Gruit as a product changed throughout its history. From a beer additive revered for its fermenting powers, it evolved into a beer with a reputation for powerful headache-causing herbals. The exact nature of gruit was once thought to be lost, but available sources paint an interesting picture of gruit, not just as a handful of brewing herbs, but as a powerful and necessary wort fortifier. Although not all puzzle pieces have been uncovered and gruit’s exact nature can’t yet be described, several theories adequately corroborate known facts.
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