Alkylresorcinol

[5] Among the plant sources, the shell oil of cashew nut (Anacardium occidentale L.) has the highest amount of ARs, which consists of 20% phenolic lipids.

In the case of cereals, the hyaline layer, inner pericarp, and testa showed the highest amounts of AR.

[15] Increasing evidence from human intervention trials suggests that they are the most promising biomarker of whole grain wheat and rye intake.

They were previously found in a well-preserved Bronze Age wooden container from Switzerland,[23] and coarse ware vessels from a Roman cavalry barrack at Vindolanda.

However, if recoverable, analysis of these phenolic lipids in archaeological contexts is valuable as it can help explain the uptake and spread of cereal processing of past communities in particular regions.