Glutathione S-transferases (GSTs) are known to abolish or reduce the activities of intracellular enzymes that help detoxify environmental carcinogens. such as those found in tobacco smoke. It has been suggested that polymorphisms in the GST genes are risk factors for lung cancer. but a large number of studies have reported apparently conflicting results. https://www.deliandiver.com/product-category/milk-frother-tube/