Onion peel, often discarded during food preparation, is a nutrient-rich byproduct that is increasingly recognized for its health benefits. While most of the research on onions focuses on the bulb, the outer layers or skins of onions contain various valuable compounds that offer numerous health advantages. Below are the detailed benefits of onion peel.

• Onion skins are particularly high in a type of flavonoid called quercetin, which possesses potent antioxidant properties. These compounds help neutralize free radicals in the body, reducing oxidative stress and lowering the risk of chronic diseases such as heart disease and cancer.
• Quercetin and other phenolic compounds have been shown to reduce inflammation in the body. This property may help in managing inflammatory conditions such as arthritis, asthma, and other chronic inflammatory diseases.
• The antioxidants in onion peel can help improve cardiovascular health by reducing blood pressure and lowering LDL cholesterol levels. Quercetin, in particular, is known for its ability to promote healthy blood circulation and may reduce the risk of heart disease.
• Onions, including their skins, are known to enhance the immune system’s functioning. The compounds in onion peel may boost the body’s defenses against infections and illnesses.
• Onion peel exhibits antimicrobial properties that may help combat various bacteria and fungi. This makes it potentially useful in food preservation and as a natural remedy for certain infections.
• Onion skins are a source of dietary fiber, which supports digestive health by promoting regular bowel movements and beneficial gut bacteria. A high-fiber diet can also aid in weight management.
• Some studies suggest that onion peel extracts may help lower blood sugar levels and improve insulin sensitivity, making them potentially beneficial for individuals with diabetes.
• Due to its antioxidant and anti-inflammatory properties, onion peel can be used in homemade beauty treatments. Some people use onion peel infusions on the skin for its purported ability to improve complexion and to promote hair growth when used in hair rinses.