The watch says slower
You train more and push harder, and your splits refuse to move. The fitness is there. The output is stuck.
With VO2 Max
Splits that finally move.
Legs feel fine.Lungs on fire.Find yournext PR.
You are fit enough to go faster. The ceiling is how much oxygen your body can take in, deliver and burn each minute. Fortify VO2MAX makes breathing feel cleaner from your first serve, and one bottle covers a 4‑week block of the training that raises the ceiling.
5.0Verified store rating
Fortify VO2MAX
Caffeine-free · 30 serves · one 4‑week block
$59.95about $1.99 per session
Feel it in your first serve or we'll credit every dollar back
Ships from Brisbane · Free shipping over $150 · Save up to $20 with stacks below
01
5.0★
Verified store rating
02
Serve 1
Breathing feels cleaner
03
$1.99
Per hard session
04
0 mg
Caffeine. Train at 9pm
Four walls. One cause.
Every wall has another side
Lungs quit before legs
Your muscles have more to give, but every breath comes up short, so you back off before they get the chance.
With VO2 Max
Finish with air to spare.
New shoes, same pace
Carbon plates and coaching apps trim seconds at the margins. Your engine sets the ceiling, and your gear leaves it untouched.
With VO2 Max
Upgrade the engine, not the accessories.
Redlined by minute three
The bar felt light in the warm up. Three minutes into the workout, acid floods in, breathing panics and the wheels come off.
With VO2 Max
Hold the pace without the panic.
All four are the same problem wearing different outfits: your demand for oxygen outrunning your supply. Coaches call the supply ceiling VO2 max, and until you raise it, every one of those walls stays exactly where it is.
Your engine has a pipeline
Every rep and every stride runs on the same supply chain. Air comes in, oxygen rides your blood to the muscle, and mitochondria burn it for power. VO2 max is the width of that pipeline. When demand passes it, the debt gets paid in acid, heart rate and panic.
Pipeline
100%
Heart rate
126 bpm
01
Intake
Air moves through your airways into the lungs. Tight, irritated airways mean every breath delivers less than it should.
02
Delivery
Oxygen loads onto red blood cells and rides to the working muscle. Circulation and hydration set the pace.
03
Burn
Mitochondria combine oxygen with fuel to make clean, aerobic power. More burn means more watts.
04
The ceiling
Demand passes supply. The pipe chokes, acid floods in, heart rate spikes and pace collapses. This is the bottleneck.
The fix
Widen the pipe
Fortify VO2MAX works on intake, delivery and burn in one caffeine-free serve, so every hard session pushes the ceiling higher.
Scroll to run the engine
Why progress stalls
Each of these buys something real. Each one also leaves the pipeline exactly as narrow as it was.
More volume
What it buys
Builds durability, resilience and a base you will need.
Where it stops
Adaptation is slow, and easy miles repeated at the same effort mostly re-run the ceiling you already have.
More caffeine
What it buys
Masks effort and borrows energy for an hour.
Where it stops
Heart rate climbs, the crash arrives, and the pipeline underneath is untouched. Stimulants rent intensity. They never buy capacity.
More gear
What it buys
A few percent of efficiency from shoes, sensors and fabric.
Where it stops
The $300 shoes move you along the curve. The engine producing the watts is the curve, and it stays the same size.
The protocol is free.
it's here.
VO2 max responds to training. These three inputs do most of the work, and they cost nothing. The full breakdown lives in our endurance guide.
Read the full endurance guide01
VO2 intervals, twice a week
Four rounds of four minutes at a hard but repeatable effort, with three easy minutes between. This is the session that widens the pipeline.
02
Zone 2 base, most other days
Conversational pace volume grows the mitochondria and capillaries that do the burning and delivering. Boring on purpose. It works.
03
Six to twelve weeks of consistency
Measure pace at a fixed heart rate, or watch your VO2 estimate trend. The athletes who improve are the ones still doing intervals in week nine.
Fortify VO2MAX exists to make every one of those sessions count: clearer airways going in, steadier focus during, and better fuel access when the intervals get ugly.
Six ingredients, one pipeline
$59.95about $1.99 per session
- Intake
Peppermint oil
Menthol supports clear, open airways so each breath moves more air with less fight.
