PEOPLE are only just realising the surprising ingredient that goes into making beer.
If you're currently doing dry January and excited for the first sip of your pint in a few weeks time, you might reconsider.
Whether you enjoy a mid-week sip or wait until the weekend, it's unlikely you think of all the ingredients in your glass.
But one element – which will definitely put you off if you're a veggie or vegan – is the swim bladder from fish.
Also known as isinglass, the form of collagen is used to make beer more attractive to drinkers.
It has been used in Brits' favourites since the 19th century and helps yeast sediment settle quicker.
However tiny particles of fish do end up left in the final drink.
Craft Beer & Brewing explains: "Isinglass is a traditional finings, a substance that causes yeast to precipitate out of suspension, leaving beer clear.
"Isinglass is derived from the swim bladders of certain tropical and subtropical fish."
Beer favourites such as Corona, Beck's and Budweiser do not contain the fishy element.
However, Carling, Foster's and Kronenbourg do.
Guinness does have elements of isinglass in it – but is working to make the drink more vegan friendly.
At the minute, the beer brewed in Australia, the Blonde American Lager and the Guinness sold in kegs is suitable for all.
These are the beers which are vegetarian and vegan friendly:
The beers that aren't vegetarian and vegan friendly:
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