Dandelion and burdock originally fermented. (alcoholic) A form of root-beer. (Sumbdy found a good use for weeds.
Both dandelion and burdock strong diuretics so it has enjoyed a long reputation as a health drink, particularly substituting for sarsaparilla after one of the ingredients of the latter shown to be carcinogenic.
But, here is what Wiki has to say:
"The "dandelion and burdock" drink for sale in many retail outlets rarely contains either plant. The retail drink is often carbonated, containing artificial sweeteners and flavourings. Some supermarkets sell the drink with "real plant extracts" with a more faithful flavour than the ones made with artificial flavourings
Fentimans, a beverage company based in the United Kingdom, offers a version of the naturally brewed dandelion and burdock drink, containing extracts of both plants (although its main ingredients are sugar and pear juice concentrate).
The last of the UK's original temperance bars, Fitzpatrick's in Rawtenstall, which opened in 1890, still produces its dandelion and burdock to an original recipe brought over from Ireland at the end of the 19th century."