KetoneAid Ke2 on the pool deck
VEECH KETONE ESTER / SWIMMING

FUEL THE SESSION.
RECOVER FOR THE NEXT.

Veech Ketone Ester gives your brain and muscles another source of fuel. Use it around your swim training for focus, energy and recovery.

TRY VKE RISK-FREE →
FOCUS. ENERGY. RECOVERY.

Same pool.
More to work with.

Stay tuned in during the set. Fuel the work. Make recovery part of the plan.

VKE raises blood ketones: fuel your brain and muscles can use, alongside your normal nutrition. Start in training and see what it adds to your routine.

STAY TUNED IN FUEL THE WORK READY FOR TOMORROW
Butterfly swimmer emerging from the water
FOCUS + FEEL

Keep your head in the swim.

The pace. The breathing. The next turn. Swimming gives your brain plenty to do.

Try VKE before training for focus and feel. Look for whether you feel more tuned in as the session goes on—not a jolt of stimulation.

A mental-fatigue study found that ketone ester prevented the slowdown seen with placebo on a reaction-time task. See the trial below.

SEE THE TEST →
Ketone Shot held beside a swimming pool
A SIMPLE FIRST TRY. TAKE IT TO TRAINING.

FOCUS

Mental fatigue slows you down.
Ke4 blocked the slowdown.

After 20 minutes of hard mental work, people on placebo were 9% slower at switching between tasks. On Ke4, their speed held. With caffeine, they got faster.

Roca, Barker & Waldman, J Strength Cond Res, 2026. Randomized, double-blind, placebo-controlled crossover in 25 healthy adults (20 men, 5 women). Ke4 at 200 mg per kg body weight, taken 30 minutes before a 20-minute mental-fatigue task. Group means; perceived fatigue rose in every condition. The caffeine arm (Ke4 + 200 mg caffeine) started from a slower baseline; the study had no caffeine-only arm. Laboratory task-switching, not a swimming performance test.

Task-switching reaction time

Group averages, before and after the fatigue task

Task-switching reaction time Ke4: 957 ms before, 922 ms after. Placebo: 956 ms before, 1,041 ms after. Ke4 + caffeine: 993 ms before, 864 ms after. Lower is faster. 20-MIN MENTAL FATIGUE TASK 850 ms 900 ms 950 ms 1,000 ms 1,050 ms↑ FASTER↓ SLOWERBEFOREAFTER 957 ms993 msKe4 + caffeine · 864 ms 13% fasterKe4 · 922 ms No slowdown Placebo · 1,041 ms 9% slower Task-switching reaction time Ke4: 957 ms before, 922 ms after. Placebo: 956 ms before, 1,041 ms after. Ke4 + caffeine: 993 ms before, 864 ms after. Lower is faster. 20-MIN MENTAL FATIGUE TASK 850 ms 900 ms 950 ms 1,000 ms 1,050 ms↑ FASTER↓ SLOWERBEFOREAFTER 957 ms993 ms
Ke4 packed with swimming gear
STAMINA

Superfuel the work.

Long sets and long swims need fuel. VKE gives you another option alongside your normal nutrition.

Use it in training to find the routine that suits you. Some will keep carbohydrates, hydration and electrolytes in place, while others may prefer ketones alone.

For long-term training benefits, make it a routine. The endurance studies tested repeated use across training blocks.

GET THE AMOUNT + TIMING →
RECOVERY

Late session.
Early alarm.

Tomorrow’s swim starts with tonight’s recovery.

Eat. Rehydrate. Leave time for sleep. Add VKE to your post-training and pre-sleep routine using the recovery protocol.

A study after strenuous exercise found less sleep disruption with ketone ester. Use the recovery protocol for amounts and timing.

WHAT THE SLEEP STUDY FOUND

Less disruption.
More of the night
for sleep.

The hard training day disturbed sleep.
Ketone ester counteracted that effect.

READ THE RESULT →
ENDURANCE STUDY / 8 WEEKS+4%

More power after 8 weeks vs placebo

Four percent wins races.

