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First chair to last chair,
powered by VKE.
FOCUS. FLOW. STAMINA. RECOVERY.
Superfuel your season. Veech Ketone Ester fuels your brain and your legs. Before first chair, between runs, and while you sleep at 9,000 ft.
Mountain performance enhancement
MONEY-BACK GUARANTEE.
1 Fuel. 4 Jobs.
One molecule. Your brain and your muscles both burn it.
Read the line and execute it. Sharper when it matters: 2 p.m. on the third day, when most people start making dumb mistakes.
PROOF: Reaction time held on VKE while placebo got 9% slower. Roca 2026 · see the chart ↓
In the moment. Alert and present. Not wired, not foggy, not thinking about lunch.
WHAT PEOPLE SAY: Quiet and alert focus. More chill than caffeine.
Noticeable leg endurance, guaranteed. D-BHB is the same emergency fuel your body makes to keep you sharp when there’s no food coming in. Now you drink it, without starving your body into making it.
WHAT IT PROVIDES: D-BHB – the same emergency superfuel your body makes when fasting.
RECOVERY
Legs for day three.
After a hard day, VKE helps refuel your muscles and improves sleep – including the sleep you don’t get well at altitude.
PROOF: Robberechts 2023 · Holdsworth 2017 · details ↓
More Energy
= More Fun
Caffeine will let you down.
VKE is real energy now, on-demand.
People describe it as being focused, alert and present on the hill – enhanced flow. No jitters or crash like caffeinated energy drinks. Just clean energy and clarity.
Still want your coffee? Keep it. In a human study, Ke4 plus caffeine was sharper than Ke4 alone – and placebo got slower.
WHAT PEOPLE TELL US. NOT A MEASURED RESULT. THE MEASURED RESULTS START BELOW ↓
First tracks don’t wait
for you to recover.
Be ready tomorrow.
Larger amount when you get off the hill to refuel. Small amount before bed to recharge.
Shot legs on day 2 or 3 are a bummer. In athletes, VKE after a strenuous day improved sleep efficiency and counteracted the REM drop – sleep is where your next day starts.
No added caffeine to complicate a 6 a.m. alarm.
PROOF: Robberechts et al. 2023 · details ↓
Built for DARPA.
Made to enhance soldiers’ performance when it matters most.
In 2003, DARPA’s Metabolic Dominance program went looking for a food that would hold off fatigue and keep soldiers’ physical and mental performance up through days of intense operations. It funded Dr. Richard Veech’s lab at the National Institutes of Health to build it. The result was the Veech Ketone Ester.
Same molecule. Now it’s in your jacket pocket.
HISTORICAL RESEARCH FUNDING. DARPA AND THE DEPARTMENT OF DEFENSE DO NOT ENDORSE KETONEAID.
Proven outcomes.
Measured in human VKE studies:
Placebo got 9% slower on a reaction test. VKE held.
LAB TASK-SWITCHING TEST · ROCA 2026On carbs alone, multitasking errors rose by 1.8 under fatigue. With VKE, no rise in errors from exhaustion.
SHUTTLE-RUNNING STUDY · EVANS & EGAN 2018Sleep efficiency went up and the REM drop was counteracted.
POST-EXERCISE SLEEP STUDY · ROBBERECHTS 2023Smaller blood-oxygen drop than placebo breathing 20,000 ft air.
SIMULATED-ALTITUDE STUDY · MCCLURE 2024And you’ll still have legs for the run back to the car.
Placebo got 9% slower.
VKE didn’t.
Late edges, late turns, the tree you saw a half-second late. Reaction time is the part of skiing you can’t train in the gym. 25 adults, a 20-minute mental-fatigue task, reaction time before and after. Lower is faster.
- Ke4
- Placebo
- Ke4 + caffeine
GROUP MEANS, TABLE 1. TASK-SWITCHING REACTION TIME, A LAB TEST OF ATTENTION. THE CAFFEINE ARM IS SHOWN BECAUSE THE STUDY MEASURED IT; CAFFEINE IS NOT PART OF THE PROTOCOL. ROCA ET AL. 2026, J STRENGTH COND RES · PMID 42429835.
Everyone felt more tired. The Ke4 group stayed quick.
Caffeine made it sharper still. We don’t put caffeine in the protocol – that’s your call, your coffee.
Does more with less oxygen.
