Dave — 2026-03-25
Does IMPOSSIBREW actually work? An honest answer after 3 months
I was sceptical too. Does the ashwagandha and L-theanine in IMPOSSIBREW actually do anything? I tested it properly. Here's what happened.
Let's get the obvious question out of the way: does IMPOSSIBREW actually do anything, or is it just expensive alcohol-free beer with a nice story?
I asked the same thing before I bought it. I'd read the marketing. "Feel the effects without the alcohol." Ashwagandha. L-theanine. I've seen enough supplement brands promise the world and deliver nothing to be deeply suspicious.
So I tested it. Not in a lab. In my kitchen, on Tuesday evenings, for about three months.
Here's my honest answer.
What's actually in it
Two active ingredients: L-theanine and ashwagandha.
L-theanine is the one that does the most work. It's the compound in green tea that takes the edge off caffeine - why you don't get the jittery crash from tea that you get from a strong coffee. It promotes a state they describe as "calm alertness." More relaxed, still switched on. Clinical studies back this up - it's not snake oil.
Ashwagandha is an adaptogen. Been used in Ayurvedic medicine for centuries, and the modern research on stress and cortisol reduction is fairly solid. Short-term: mild relaxation. Long-term: accumulates. The effect is real but subtle.
The question is whether there's enough of either in a can of beer to actually notice anything.
What I actually felt
First can: nothing obvious. But I wasn't sure I was expecting anything.
By week two, I noticed I was reaching for IMPOSSIBREW on evenings I'd normally have cracked open something proper. Not because it tasted incredible (it's genuinely good, but that's not the point), but because I felt like I was still doing something. Still unwinding. Still transitioning out of work mode.
That's the thing. The ritual of a cold beer at 6pm isn't really about alcohol. It's about signalling to your brain that the day is done. IMPOSSIBREW seems to do that job.
Whether it's the L-theanine working, or just the act of having a drink, I honestly can't say definitively. Probably both. But the end result - feeling more relaxed by 7pm than I would have done with just a Coke - seems real.
IMPOSSIBREW themselves cite a study where 84% of people felt more relaxed drinking it. That tracks with my experience.
The sceptical take
Here's what I'll admit: if you're expecting the effect of two pints of lager, you won't get it. That's not what this is.
If you're looking for an exact replacement for the buzz of alcohol - same feeling, same intensity - IMPOSSIBREW will disappoint you. Nothing does that.
But if you're moderating, trying to have fewer rough mornings, or just want something to do with your hands in the evening that isn't sparkling water - the L-theanine in IMPOSSIBREW does provide a gentle, noticeable effect that a standard AF beer does not.
The difference between IMPOSSIBREW and Heineken 0.0, Lucky Saint, or Peroni AF? Those are beer-flavoured water. They taste fine. They do absolutely nothing. IMPOSSIBREW does something small and real.
Is it worth the price
It's about £2 a can. Heineken 0.0 is £1 or less.
If you want pure taste, Heineken is fine and cheaper. If you want the L-theanine effect, you're paying the premium for that.
For me, it's worth it on evenings where I'd otherwise have had 2-3 real drinks. One or two IMPOSSIBREW instead of a bottle of wine costs about the same and I sleep better.
Bottom line
Does it work? Yes, with caveats.
It's not magic. It's not the same as a proper drink. But the L-theanine and ashwagandha do provide a mild, real relaxation effect that makes it different from every other AF beer on the market.
If you're moderating and want an AF beer that actually does something rather than just tasting like flat lager, IMPOSSIBREW is the only one I've found that delivers on that.
If you're sceptical, try a mixed pack first. Less commitment, you get the IPA (the best one), and you can decide whether the effect is real for you.
Common Questions
Does IMPOSSIBREW contain enough L-theanine to actually work?
IMPOSSIBREW doesn't publish exact mg figures publicly, but L-theanine has a noticeable effect at doses of 100-200mg. The relaxation effect I experienced was consistent enough over three months that I'm confident there's a meaningful dose in there.
How long does it take to feel the effects of IMPOSSIBREW?
In my experience, about 30-40 minutes. L-theanine typically takes 30-60 minutes to peak. Don't crack one open and expect to feel something in five minutes - it's not alcohol.
Does IMPOSSIBREW work if you don't drink alcohol?
Yes - the L-theanine and ashwagandha work regardless of whether you normally drink. If anything, you might notice the effect more clearly because you don't have a reference point for alcohol effects.
Which IMPOSSIBREW flavour is best?
The Triple Hopped IPA, no contest. The Hazy Pale Ale is solid. The Lager is fine. Start with the IPA.
Is IMPOSSIBREW better than other functional AF beers?
It's the only functional AF beer I've found that's both genuinely drinkable and has real active ingredients. Most alternatives either taste medicinal or have such small doses they do nothing. IMPOSSIBREW is the only one that's got the balance right.
I've been drinking IMPOSSIBREW lately - the Triple Hopped IPA is the best one (genuinely, not just saying that). Saves you a tenner on your first order if you want to try it.