Iron(II) sulfate was used in the textile industry for centuries as a dye fixative. It is used historically to blacken leather and as a constituent of ink. The preparation of sulfuric acid ('oil of vitriol') by the distillation of green vitriol (Iron(II) sulfate) has been known for at least 700 years. Together with other iron compounds, ferrous sulfate is used to fortify foods and to treat and prevent iron deficiency anemia. Constipation is a frequent and uncomfortable side effect associated with the administration of oral iron supplements. Stool softeners often are prescribed to prevent constipation. Ferrous sulfate was used in the manufacture
What Is Love? (Twice song) What Is Love? (Twice song) "What Is Love?" (stylized as "What is Love?") is a song recorded by South Korean girl group Twice, the lead single of their fifth extended play of the same name. The song was released on April 9, 2018 by JYP Entertainment and distributed by Iriver. "What Is Love?" was written and composed by Park Jin-young, who previously produced "Signal", and it was arranged by Lee Woo-min "collapsedone", who co-produced "Knock Knock" and "Candy Pop". According to JYP Entertainment, the song is about "the love girls would dream about or imagine after learning about it through