It has become known how long it takes for brewed tea to turn into poison

Experts warn: leaving brewed tea for a long time is not a good idea, as this drink is considered a perishable product.

Chinese researchers have found that harmful compounds begin to appear in tea just 15 minutes after brewing. If a shiny film has formed on the surface, it means it's time to pour out the drink. This residue occurs due to oxidation and the multiplication of pathogenic microorganisms.

At room temperature, tea remains safe for no more than six hours. In the refrigerator, it can be stored for up to a day, but then it loses its beneficial properties and spoils. To get maximum benefits, tea should be consumed freshly brewed, reports "Klops" with reference to nutritionist Tatyana Vesna.