Tested in thin air.
Ketones are an oxygen-efficient fuel. In Richard Veech’s lab, hearts running on ketones did more work per unit of oxygen. Then researchers put people in thin air to see what happens in a whole body.
Two 2024 trials. 16 military personnel breathed air matching 20,000 ft (6,096 m) through a mask for 20 minutes – first at rest, then during a weighted ruck. On VKE, blood-oxygen saturation dropped less than on placebo: about 6 points at rest, 2.4–4.2% on the ruck. At rest, thinking speed dropped less too. Your resort tops out around 10,000–13,000 ft; the test was thinner than anything with a chairlift.
Not medicine. If you feel unwell up high, go down.
LAB MECHANISM: ISOLATED RAT HEARTS, VEECH LAB, 1990S. NOT A SKIING RESULT.
MCCLURE ET AL. 2024, EXP PHYSIOL · REST, 6,096 M, 650 MG OF KETONE ESTER PER KG · PMID 39190580
MCCLURE ET AL. 2024, EXP PHYSIOL · WEIGHTED RUCK, 573 MG/KG + 40 G DEXTROSE · PMID 39190570
vs placebo, breathing 20,000 ft air through a mask.
vs placebo, same air, carrying weight.
6,096 m. 20 minutes. 16 military personnel.
WHAT IT DIDN’T DO
No thinking-speed difference during exercise. No endurance gain in a cycling-in-thin-air study. At simulated altitude, oxygen held but sleep and performance didn’t improve.
Before first chair. Between runs. Before bed.
Keep it simple. Amounts for each product and goal are on the protocols page.
When you’re booting up.
It kicks in around 15 minutes. Take it in the parking lot, before the lodge coffee. Eat when you’d normally eat – best results come a couple hours away from a meal.
Lunch is for people who aren’t skiing.
Take it again every couple of hours depending on how hard you’re going. It’s fuel – the harder you go, the more you burn. Ke4 fits in a jacket pocket and doesn’t freeze solid like a bar.
A larger amount when you’re off the hill.
Take it as soon as you’re done for the day. That’s the recovery dose, and it pairs with a small amount before bed.
Rest starts at bedtime.
Take a small amount right before bed. In athletes, VKE after a strenuous day and before bed improved sleep efficiency and counteracted the drop in REM sleep.
FIRST TIME? GROOMERS, NOT A BACKCOUNTRY DAY. FIND YOUR DOSE WHERE A MISTAKE IS CHEAP.
VKE IS FUEL – NOT REHYDRATION. ALTITUDE DRIES YOU OUT. DRINK WATER.
More isn’t better. In the dose study, tripling the dose doubled blood ketones but didn’t increase the amount of ketone the body actually used – the measured gain came at the lower dose. Start low and work your way up to find the optimal VKE dose for you. See why →
Join the community of over 5,000 members.
Get advice or share your experience – what worked, what didn’t. ketoneaid.com/fb · TEXT 703-829-9411
Give it 8 weeks.
One day tells you how it feels. A full season shows you what you’re really capable of.
In trained athletes, 8 weeks of VKE after training and before bed came with about 4% more power than placebo. Measured in cyclists, not on snow. But power output is power output. 4% may not sound like a lot, but it is – the difference that makes a difference.
PROOF: Robberechts et al. 2026, J Physiol · trained cyclists · details ↓
Stock up!
Bulk packs bring the price per gram down. Pair with Auto-Ship for max savings. Get enough for the whole season.
Run the program?
Stock the program.
Ski patrol, race programs, guides, heli and cat ops, shop teams – buy in bulk, hand it out, see who’s still skiing hard at 3:30.
- One molecule, three concentrations – everyone finds a dose that works for their taste.
- No caffeine, no stimulants – no crash, fine before a dawn start.
- 3rd-party batch tested for WADA-prohibited substances.
- Ships worldwide.
No Other Ketone
Comes Close.
Every study on this page used one molecule: the Veech Ketone Ester, developed by Dr. Richard Veech and Todd King at NIH. Ketone salts, butanediol and other esters are different molecules with different research and lack the focus + performance results of VKE. A blood ketone reading is not the same as a result.
R 1,3-butanediol has inebriating sedative-like effects. It’s a great alcohol alternative, but not something you want on the hill. That’s why we use it in our own Hard Ketones Real Buzz. No Booze.™ line, and why it never goes in your jacket pocket.
