Yeah exactly, it's not just taste. While bitter, catechins are the antioxidants that give green tea its cancer-fighting power. So your tea may taste less bitter

Yeah exactly, it's not just taste. While bitter, catechins are the antioxidants that give green tea its cancer-fighting power. So your tea may taste less bitter, but you're getting less benefit. Generally though if your green tea is too bitter you should reduce heat.