Some scientific studies have found that the polyphenol compound quercetin of onion has anti-cancer properties and it reduce the chances of the growth of prostate cancer and lunge cancer. Quercetin is also a very powerful anti-oxidant which helps to reduce the inflammation in the body and helps promote towards good general heath.
Next to water, people drink tea more than any beverage in the world, particularly in Asia and Europe. Tea is a rich source of many antioxidants. Within thirty to fifty minutes after drinking a cup of brewed tea, blood levels of antioxidants rise by 40 to 50 percent and may last for up to eighty minutes. Black and green tea contains various antioxidants including quercetin and catechins that can reduce the risk of coronary heart artery disease and stroke significantly. Tea also lowers the blood level of homocysteine, a protein compound that is highly damaging to cardiovascular system (heart). But the cardiovascular and anti-cancer benefits of tea (green or black) are substantially reduced if milk and sugar is added to the tea, a practice all too common in Pakistan, India and whole south Asia. This because some ingredients in milk (such as lactalbumin, fatty acids, and calcium) may bind to tea’s antioxidants and phenolic compounds at high temperatures, and reduce their absorption from the digestive tract.
Regular Black or green tea contains high amounts of antioxidants, therefore it has anti-cancer or cancer protection qualities but when taken with sugar and milk it doesn’t work as an antioxidant. Try to take tea without sugar and milk.