One ester, three concentrations
Same molecule. Pick your potency.
Concentration decides taste.
Strong, bitter and most compact. Not “better”, just less water.
Three times the water of Ke4 at the same price per gram. We named the flavor "Not Bad" and meant it.
Ready to drink, nothing to measure. The easiest way to find out what this actually feels like.
ALL KETONEAID PRODUCTS ARE 3RD-PARTY BATCH TESTED FOR WADA-PROHIBITED SUBSTANCES. ATHLETES: CHECK YOUR EVENT / FEDERATION’S CURRENT RULES.
Ketone ester for skiing and snowboarding.
Does ketone ester help with skiing or snowboarding?
It’s superfuel. It won’t magically make you shred. Used alongside training, it should help you improve faster though. Train, recover, repeat – in an 8-week training study, the ketone ester group gained more power than placebo. VKE provides D-BHB, the same ketone your own liver makes, and your brain and muscles burn it. Primarily used for focus, flow, stamina and recovery, so you can ski more and have more fun doing it. The human studies are on this page; there’s no skiing trial yet, and these findings concern Veech Ketone Ester, not other ketone molecules. No other ketone comes close.
When do I take ketone ester for a ski day?
You should feel it in about 15 minutes. Take more every couple of hours on a big day. After, and a small amount before bed for recovery. It is fuel – the harder you go the more you burn, but more ≠ better. Take what you’ll use, ideally a couple hours away from food for best results. Several protocols exist; amounts for each product and goal are on the protocols page.
Does it help at altitude?
Yes, it should. In two human studies breathing thin air through a mask (equal to 20,000 ft), blood-oxygen saturation dropped less on VKE than on placebo, and at rest thinking speed held up better. If it doesn’t, we’ll help you tweak how you take it. If it still doesn’t work for you, we offer a risk-free money-back guarantee.
What hasn’t ketone ester done in thin-air studies?
Plenty, and you should hear it from us. At real resort altitudes the field studies are flat: at a US Army mountaineering school (7,500 to 13,600 ft, two full training days) ketone monoester gave no physical or cognitive benefit over placebo (Miyatsu 2024). At 3,375 m over three days it didn’t improve oxygenation, oxygen uptake or efficiency (Tominec 2025, 2026). At 4,000 m simulated it blunted high-intensity exercise performance and didn’t change thinking (Stalmans 2025), and the same group reports ketone ester can slow short, all-out efforts at sea level too. In the 20,000 ft mask trials, thinking speed during exercise was the same on VKE and placebo. What held up: a smaller blood-oxygen drop and steadier thinking at rest in very thin air, plus the focus, sleep and 8-week power results from sea-level studies. Not medicine. If you feel unwell up high, go down.
Will it freeze in my pocket?
Ke4 and Ke2 are mostly ester and water, so they get thick in the cold but stay pourable at normal ski-day temperatures; an inside pocket keeps them fine.
How does ketone ester feel?
Calm, alert energy: present and switched on, not wired. It isn’t a stimulant, so there’s no caffeine-style buzz, jitters or crash. Effects vary from person to person, so try it on a normal day first. Learn how it feels and find your dose before a big day or competition.
Does it help with recovery when my legs are shot?
Yes. Some of the most elite endurance athletes in the world use it for recovery – KetoneAid sponsors two Tour de France teams with product, not cash, because they actually use it. The measured ones: after a strenuous day, VKE improved sleep efficiency and counteracted the drop in REM sleep in exercised athletes, and with carbs after exercise, muscle glycogen refilled about 50% faster in one study. If you want legs for day three, that’s what matters.
Does ketone ester taste bad?
The Ke4 flavor is called Very Scary 🍒 for a reason. It’s strong and bitter with a cough syrup-like taste. Ke2 is three times the water of Ke4 at the same price per gram – we named it “Not Bad” 🍏 and mean it. Ketone Shot is “Almost Yummy”, peachy 🍑 and ready to drink. Same molecule, three concentrations; concentration decides taste.
Is it a stimulant? Is there caffeine in it?
No and no. VKE is a superfood. No added caffeine or stimulants, and caffeine isn’t part of the recommended protocol. One study of this ester included a separate arm with caffeine added, which is why caffeine appears in our research summaries. If you also use caffeine, start with less than usual.
