Unfinished Tea is Most Likely to Form Tea Stains
Scientific research shows that drinking water contains minerals and trace harmful heavy metal ions. When water is heated, the solubility of certain calcium and magnesium ions decreases, leading to precipitation. These precipitates enter teacups during brewing. Unfinished tea or tea left standing exp...
Tea News · Nov 08, 2025
Washing tea cups must be thorough! Because tea scale can cause cancer!
Tea scale, the brown residue left in cups after drinking tea, forms when tea polyphenols oxidize with metal elements from tea stains. Scientific research indicates that tea scale contains harmful metals like cadmium, lead, mercury, and arsenic, which pose serious health risks, including potential ca...
Tea News · Sep 01, 2025
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