extract from onion skins on liver cells exposed to oxidative stress. The results showed that the extract significantly reduced levels of free radicals and increased the activity of antioxidant enzymes (SOD, catalase). Onion skins proved to be more effective than the bulb itself in protecting cellular DNA. The study also highlighted the extract’s ability to stimulate mitochondrial regeneration, contributing to improved cellular energy. Additionally, a protective effect on the cell membrane was observed, indicating the hepatoprotective potential of the infusion. The authors concluded that the infusion is a safe and effective source of antioxidants, recommended in detoxification regimens. This type of water, consumed daily, could prevent the accumulation of toxins at the cellular level. The effect was shown to be cumulative, so regular administration is important.
Contraindications and Precautions
- Allergy to Onions or Sulfur Compounds Individuals with sensitivity to onions may develop digestive irritations or allergic reactions.
- Low Blood Pressure Those already undergoing antihypertensive treatment should consult a doctor, as the vasodilatory effect may accentuate blood pressure reduction.
- Severe Kidney Impairment Although it has a mild diuretic effect, it is not recommended in cases of chronic kidney failure without medical advice.
- Pregnancy and Breastfeeding There are not enough studies regarding the safety of consumption during these periods; caution is recommended.
- Anticoagulant Medication Quercetin may interfere with the effects of warfarin or other anticoagulants.
How to Prepare
Ingredients:
- Skins from 2-3 onions (white, yellow, or red – untreated)
- 500 ml water
Preparation Method:
- Wash the onion skins well under running water.
- Boil them in 500 ml of water for 10-15 minutes.
- Let it steep for another 10 minutes, then strain.
- Drink warm in the morning on an empty stomach.
