weaponize your coffee.
A caffeine-free performance syrup for the coffee you already drink. Three pumps in your first cup. Sharper focus, smoother energy, no crash.
£49.95
See the full stackFounding batch. No payment today.
coffee works. until it doesn't.
The energy spike. The jitters. The 11am crash. Most fixes try to replace your routine. Battle Syrup upgrades it.
locked-in focus.
Cognizin citicoline leads the formula, there for deep, uninterrupted work. Pantothenic acid contributes to normal mental performance.
alert, not jittery.
L-theanine keeps the profile smooth, so the energy feels dialled in rather than shaky. Magnesium contributes to normal psychological function.
energy that lasts.
Smooth, steady energy from the first sip onwards, not a bigger spike. A naturally low-sugar base means no sugar rush and no crash. Vitamin B6 contributes to the reduction of tiredness and fatigue.
we didn't build this to a price.
£49.95 for a coffee syrup deserves an explanation, so here it is.
Most of the price is the formula. Every active is the researched form, at the full dose. The kind most brands quietly shrink to protect their margin. Cognizin citicoline is the most expensive ingredient in the bottle. We dose it properly, so we never have to fake it.
The rest is staying power. A salted caramel you look forward to, three pumps into the coffee you already make. No pills, no powders, no new routine. Founding members also get the app, protocols and extras that turn one bottle into a whole morning system.
And most of it, you're already spending your money on. The syrup or sugar in your cup. The second and third coffees to get through the afternoon. The focus supplements in the cupboard, the app you pay for to stay on track. Battle Syrup folds them into the coffee you already make - one thing, not five.
It works out at about £2.60 a day. Weigh that against what a locked-in morning is worth to you.
- Killer Labs
inside battle syrup
Every ingredient in Battle Syrup is here for a reason.
Tap an ingredient to explore it
-
cognizin citicoline
The ProblemAttention has become a scarce resource. Most people spend the day switching between tabs, messages, meetings and emails. Something is always competing for your focus. The problem usually isn't a lack of stimulation. It's a lack of sustained attention. Coffee can make you feel awake. Staying focused on what actually matters is a different challenge.
Why It's HereWe included Cognizin Citicoline to support attention, concentration and cognitive performance, as part of a productive coffee ritual. Being alert is useful. Being able to point that attention where it matters is even more valuable.
What Research ShowsCognizin is one of the most studied forms of citicoline. Clinical studies have investigated its effects on attention, focus, memory and cognitive performance, with improvements reported against placebo.
250mg per three-pump serve -
electrolytes
The ProblemMost people blame caffeine. Almost nobody considers hydration. Picture your third or fourth coffee of the day, deep into work. Your energy and focus feel less reliable than they did that morning. Usually, more is going on than caffeine alone.
Why They're HereWe added magnesium, sodium and potassium to support hydration and electrolyte balance, the foundations that often get overlooked. They're not the most exciting ingredients in the formula. They're some of the most important.
What Research ShowsMagnesium contributes to electrolyte balance and normal nervous system function. Potassium contributes to normal muscle and nervous system function. Together, these systems affect everything from hydration to physical and cognitive performance.
Per serve: about 200mg magnesium bisglycinate (60mg elemental), 170mg sodium, 70mg potassium -
taste and the base
The ProblemMost functional products ask people to make a trade-off. Better ingredients. Worse experience. The result is often a product that gets used for a week, then slowly disappears into the back of a cupboard.
Our ApproachWe didn't believe performance and enjoyment had to be a trade-off. Most coffee syrups are pure sugar. Battle Syrup uses a naturally low-sugar base with prebiotic fibre instead - so it sweetens a salted caramel cup without the sugar spike or the crash. That's the same prebiotic fibre you'd normally find in a gut supplement, not a coffee syrup. And no artificial sweeteners.
Why It MattersConsistency compounds. The products that make the biggest impact are the ones people actually keep using, long enough for the benefits to add up. That's why we led with taste: to make Battle Syrup easy to use every day, so you get the most from it.
-
l-theanine
The ProblemEver finished a coffee feeling more stimulated than productive? More switched on than focused? Coffee is powerful. But for some people it comes with a trade-off: jitters, overstimulation, and a brain moving faster than you can steer it.
Why It's HereWe included L-Theanine to make the coffee experience smoother and more controlled. The goal wasn't to make coffee feel stronger. It was to make it easier to direct.
What Research ShowsResearch has looked at L-Theanine alongside caffeine. It reported better attention, and less susceptibility to distraction, than caffeine alone.
200mg per three-pump serve, 99% pure -
b vitamins
The ProblemThe goal isn't just to feel switched on. It's to stay switched on. You know the feeling: you start the day sharp, then reach for another coffee a few hours later. The momentum didn't last.
Why They're HereWe included B vitamins to support energy metabolism and everyday performance. The goal wasn't just a stronger start to the day. It was consistency all the way through it.
What Research ShowsSeveral B vitamins contribute to normal energy-yielding metabolism, normal psychological function, and the reduction of tiredness and fatigue. They play an important role in turning food into usable energy.
A full B-vitamin complex, eight vitamins per serve
3 pumps. that is the whole system.
Most performance products cost you something: pills to remember, powders to mix, a new routine to keep up. Battle Syrup asks for none of it. The hardest part of any supplement is remembering to take it. This one rides the routine you already have, so it's the one you'll actually keep.
shake well
A quick shake before you pour keeps the formula even through the bottle.
add three pumps and stir
Three pumps into your normal coffee, hot or iced. Stir it through.
drink it and lock in
Salted caramel in the cup, 13 active ingredients in your system, then get on with the thing that matters.
for those who move differently.
Most people react to the day.
Killers control it.