- Drive
Alpha-GPC
Feeds acetylcholine production for sharper focus and a stronger mind-to-muscle signal when fatigue starts fogging decisions.
- Burn
Acetyl L-Carnitine
Shuttles fatty acids into the mitochondria so working muscle keeps producing energy aerobically instead of drowning in acid.
- Fuel
MCT oil
Converts rapidly to ketones, opening a second clean fuel line for the engine when glycogen runs low late in a session.
- Deliver
Grape seed extract
Antioxidant support for circulation, helping the delivery leg of the pipeline and post-session recovery.
- Hydrate
Glycerol
Helps cells hold water so blood volume, cooling and delivery hold up deep into hard work.
Zero caffeine
Train at 9pm, stack it with the pre-workout you already love, and skip the crash. All signal, no static.
Simple timing
Take it around 30 minutes before your session with water. Interval days are where you will notice it first.
Bex lovin' the VO2
Athletes who found their air
5.0
Average rating
Community-approved performance
5.0 from recent customer reviews
Three ways to attack it
Start with a single bottle or commit to the block. Every stack is built around Fortify VO2MAX and the training protocol above, and stack savings apply automatically in your cart. No code needed.
Ships from Brisbane / Free shipping over $150
Stack 01
The Test Run
One bottle. Thirty sessions.
Feel what a clear airway and a steady head do to your hardest interval day. The place to start if you want proof before you commit.
Fortify VO2MAX
Stack total
$59.95
- 0 mg caffeine. Train at 9pm.
- 30 serves. One 4-week block.
Stack 02
The Engine Builder
Attack the bottleneck from both ends.
Fortify VO2MAX works on intake and drive while extra Acetyl L-Carnitine doubles down on mitochondrial fuel transport. Built for a 6 to 12 week block.
Fortify VO2MAX
Acetyl L-carnitine
Stack total
$119.90$109.90
Save $10Applied automatically in cart
Stack 03
The Full System
Breathe. Burn. Hydrate. Recover.
The full engine room: VO2MAX before the session, Hydroboost electrolytes and aminos through it, ALCAR keeping the mitochondria fed all block long.
Fortify VO2MAX
Acetyl L-carnitine
Hydroboost
Stack total
$179.85$159.85
Save $20Applied automatically in cart
Unlocks free shipping
Asked before every first order
Does it contain caffeine?
No. Fortify VO2MAX is completely caffeine free. That means you can take it before evening sessions, stack it with the pre-workout you already use, and skip the spike-and-crash cycle stimulants bring.
When do I take it?
Around 30 minutes before training, with water. Interval and threshold days are where the airway and focus support earn their keep.
Will I feel it in my first session?
The menthol airway effect and the focus support are acute, so most people notice breathing feels cleaner from the first serve. The engine itself grows over weeks of training. The formula makes the sessions better. The sessions make you faster.
Do I still have to do the training?
Yes. Nothing in a bottle replaces VO2 intervals and Zone 2 volume. Fortify VO2MAX is built to raise the quality of that work, and the results compound from there.
Who is it for?
Runners chasing target times, hybrid and CrossFit athletes who redline mid workout, team sport players who fade late, and anyone whose breathing gives out before their muscles do.
Can I take it every day?
It is formulated to be taken before sessions, and many of our athletes use it daily across a training block. If you have a medical condition or take medication, check with your health professional first.
The bottleneck is trainable
Your legs are ready. Give them the oxygen.
The fine print
- 1This page is general information for healthy adults and is not medical advice. Speak with a health professional before starting any supplement, especially if you are pregnant, breastfeeding, taking medication, or managing a medical condition.
- 2Supplements support training. Individual results vary with training protocol, consistency, sleep, and nutrition.
- 3Free shipping applies to eligible orders over $150 under the current shipping rules and is confirmed at checkout.
- 4Stack savings are applied automatically in the cart when every product in the stack is added together. Discounted stack pricing shown assumes the automatic discount applies; if it is unavailable, products are charged at their individual prices. Stack savings may not combine with other promotions or discount codes.
- 5First-serve promise: claim within 30 days of delivery on your first eligible Fortify VO2MAX order. The remedy is store credit equal to the amount paid; the credit does not expire. One claim per customer or household.