Brewed tea delivers the most significant health benefits, according to a new scientific review published in *Beverage Plant Research*, while processed bottled or bubble teas often negate these perks with added sugar and additives. The study links regular consumption of properly brewed tea, particularly green tea, to reduced risks of heart disease, cancer, diabetes, and cognitive decline. However, heat treatment during processing and prolonged shelf life can degrade beneficial compounds like polyphenols and catechins.

Dietitians emphasize that maximizing benefits requires using whole-leaf tea and minimizing or eliminating sugar, as added ingredients often outweigh the tea's inherent advantages. This finding underscores the importance of preparation method over mere consumption frequency for health-conscious individuals.