New stack · Energize × HydraFuel
Made in NZEnergize brings energy, focus and pump. Hydrafuel brings the carbs and sodium to keep the tank topped up. Built for back-to-back sessions, long lifts and Hyrox-style hybrid work and we swear the flavour combo hits.
Two bags, one bottle. Rocketfuel is the stack the crew started mixing themselves. Energize for the pump and the focus, HydraFuel for the carbs and sodium that keep the tank topped up. Built for back-to-back sessions, long lifts and Hyrox-style hybrid work. One scoop of each in 500ml. Shake. Go.
From Energize (1 scoop): 6g L-Citrulline, 200mg natural caffeine, 3g Beta-Alanine, 2g Betaine, B-vitamins, natural Raspberry flavour.
From HydraFuel (1 scoop): 30g dual-pathway carbs (maltodextrin + fructose, 2:1), 530mg sodium, 300mg potassium, 150mg magnesium, natural Tropical flavour.
Full ingredient panels are on each individual bag. Made in New Zealand.
1. One scoop Energize Raspberry.
2. One scoop HydraFuel Tropical.
3. 500ml cold water. Shake. Go.
Sip 15–20 min before training and through the first half of the session. For longer work (90+ min) keep a second bottle of plain HydraFuel ready to top up.
Per stacked serve (1 scoop Energize + 1 scoop HydraFuel, in 500ml water): 6g L-Citrulline, 200mg caffeine, 3g Beta-Alanine, 30g carbs, 530mg sodium, 300mg potassium, 150mg magnesium. ~130 kcal. Full per-bag panels included with each product.
NZ orders ship within 1 business day; free over $100, $4.99 flat under. Not happy? Send it back within 30 days.
Why it works
Most people stack a pre-workout with water and wonder why their legs go dead at minute 40. The pump's gone, the carbs are gone, the salt's gone. Rocketfuel keeps all four taps open, citrulline for the blood flow, caffeine for the focus, carbs for the fuel, sodium for the hydration. The whole session, not just the first ten minutes.
6g of L-Citrulline opens the taps vasodilation through the arginine-NO pathway. Stack Hydrafuel on top and the blood-flow window stays open all session because the carbs and sodium keep the substrate flowing. Most pre-workouts dose 3g of citrulline and wonder why it doesn't land. We dose for the work.
200mg of natural caffeine for the kick, clean, no jitter, no comedown. 30g of carbs in the bottle so you don't bonk at minute 45. The caffeine fires the engine; the carbs keep it running. Sustained output, not a 20-minute spike followed by a wall.
Raspberry Energize + Tropical Hydrafuel. We've tried every combo. This one goes down clean even at the back end of a long session, when most flavours start tasting like cough syrup. The crew started calling it Rocketfuel. The name stuck.
The pour
No timing tricks. No two-bottle juggling act. One scoop of each, half a litre of cold water, and you're done, built to fit in a gym bag, a transition tray or a kitchen bench at 5am.
Why the stack works
Most pre-workouts spike you for twenty minutes and leave. Most electrolyte mixes keep you topped up but never lift the ceiling. Rocketfuel runs four pathways at once. That's the whole point.
Converts to arginine, then to nitric oxide. NO opens blood vessels. More blood means more substrate to the muscle and that's the pump you actually see. 6g is the dose research backs. Most pre-workouts use 3g and call it a day.
Blocks adenosine, the molecule that tells you you're tired. 200mg lands clean. Enough to fire the engine, not enough to fry it. Paired with carbs in the bottle, the comedown that usually follows just… doesn't.
Your muscles hold ~90 minutes of hard glycogen at 1g/min. After that, pace drops and legs get heavy. 30g per bottle in a 2:1 maltodextrin-to-fructose ratio keeps the tank topped so the wall never shows up.
Sodium needs glucose to cross the gut wall fast. Water follows the salt in. That's why the combo absorbs faster than either alone — same mechanism doctors use to treat dehydration in hospitals.
Why stack instead of two bottles
Citrulline opens the blood vessels. Caffeine and carbs flood through them. Sodium drags the water in to deliver it all. Run one without the others and you're leaving the work on the gym floor.
It's the difference between a 30-minute spike and a 90-minute session.
What's in the bottle
Combined dose per stacked serve (1 scoop Energize + 1 scoop HydraFuel, in 500ml water). Every actives line printed in full. No proprietary blends, no marketing-spec rounding.
| Energy (combined) | ~130 kcal |
| L-Citrulline | 6 g |
| Caffeine (natural) | 200 mg |
| Beta-Alanine | 3 g |
| Carbohydrate | 30.3 g |
| of which fructose | 10.0 g |
| Sodium | 530 mg |
| Potassium | 300 mg |
| Magnesium | 150 mg |
Citrulline + caffeine without carbs spikes you and crashes you. Carbs + sodium without citrulline tops up your tank but never lifts your ceiling. The science only works when all four pathways are running at once, vasodilation, focus, glycogen, and absorption in a window that lines up with your session, not before or after it.
Solo vs Stacked
A pre-workout on its own gives you 20 minutes. Electrolytes on their own give you hydration without horsepower. Rocketfuel runs both — here's the side-by-side against a typical pre alone.
Built for the bottle
We didn't invent this stack our crew did. They started double-scooping in the gym kitchen months ago. We just bagged it, dialled the flavours, and made it the easiest way to buy them together.
Why we made it
"They told me I'd never run again. So I did.
KYRO is what that journey built,
because I ran."
Two ACL tears and a year I almost lost. I built KYRO between recovery and the Ironman 70.3 World champs start line. Rocketfuel is what I ran the back half of those long days on. For everyone making their own version of that journey — chasing a podium, or just showing up for yourself.
Reviews
Used to take Energize then chase it with HydraFuel ten minutes in. Now it's one shake, one bottle. Held strong all the way through the wall ball station. The crew were right — Rocketfuel is the name.
Lift in the morning, ride at lunch. The combo means I can stack both without running out of legs by the second session. The pump from citrulline + the carbs in the bottle is unreal.
FAQ
Yes. Energize and Hydrafuel are both sold on their own. The Rocketfuel bundle just gives you both together at a better price, and a clear playbook for how to stack them. If you only ever train for under 45 min with no heat, you'd probably get by on Energize alone.
200mg of natural caffeine — about the same as a strong long black. Clean kick, no jitter for most people. If you're caffeine-sensitive, take it earlier in the day and skip the afternoon coffee.
Raspberry Energize + Tropical HydraFuel is the crew pick — that's the combo we'd put on the bottle if we had to pick one. Both flavours of each are designed to layer cleanly, so any combo works. Pink Lemonade + Raspberry is the other crew favourite.
Because pre-workout and endurance fuel get used differently. Some days you want carbs and sodium without the caffeine (afternoon long ride, late session, second workout). HydraFuel as a standalone earns its place. Stacking gives you both worlds without locking you into one bottle.
It's built for it. The four-pathway profile — pump, focus, fuel, sodium — is exactly what hybrid sessions chew through. We've had Hyrox athletes running this stack for the back half of brick sessions. Works the same for a long lift, a CrossFit class, a triathlon brick or a heavy gravel ride.
Yes — 10% off every order, shipped on your schedule. Skip, pause or cancel anytime. Most people land on a monthly cadence once they're stacking 3–4x a week.
If the stack isn't for you, send both bags back within 30 days for a full refund — even if they're open. No restocking fee, no questions.
Complete the routine
