⚡ CELL BOOSTER™ · 6 shots for €24,40 · 4 x 6 = 10% off · subscribe and save 15%

Olivier Withofs · PGA Golf Professional

A dip in the middle of your performance? One shot, 15 to 30 minutes before.

80 mg caffeine for alertness, NR and magnesium for cell energy. One 25 ml shot. This is what Olivier takes when a round asks more.

Olivier Withofs
Olivier WithofsBRONN ambassador · golf
★★★★★ 4.81/5 from 16 reviews
Recognise this?

Three moments that ask for focus, not a crash.

01

Halfway through your performance

The first half went fine. Then the concentration slips and every rep, every lap or every hole becomes work. Every athlete knows the moment.

02

The practice session after work

Head still at the office, a training ahead of you. You want to be present, not wired on coffee number four.

03

The long day

Early start, a match, a race or back-to-back meetings. A sugary energy drink gives you a spike now and a crash later.

The mechanism

Why a shot can be sharp and calm.

1 · Precision caffeine

80 mg caffeine. Enough to sharpen, not enough to shake.

80 mg caffeine contributes to increased alertness and concentration. About one good espresso, half of a typical energy drink. No sugar, so no spike and no crash an hour later.

2 · Cell energy

NR and magnesium: the energy your cells make.

150 mg NR helps maintain NAD+, the molecule your mitochondria use to produce energy. 100 mg organic magnesium contributes to normal muscle function and to the reduction of tiredness and fatigue.

3 · Flow

L-citrulline, taurine and L-carnitine.

A high-dose amino-acid matrix (3000 mg) plus 1000 mg L-carnitine. Liquid, so it is absorbed fast, engineered with ABSORPTIX® for stability and uptake.

Olivier Withofs
Olivier Withofs · PGA Golf Professional

“I used to grab an energy drink during a dip. I got more energy for a moment, but I dropped back very quickly, sometimes even lower than before. With CELL BOOSTER™ I feel the energy and focus hold for longer.”

Olivier Withofs
PGA Golf Professional · BRONN ambassador
What is in one shot

Six actives. One 25 ml shot.

01

Caffeine, 80 mg

A precise 80 mg per shot. Caffeine contributes to increased alertness and concentration. One shot, one moment.

Focus
02

Nicotinamide riboside (NR), 150 mg

A premium NAD+ precursor that helps maintain the molecule your mitochondria use to make energy.

Cell energy
03

Organic magnesium, 100 mg

Magnesium citrate contributes to normal muscle function and to the reduction of tiredness and fatigue.

Muscle and fatigue
04

L-citrulline, 2000 mg

A high-dose amino acid that supports blood flow, so oxygen and nutrients reach the muscle.

Flow
05

Taurine, 1000 mg

An amino acid that works alongside L-citrulline in the matrix and is found naturally in muscle and heart tissue.

Amino acid
06

L-carnitine, 1000 mg

The metabolic catalyst that carries fatty acids into the mitochondria for energy.

Metabolism
Plus

Powered by ABSORPTIX®

A 25 ml liquid shot instead of a capsule that has to break down first. Formulated with ABSORPTIX®, BRONN's patented formulation logic, for stability and rapid uptake. Red Energy aroma, no sugar, no artificial colours.

Patented formulation logic · BE 2026 / 7260 · Made in Belgium
ABSORPTIX®
The comparison

Energy drink vs CELL BOOSTER™.

Energy drinkEnergy drink CELL BOOSTER™CELL BOOSTER™
Caffeine90 to 200 mgExactly 80 mg
SugarUp to 40 g0 g
Works onOnly your nervesFocus + cell energy
An hour laterThe dip or crashNo sugar crash
Format250-500 ml can25 ml shot

Category-level comparison (energy drinks), not a specific brand. CELL BOOSTER™ contains caffeine (80 mg per shot): not recommended for children, pregnant or breastfeeding women.

What to expect, and when

One shot. One moment.

Results vary from person to person. This is what we typically hear from CELL BOOSTER™ users.