The best operators aren't always the smartest.
They're the ones who can sit down, lock in and produce something that matters.
They don't rely on willpower alone.
They stack the odds in their favour.
This isn't a wellness product.
It's Weaponry.
one bottle. the whole stack.
Stop juggling six bottles and a pill organiser. It's all in the syrup - plus the app to build the habit around it.
- Cognizin citicoline 250mg, the studied focus active most brands under-dose£18
- L-theanine 200mg, smooth focus alongside your caffeine£8
- B-vitamin complex eight vitamins for steady energy£10
- Prebiotic fibre, low-sugar base the reason there's no sugar crash£10
- Magnesium bisglycinate the absorbable form£4
- Electrolytes sodium and potassium£4
- Premium salted caramel syrup 500ml, pump bottle£6
- PlusFree for the Founding 1000 - the system that makes it stick.
- The Killer Labs app tracking, focus tools and protocols - free for life for the Founding 1000, subscribers only after launchFREE (£15/mo)
- The Killer's Morning Protocol our exact first-90-minutes systemFREE (£29)
- Founding Focus Sessions guided deep-work mode inside the appFREE (£15)
- The Killers' Room private group, direct line, first dibs on what's nextFREE
Every figure is priced against the premium brands we match - no inflated numbers. Bought separately, it's £60+ a month and a cupboard of bottles. And the rest - the syrups, the extra afternoon coffees, a focus app - you already pay for. Battle Syrup just folds it into one.
You can't put money on your focus.
Everything a focus stack gives you. None of what makes you quit one.
- No capsules to swallow
- No powders to mix
- No refined sugar
- No artificial flavours
- No 11am crash
- No new routine to keep up
It goes in the coffee you already make. These founding terms close when the batch fills.
your number
Founding bottles are numbered. Yours is printed on it and never reissued.
always first
Whatever Killer Labs releases next, the Founding 1000 get it first.
you shape it
Founding feedback shapes the next run. What you tell us goes into the product.
the founders' guarantee
Finish the bottle. If your mornings aren't sharper, we refund you in full - and you keep the app.
reports from the first wave.
Verified early-access testers. What they kept saying, unprompted: longer, calmer stretches of deep focus - and needing fewer coffees to get through the day.
Verified tester9/10 I could tell a difference from the start - more focused, and I wasn't getting stressed as easily. I regularly got into 2-3 hour deep work sessions without much distraction. A noticeable difference to my productivity.
Verified tester9/10 I used to pour over ingredients and formulas for a living. This syrup genuinely gives an edge to the day.
Verified tester10/10 Normally I'd look at fifteen tasks and get one or two done. With this I just ticked them off - none of that holdback of a really long day ahead.
Verified tester10/10 Going from four energy drinks a day to one is a massive improvement. I'm sleeping better and I'm more focused at the gym.
Verified tester7/10 I'd usually need another coffee around 2pm - with the syrup I didn't. Even on a 13-hour shift, I wouldn't feel the crash until I got home.
Verified tester8/10 Being a train driver on shifts, staying focused all day is everything - this ticked all those boxes. I'd reach for it over a Red Bull or Monster.
Verified tester8/10 I normally do 2-3 espressos a day - with this I didn't feel the craving for more coffee, and the taste is delicious.
Verified tester8/10 It rounds off the caffeine buzz into something more focused and long lasting. The sweetness is subtle and takes the edge off the bitterness.
Verified tester9/10 It takes the bitterness out and I feel more level - no peaks and troughs with energy. I add it to my morning protein coffee and can already see it being part of my routine.
Buy it, try it, and thank me later. It's the missing ingredient to a perfect coffee.
asked and answered.
what is battle syrup?
A caffeine free performance syrup for the coffee you already drink: Cognizin citicoline and L-theanine in a salted caramel syrup. Three pumps into your first cup for sharper focus and smoother energy, without the crash.
does it replace my coffee?
No. Battle Syrup contains no caffeine of its own. It rides with your coffee, it does not replace it.
what does it taste like?
Salted caramel. It reads as a premium coffee syrup, not a supplement. Three pumps sweeten a standard cup about as much as a regular syrup would, on a naturally low-sugar base.
who is it for?
Coffee drinkers who want their ritual to work harder. It was built for people who feel the spike and pay for it later.
what does reserving commit me to?
Nothing. Reserving holds your founding access. Payment only happens when the batch opens, and only if you choose to buy.
why £49.95?
Most of the price is the formula. Every active in Battle Syrup is the studied form at a proper dose - the kind most brands quietly shrink to protect margin. A plain caramel syrup is £8 a bottle. The other £42 is the formula. Per day it works out at about £2.60. And most of that you already spend - on the syrups, the extra afternoon coffees you buy to keep going, and a focus app. Battle Syrup just folds it into one.
how long does a bottle last?
500ml is approximately three weeks at three pumps once daily. Heavy coffee drinkers using it in more than one cup will get through it faster.
what if i don't keep it up?
That is the whole point of building it into your coffee. There is no new habit to maintain, no pills to remember, no powder to mix. You already make the coffee - three pumps and you are done. It is the supplement you will actually keep using.
is the app included?
As one of the Founding 1000, you keep the Killer Labs app free for life, even on a one-time bottle. After launch it is for subscribers only.
when does the batch open?
Production is not yet booked. Battle Syrup will be at least 3 months away and may take longer. The Founding 1000 will be notified first when timing is confirmed, before anyone is asked to buy.
your coffee already has your loyalty. make it earn it.
You're not buying a bottle. You're buying a few weeks of locked-in mornings, for about £2.60 each - in the coffee you already drink.
Nothing to swallow, mix, or remember.
A food supplement. Not intended to diagnose, treat, cure or prevent any disease.