Collider vs Impossibrew: an honest comparison

If you want a non-alcoholic beer that does a bit more than simply leave the alcohol out, two UK names come up fast: Collider and Impossibrew. Both brew alcohol-free beer with a blend of functional ingredients, and both are aimed at a calmer, more relaxed evening without the hangover. So how do they actually differ, and which is right for you?

We make Collider, so read this with that in mind. We have kept every figure below accurate and checkable, and we have stuck to the things that genuinely separate the two beers rather than marketing noise.

Figures for Impossibrew are taken from their own website and independent sources in September 2026.

The short version

• Both are alcohol-free functional beers (0.5% ABV or less) built around L-Theanine and Ashwagandha.
• Collider adds Lion's Mane, the functional mushroom, which Impossibrew's blend does not contain. Our full Unwind Blend is 400mg and every ingredient is named on the can.
• Collider is lighter: 36 calories in a 330ml can, against about 75 in a 440ml can of Impossibrew's lager, and fewer calories per 100ml too.
• On taste, an independent reviewer who tried both ranked Collider top, preferring our Session IPA.

The differences that actually matter

Why people choose Collider

• The only one of the two with Lion's Mane. Both beers use L-Theanine and Ashwagandha, but only Collider's Unwind Blend adds Lion's Mane, the functional mushroom studied for focus and cognition.
• A bigger, fully named dose. Our Unwind Blend is 400mg, against 375mg in Impossibrew's Social Blend, and we name all three of its ingredients.
• Lighter. 36 calories in a 330ml can, against about 75 in a 440ml can of Impossibrew's lager. Per 100ml, that is about 11 calories versus 17.
• Less per can. Our cheapest can is from about £1.87 in a subscription bundle, against £2.125 for Impossibrew's cheapest can on subscription.
• Made beer first. Taste is what our reviewers mention most, and an independent 2026 taste test of both brands placed Collider on top.
• Rated 4.8 out of 5 by 817 of our own customers in on-site reviews.

What's in the can, and why

Collider's Unwind Blend is 400mg of three functional ingredients, each backed by published research:

• Ashwagandha (backed by RCTs): the adaptogen with the strongest evidence here. Randomised, placebo-controlled trials show it lowers cortisol and reduces stress (Chandrasekhar et al., 2012; Lopresti et al., 2019).
• L-Theanine (backed by RCTs): the calming amino acid in green tea. It raises alpha brain-wave activity, the signature of relaxed focus, without drowsiness (Nobre et al., 2008), and reduces stress over time (Hidese et al., 2019).
• Lion's Mane (emerging research): the functional mushroom Impossibrew leaves out, studied for focus and cognition (Mori et al., 2009).

So which should you buy?

• Choose Collider if you want the fuller functional blend with Lion's Mane, the lower calories, and a beer built to taste like the real thing.
• Either way, taste is personal. Collider comes with a 30 day money-back guarantee, so trying it costs nothing.

FAQs

What is the difference between Collider and Impossibrew? Both are alcohol-free functional beers using L-Theanine and Ashwagandha. Collider adds Lion's Mane, names all three ingredients on the can in a 400mg Unwind Blend, and has fewer calories: 36 in a 330ml can, versus about 75 in a 440ml can of Impossibrew's lager.

Does Impossibrew contain Lion's Mane? No. Impossibrew's website lists its Social Blend as L-Theanine, Ashwagandha, Vitamin B1, soluble plant fibres and various plant extracts. Of the two beers, only Collider's Unwind Blend contains Lion's Mane.

Do functional non-alcoholic beers actually work? The key ingredients are backed by published research. Ashwagandha and L-Theanine have randomised controlled trials behind them for stress and calm. Effects build gently and vary from person to person.

Are they both alcohol-free? Yes. Both are sold as alcohol-free: Collider is under 0.5% ABV and Impossibrew lists its beers at 0.5% ABV, a trace amount that will not get you drunk.

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Sources: Chandrasekhar et al. 2012, Indian J. Psychol. Med. · Lopresti et al. 2019, Medicine · Nobre et al. 2008, Asia Pac. J. Clin. Nutr. · Hidese et al. 2019, Nutrients · Mori et al. 2009, Phytotherapy Research.