Raw onion, especially in sandwiches and salads, may help control blood sugar. Some studies have shown that this vegetable, due to its antioxidant compounds, can improve insulin sensitivity and help maintain blood sugar balance; however, scientific evidence in this area is still limited.
The Role of Insulin in Blood Sugar Control
Insulin is a hormone that helps transport blood sugar into cells for energy. Diane Lindsey Adler, a nutritionist and assistant professor of pediatrics at New York Medical College, explains that when cells do not respond appropriately to insulin, a condition known as insulin resistance occurs, which can lead to increased blood sugar levels.
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A few small studies have examined the relationship between onion consumption and blood sugar control. In one of these studies, individuals who consumed 100 grams of raw red onion had lower blood sugar levels four hours later. However, this research did not determine whether this effect lasts beyond a few hours.
Benefits of Onion for Metabolic Health
In another study, women undergoing chemotherapy for breast cancer consumed varying amounts of fresh yellow onion for eight weeks. The results showed that women who ate 100 to 160 grams of onion daily had better indicators regarding blood sugar and insulin resistance. However, these findings may not be generalizable to other populations.
Quercetin, one of the compounds found in onions, may help improve insulin function by reducing inflammation. However, more research is ongoing, and it is still unclear how much onion is necessary.
Onions also contain prebiotic fibers like inulin, which help nourish beneficial gut bacteria. Supporting a healthy gut microbiome can aid in maintaining metabolic health and regulating blood sugar.
Despite these benefits, onions should not be considered a definitive treatment for high blood sugar. Individuals with insulin resistance or diabetes should continue to follow the dietary and treatment plans recommended by their physician.
Ultimately, consuming onions may cause gastrointestinal discomfort in some individuals. Therefore, it is important for people to focus on a balanced dietary pattern while continuing their necessary medical care.
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