The name “wormwood” notwithstanding, and despite its wood-like texture when dried, Artemisia absinthium is not a wood but a leafy plant with delicate yellow flowers. The name comes from its supposed vermicidal properties – a cure (“wode”) for worms. John Gerard, the English herbalist, wrote in his “Herball” of 1597 that wormwood “voideth away the wormes of the guts.” By the late nineteenth century, this wholesale reputation had been all but buried, and a scientific consensus emerged, according to which absinthe was the source of grievous mental and bodily harm, because of the wormwood oil it contained. Administered in sufficient quantities, this compound is highly toxic, a point that the nineteenth-century doctors and scientists liked to demonstrate by injecting guinea pigs with concentrated essence of wormwood and watching the animals’ slow and agonizing death by convulsions. At the same time, the drink’s defenders saw wormwood as the most probable cause of absinthe’s purported lofty high. Wormwood was at once a source of danger and of delight. By the first decade of the twentieth century, the focus of the scientific debate had narrowed around the toxin thujone, which was isolated from wormwood oil - it is about sixty per cent thujone - and identified as the cause of the harmful effect. These days, it is a key element in absinthe’s appeal. Posting on internet discussion groups are full of tales of thujone-inspired highs, and several Czech producers tout the high thujone content of their product. Conversely, thujone also remains fundamental to the notoriety of absinthe and to its precarious legal status.(Only a couple of months ago, there was intense speculation about the role of absinthe in the disappearance of a young man who apparently fell from the side of a ship in the Mediterranean last summer, while on a honeymoon cruise.) When the French law pertaining to absinthe was revised, in 1988, it stipulated an upper limit in liquors sold as a “spirit” of absinthe, and thirty-five milligrams in a product labelled as a “bitter.”
As recently as 2000, a group of researchers at Berkeley and at Northwestern University announced, in the Proceedings of the National Academy of Sciences, that they had identified the precise neurological basis of thujone’s mind-altering effect - namely, that it blocked the brain’s receptors for gamma-aminobutyric acid, a natural inhibitor of nerve impulses, and thus caused neurons to fire too easily, with an excitatory effect that could lead to seizures. The researchers had made their observations from studying laboratory mice and fruit flies that had been fed alpha-thujone. However, the study took for granted the thujone content in absinthe. The same year, Breaux, using gas chromatography, tested some pre-ban absinthe and found that it contained practically no thujone. He was astonished. “Everything I had learned had suddenly just fallen down” he recalls. He ran the tests again and came up with the same numbers. Then he ran similar tests on the absinthe that he had distilled himself; it, too, contained practically no thujone. Evidently, whatever thujone was present in the macerate did not make the journey out of the alembic, up the swan’s neck, and down into the final distillate. “If you make absinthe the way you’re supposed to, it’s not even there,” Breaux said. To his delight, his absinthe was legal according to the revised French law. Five years after this discovery, the results have been independently corroborated by other studies. The thujone, Breaux says, “stays in the pot.”
Breaux dipped a small champagne flute in the newly colored distillate, into which he then poured a small quantity of water. The absinthe louched in the glass - the water releasing herbal oils that turned the drink’s clear, deep green to an opalescent peridot flecked with amber. He held the glass to the light with evident satisfaction. “People just can’t believe that color is natural,” he said, “But it is.”
Learning his elbows on the rim of the vat, Breaux handed me a glass, and watched as I drank. There was a dark, heady taste of mint offsetting the natural sweetness of anise; there were bold herbal, grassy floral notes, the slightest hint of spice, and a cloudy hint of bitterness, more a mild astringency than anything I remembered from my session sawing wormwood earlier that morning. “That’s absinthe,” Breaux said.