Can I compete on it?
Veech Ketone Ester is not listed on the current WADA Prohibited List, and riders on Tour de France teams – about as scrutinized as anti-doping gets – use it openly. Every KetoneAid batch is 3rd-party tested for WADA-prohibited substances. Still check your federation’s current rules; you’re responsible for what you take.
Is it dangerous?
VKE, no. It’s a superfood that provides D-BHB, the same ketone your liver makes, and it has been studied for safety in healthy adults; very large amounts and/or mixing with C8 MCT oil can upset your stomach. R 1,3-butanediol, sold in some other ketone drinks, is a different story: it’s inebriating – it can be. Do not ski impaired. Our sister brand sells it for this purpose: Real Buzz. No Booze.™ (not for focus+performance).
Which one should I get?
First time: Ketone Shot or Ke2. Ski trip: Ke4 is the most concentrated, so a week fits in a jacket pocket. All three are the same Veech Ketone Ester; concentration alone doesn’t set how much ester you take, how much you drink does.
What if I don’t feel a difference with VKE?
Follow our protocols. If you don’t feel it, reach out and we’ll help you hone in on how to use it for your specific case. If you’re still not satisfied, we offer a money-back guarantee.
One more lap.
MONEY-BACK GUARANTEE. TRY IT ON A GROOMER DAY FIRST, NOT ON A POWDER DAY.
What’s actually been measured.
Every number on this page, with the protocol it came from. None of these were skiing trials; each one tests the Veech Ketone Ester in people, and we say where the line is.
Placebo got 9% slower on a reaction test. VKE held.
ROCA ET AL. 2026 · J STRENGTH COND RES · PMID 42429835
OPEN
Placebo got 9% slower on a reaction test. VKE held.
ROCA ET AL. 2026 · J STRENGTH COND RES · PMID 42429835
PROTOCOL
- 25 adults. Ke4 vs placebo vs Ke4 + caffeine.
- 20-minute mental-fatigue task; task-switching reaction time before and after.
WHAT HAPPENED
- Placebo 956 → 1,041 ms. Ke4 957 → 922 ms. Ke4 + caffeine 993 → 864 ms.
WHY IT MATTERS
- Reaction time held on VKE while placebo slowed. Late edges and late turns are reaction time.
CONTEXT
- Lab attention test, not a ski day. Dose wording pending the full text.
Multitasking errors rose by 1.8 on carbs alone. No rise with the ester.
EVANS & EGAN 2018 · MED SCI SPORTS EXERC
OPEN
Multitasking errors rose by 1.8 on carbs alone. No rise with the ester.
EVANS & EGAN 2018 · MED SCI SPORTS EXERC
PROTOCOL
- Intermittent shuttle running to exhaustion. 750 mg of ketone ester per kg, with carbs, vs carbs alone.
WHAT HAPPENED
- Multitasking errors rose by 1.8 on carbs alone; no rise with the ester. Reaction time, sprints and run time were unchanged.
WHY IT MATTERS
- Closest analog to bumps: hard effort, rest on the chair, repeat.
CONTEXT
- Team-sport runners. No endurance gain; the finding is about mistakes when exhausted.
After a strenuous day, sleep efficiency went up and the REM drop was counteracted.
ROBBERECHTS ET AL. 2023 · MED SCI SPORTS EXERC · PMID 37259248
OPEN
After a strenuous day, sleep efficiency went up and the REM drop was counteracted.
ROBBERECHTS ET AL. 2023 · MED SCI SPORTS EXERC · PMID 37259248
PROTOCOL
- Trained athletes. A strenuous training day, then VKE after training and before bed vs placebo.
WHAT HAPPENED
- Sleep efficiency improved; the exercise-induced drop in REM sleep was counteracted.
WHY IT MATTERS
- Back-to-back days and first chair run on last night’s sleep.
CONTEXT
- Sleep after hard exercise, not sleep in general.
8 weeks of VKE: about 4% more power than placebo.
ROBBERECHTS ET AL. 2026 · J PHYSIOL · PMID 41757674
OPEN
8 weeks of VKE: about 4% more power than placebo.
ROBBERECHTS ET AL. 2026 · J PHYSIOL · PMID 41757674
PROTOCOL
- 28 trained men enrolled. 8 weeks of training with VKE after sessions and before bed vs placebo.