After 15-30 min
Alertness and concentration come up. Take it before the moment.
After 1 hour
No sugar spike, so no crash.
After 3-4 hours
The caffeine fades gradually. Your evening stays calm.
CELL BOOSTER™ shot
1 shot
25 ml
How Olivier takes it

Shake, drink, 15 to 30 minutes before the moment. Max. one a day. Not with other caffeine sources late in the day.

Reviews

What CELL BOOSTER™ users say about their focus.

★★★★★ 4.81/5 · 16 reviews
★★★★★✓ Verified

“Perfect for an afternoon dip. Better than coffee.”

Femke V. · reviews.io · verified
★★★★★✓ Verified

“Ideal before sport. No palpitations like with a pre-workout, but sharp.”

Bart Van Damme · reviews.io · verified
★★★★★✓ Verified

“No sugar crash afterwards, that is the most important thing for me.”

Simon De Clercq · reviews.io · verified

Verified CELL BOOSTER™ reviews via reviews.io, translated. Individual results vary.

Choose your pack

CELL BOOSTER™: one shot per moment, however many moments you have.

NUT-registered · Belgian FPSDeveloped by pharmacistsFree shipping on subscription
Best value · 15% off
SubscriptionCELL BOOSTER™ monthly
For:never running out
One 6-pack a month, 15% off, free shipping. Cancel after month 2, swap or adjust at any time.
€20,74/mo instead of €24,40
€3,46 per shot
SUBSCRIBE TO CELL BOOSTER™€20,74 a month · 15% off · free shipping →
CELL BOOSTER™ 6-pack
For:six moments that count
Six 25 ml shots, Red Energy aroma. Take one 15 to 30 minutes before a workout, a meeting or a round.
€24,40 €4,07 per shot
Buy one 6-pack →
CELL BOOSTER™ 4 x 6
For:a month of sharp moments
24 shots (4 x 6) in one order, 10% off, applied automatically in your cart.
€87,84 instead of €97,60 · 10% off
Get 4 x 6, save 10% →
Good to know

Your questions about CELL BOOSTER™, answered.

When do I take it?

15 to 30 minutes before the moment you want to be sharp: a workout, a meeting, a long drive. Olivier takes it before a competition or halfway through a round, when his energy usually drops. Shake well and drink the whole shot. Max. one a day.

How much caffeine is in a shot?

80 mg per 25 ml shot, about one strong espresso and roughly half of a typical energy drink. Enough for alertness and concentration, low enough to keep your heart rate calm. Not recommended for children, pregnant or breastfeeding women.

Is it an energy drink?

No. An energy drink is sugar plus a lot of caffeine in a big can. CELL BOOSTER™ is a 25 ml shot with a precise 80 mg of caffeine, no sugar, and actives an energy drink does not have: NR for NAD+, magnesium, L-citrulline, taurine and L-carnitine. It fits in any pocket.

Can I combine it with CELL FUEL™ or LIFE FUEL™?

Yes. Olivier takes CELL FUEL™ every morning as the daily base and CELL BOOSTER™ on the days that ask more. Neither CELL FUEL™ nor LIFE FUEL™ contains caffeine, so the combination is easy.

Who is Olivier Withofs?

A Belgian PGA Golf Professional and BRONN ambassador. He plays and teaches golf, trains most days of the week and uses BRONN in his own routine. He shares what he does; he does not give medical advice.

Are BRONN supplements officially registered?

Yes. Every BRONN supplement is NUT-registered with the Belgian FPS Public Health, developed by Belgian pharmacists and made in Belgium. They are food supplements, not a replacement for a varied diet. Pregnant or breastfeeding, or taking medication? Check with your doctor or pharmacist first.

How does the subscription work?

One delivery a month at 15% off with free shipping. Swap products, adjust quantities or skip a month whenever you want. Cancel after month 2.

The bottom line

Sharp when it counts. Without the crash.

CELL BOOSTER™: 80 mg caffeine for alertness, NR and magnesium for cell energy. One 25 ml shot, 15 to 30 minutes before the moment. Developed by Belgian pharmacists, the shot Olivier Withofs takes when a day asks more.

★★★★★ 4.81/5 · verified buyers
Or read more on the CELL BOOSTER™ product page →