Stout
Ireland / UK
Roasted barley contributes melanoidins and Maillard byproducts. Many stouts use nitrogen plus CO₂ blend. Some imperial stouts add lactose ("milk stouts") — not vegan.
- Ingredients / botanicals
- pale malt, roasted barley, hops, ale yeast
In its favor
- ✓Lower ABV in dry stout styles (e.g. Guinness ~4.2%)
- ✓Filling = slower drinking
What to watch
- !Roasted malt compounds add to congener load
- !Milk stouts contain lactose
Factor by factor
Congeners Moderate ▾
Byproducts of fermentation (methanol, acetaldehyde, fusel alcohols). Strongly linked to hangover severity; darker, less-distilled spirits carry more.
Histamines High ▾
Produced by bacteria during fermentation/aging. Trigger flushing, headaches, congestion in sensitive drinkers. High in red wine, beer, aged spirits.
Polyphenols Moderate ▾
Plant compounds with antioxidant activity. Slightly protective at low doses but at high concentrations may worsen hangover via tannin/quercetin reactions.
Sulfites Low ▾
Preservatives (SO₂) added to wine and some beers. Common trigger of headaches, asthma, and allergic-type reactions.
Tannins Moderate ▾
Astringent polyphenols from skins, seeds, barrels. Bind proteins, slow alcohol clearance, and aggravate dehydration-style symptoms.
Sugar Moderate ▾
Residual sugar amplifies hangover via blood-sugar swings and dehydration. Liqueurs and cocktails are the main offenders.
Additives Low ▾
Colorants, flavorings, glycerin, propylene glycol, sorbates. Cheap spirits and ready-to-drinks often hide these in trade-secret formulas.
Stout sits between Pilsner and IPA on hangover load. The dark malts add Maillard chemistry that the body has to clear.