Reply #11: Here is what they (the makers of Chaser) say

[dr.strangelove]

Congeners are the byproducts of the fermentation process that give alcoholic beverages their aroma, color and flavor. When congeners enter your bloodstream, your immune system eliminates them by releasing proteins called cytokines. This surge of cytokines causes inflammation leading to headache, nausea and body aches. This powerful reaction to alcoholic beverages can turn a night of celebration into a morning of misery. But Chaser caplets attract and absorb congeners before they have a chance to do their damage helping you wake up refreshed.


I don't know if that is just bullshit.