PLACEBO · 291 W
KETONE ESTER · 302 W

FINAL 30-MINUTE TIME TRIAL / TRAINED MEN

THE TRAINING BLOCK

Give it 4 weeks.

One session tells you how it feels. A training block shows you what you're really capable of.

For best results, we recommend consistent use across 4-8 weeks, built around training and recovery. Follow the protocols and track the things you already care about: session quality, recovery and your splits.

The +4% result was measured in cyclists. It supports the training approach; it does not predict your swim times.

More isn’t always better. In the only dose study, tripling the dose doubled blood ketones but the measured gain came at the lower dose. Start low, test in training. See why →

THE MOLECULE

DIFFERENT KETONES,
DIFFERENT RESULTS.

These studies tested Veech Ketone Ester: the molecule in Ketone Shot, Ke2 and Ke4.

Other ketones do not inherit these results just because they raise a ketone reading.

COMPARE THE KETONES →

No Other Ketone
Comes Close

Open-water swimmers
FROM THE WATER
“The Ke4 provided the fuel to push and I definitely felt I could have pushed even harder.”

Andras A Feszthammer · Ironman athlete

From a customer review describing long rides and 4,000+ yard swims.

GET IT IN YOUR SWIM BAG

Choose your VKE.

Concentration decides taste.
All three are the same Veech Ketone Ester at different dilutions.

Focus, Energy, Recovery
KetoneAid Ketone Shot

Ketone Shot

EASY FIRST TRY · POOL-BAG CARRY 8% VKE · 5g READY TO DRINK

Lowest-friction way to try VKE or carry a single serving.

SHOP KETONE SHOTS
KetoneAid Ke2

Ke2

REGULAR PRACTICE USE · MULTI-SERVING 25% VKE · 25g PER BOTTLE

Same Veech Ketone Ester, more diluted and easier to drink.

STOCK UP AND SAVE
KetoneAid Ke4

Ke4

CONCENTRATED USE · MOST VKE PER BOTTLE 50% VKE · 30g PER BOTTLE

Most concentrated. The most VKE in the fewest bottles, and the most potent taste.

STOCK UP AND SAVE

ALL KETONEAID PRODUCTS ARE 3RD-PARTY BATCH TESTED FOR WADA-PROHIBITED SUBSTANCES. ATHLETES: CHECK YOUR EVENT / FEDERATION’S CURRENT RULES.

THE RECEIPTS

The result.
Then the details.

Mental fatigue: no placebo-style slowdown.

25 healthy adults completed a crossover laboratory study. After a mental-fatigue task, task-switching reaction time rose by 85 ms with placebo and changed by −35 ms with ketone monoester. The difference in changes favored the ester; the ester’s own change was not statistically significant. The chart shows group means, not every participant. A lab reaction-time result does not establish better swim technique.

READ THE PAPER · PMID 42429835 →
Sleep after strenuous exercise.

A strenuous training day increased wakefulness after sleep onset by 95% versus a rest day. Ketone ester counteracted that increase and the decline in REM sleep. The 95% describes the exercise-induced problem—not a 95% sleep improvement with VKE.

READ THE PAPER · PMID 37259248 →
Eight weeks: more power.

28 trained men were enrolled in eight weeks of endurance over-training. Post-exercise and pre-sleep ketone supplementation produced higher final 30-minute time-trial power: 302 versus 291 W, approximately 4%. This is cycling evidence for a consistent training-and-recovery approach, not a measured swimming gain.

READ THE PAPER · PMID 41757674 →
Training overload: a different endurance application.

During a three-week cycling overload study, ketone ester blunted overreaching symptoms and supported greater training load. This was an intensive cycling protocol; it does not show that taking VKE before a swim immediately increases stamina.

READ THE PAPER · PMID 31039280 →
STRAIGHT ANSWERS

Before you jump in.

Will Ke4 make me swim faster?

Placebo is a powerful thing, so let's say "YES!"? Just kidding, VKE is a superfuel option to test alongside your training. The studies below support focus, sleep and training benefits; while some cycling studies with similar output have shown a 4% improvement. Track how you feel, how you recover and your splits.