WHAT HAPPENED
- 30-minute time-trial power: 302 vs 291 W, about 4% more.
WHY IT MATTERS
- Training adaptation over a block, not a one-day effect.
CONTEXT
- Cyclists on bikes, not skiers on snow.
In thin air at rest, blood-oxygen saturation dropped about 6 points less on VKE.
MCCLURE ET AL. 2024 · EXP PHYSIOL · PMID 39190580
OPEN
In thin air at rest, blood-oxygen saturation dropped about 6 points less on VKE.
MCCLURE ET AL. 2024 · EXP PHYSIOL · PMID 39190580
PROTOCOL
- 16 military personnel. 650 mg of ketone ester per kg. 20 minutes breathing air matching 6,096 m / 20,000 ft through a mask, at rest.
WHAT HAPPENED
- Saturation dropped less than placebo (about 6 points); thinking speed dropped less too.
WHY IT MATTERS
- A whole-body look at ketones as an oxygen-efficient fuel. 20,000 ft is thinner than any resort.
CONTEXT
- Thin air through a mask, at rest. Not medicine.
In thin air during a weighted ruck, the saturation drop was 2.4–4.2% smaller on VKE.
MCCLURE ET AL. 2024 · EXP PHYSIOL · PMID 39190570
OPEN
In thin air during a weighted ruck, the saturation drop was 2.4–4.2% smaller on VKE.
MCCLURE ET AL. 2024 · EXP PHYSIOL · PMID 39190570
PROTOCOL
- Same group. 573 mg/kg of ketone ester + 40 g dextrose. Weighted ruck in the same simulated altitude.
WHAT HAPPENED
- Saturation drop 2.4–4.2% smaller than placebo. No thinking-speed difference during exercise.
WHY IT MATTERS
- The oxygen effect held up under load.
CONTEXT
- A separate cycling-in-thin-air study found no endurance gain; at simulated altitude, sleep and performance didn’t improve.
A meal lowered the peak D-BHB by about a third.
STUBBS ET AL. 2017 · FRONT PHYSIOL · PMID 29163194
OPEN
A meal lowered the peak D-BHB by about a third.
STUBBS ET AL. 2017 · FRONT PHYSIOL · PMID 29163194
PROTOCOL
- Healthy adults. Ketone ester fed vs fasted; blood D-BHB measured over time.
WHAT HAPPENED
- Peak D-BHB about a third lower after a meal.
WHY IT MATTERS
- Parking-lot timing beats lodge-breakfast timing. Eat around it, not instead of it.
CONTEXT
- Blood ketones, not performance, were measured.
With carbs after exercise, muscle glycogen refilled about 50% faster in one study. Not in the next.
HOLDSWORTH ET AL. 2017 · VANDOORNE ET AL. 2017
OPEN
With carbs after exercise, muscle glycogen refilled about 50% faster in one study. Not in the next.
HOLDSWORTH ET AL. 2017 · VANDOORNE ET AL. 2017
PROTOCOL
- Holdsworth: ketone ester + glucose infusion after exercise, n=12.
- Vandoorne: ketone ester + oral carbs and protein after exercise.
WHAT HAPPENED
- Holdsworth: glycogen resynthesis about 50% higher.
- Vandoorne: no glycogen difference; more muscle-building signaling (mTORC1).
WHY IT MATTERS
- Recovery fuel is a real effect, and it depends on what you eat with it.
CONTEXT
- Same molecule, different protocol, different result. The glucose IV is not a meal.
Tripling the dose doubled blood ketones; the measured gain came at the lower dose.
DEARLOVE ET AL. 2021
OPEN
Tripling the dose doubled blood ketones; the measured gain came at the lower dose.
DEARLOVE ET AL. 2021
PROTOCOL
- 18 g vs 53 g, single acute dose, n=6.
WHAT HAPPENED
- Blood ketones doubled; ketone oxidation didn’t rise. Efficiency gain at the lower dose.
WHY IT MATTERS
- More isn’t better. Start low, find your dose.
CONTEXT
- Six people. A direction, not a headline.
VKE is a food, not a dietary supplement. The studies on this page used Veech Ketone Ester (aka ketone monoester); results do not transfer to other ketone products. Amounts and timing for each product are on the protocol page. Statements on this page describe the role of a food in nutrition and performance; they are not medical advice.