Which product should I start with?

Ketone Shot is the simplest first try. Ke2 is more diluted than Ke4 and easier to drink. Ke4 packs more VKE into less liquid, with a stronger taste. All three use the same molecule.

When should I take it?

Try it during training first. Use the product-specific amounts and timing on the VKE protocols page. Effects typically begin around 15 minutes. Get familiar with your routine before a meet or open-water event.

Does this replace breakfast, gels or sports drinks?

Yes/No. For some, they prefer it over food and carbs. Others keep the carbs. Both ways do something different. But this is a multi hour explanation, longer than we can answer in a quick FAQ question. Do not cut your fluids and electrolytes.

Do I need to be keto?

No. You can use VKE while eating carbohydrates. You do not need a ketogenic diet or a fast. But those that are keto or do fasted workouts already may see the biggest immediate improvement.

How long should I give it?

Use a few training sessions to get familiar with taste, amount and timing. For the training and recovery approach, we recommend consistent use across an 4-week block. Track session quality, recovery and your normal swim metrics.

What does it taste like?

Horrible. So bad it has to work right? Actually Ke4 is the strongest most bitter one. Ke2 is more diluted; Ketone Shot is the easiest first try. Chill it and follow the product directions. More is not always better.

What about caffeine?

Yes, but some prefer it instead of caffeine. Keept your heart rate and jitters down. However, the science tested Ke4 + 200 mg caffeine. That group improved its task-switching reaction time by 13% from its own baseline. There was no caffeine-only arm, so it cannot tell us what Ke4 added to caffeine alone. We recommend trying VKE on its own first. Some users report jitters, a crash and sleep disruption when combining ketone esters with caffeine.

Is it allowed in competition?

All KetoneAid products are 3rd-party batch tested for WADA-prohibited substances.

What if it is not for me?

Try it risk-free under the KetoneAid money-back guarantee (up to $150). The standard guarantee terms apply. If you need help choosing a product or routine, text 703-829-9411.

What is the best ketone to buy?

Start by checking the molecule on the label. The Veech Ketone Ester is D-BHB bonded to R 1,3 butanediol — one bonded molecule, not the two ingredients mixed. That is the main ketone ester in most of the human studies, and only two companies in the world make it commercially. KetoneAid is the one made in the USA, sold in three concentrations (Ke4, Ke2, Ketone Shot), with every batch 3rd-party tested for WADA-prohibited substances. Other “ketone esters” exist — D-BHB bonded to glycerol, and diesters such as medium-chain fatty acids or acetoacetate bonded to 1,3 butanediol — so check the chemical name before assuming the research applies. Read the full answer →

Ketone-IQ vs ketone ester — which is better?

They are different molecules, so compare the evidence, not the taste or price. Ketone-IQ is R 1,3 butanediol (a ketone diol) — an alcohol and a ketone precursor the liver converts to D-BHB. KetoneAid is the Veech Ketone Ester (VKE) — D-BHB bonded to R 1,3 butanediol — the molecule in most of the published human outcome studies. In the one matched 10 g head-to-head, VKE raised blood D-BHB about twice as much as the diol. If you want the molecule from the research, that is the Veech Ketone Ester. Read the full answer →

Are exogenous ketones worth it?

Not always. It depends on the molecule and what you want from it. If you want the results from the published studies — energy, endurance, recovery — buy the molecule those studies used: the Veech Ketone Ester. Ketone salts, BHB free acid, R 1,3 butanediol and precursors like MCT oil may move a ketone meter; they do not inherit VKE’s human results. Start low, find your dose, judge it on how you perform, not the number on the blood meter. Read the full answer →

NEXT SESSION

Get it in your
swim bag.

Pick your VKE. Try it in training. Build a routine that works for you.

TRY IT RISK-FREE →

Money-back guarantee. Standard terms apply.

Need help choosing?

Text 703-829-9411. Tell us how you train.

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